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Seesamut T, Oba Y, Jirapatrasilp P, Martinsson S, Lindström M, Erséus C, Panha S. Global species delimitation of the cosmopolitan marine littoral earthworm Pontodrilus litoralis (Grube, 1855). Sci Rep 2024; 14:1753. [PMID: 38243053 PMCID: PMC10799051 DOI: 10.1038/s41598-024-52252-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/16/2024] [Indexed: 01/21/2024] Open
Abstract
The marine littoral earthworm Pontodrilus litoralis (Grube, 1855) is widely distributed and is reported as a single species. This study utilized an integrative taxonomic approach based upon morphological examination, phylogenetic reconstruction, and molecular species delimitation, to test whether the taxon is a single species or a species complex. For this, a total of 114 P. litoralis specimens collected from North America, Africa, Australia and Oceania, Europe and Asia were used. The phylogenetic analyses revealed deeply divergent mitochondrial lineages and a high level of genetic diversity among P. litoralis populations. Both single and multi-locus species delimitation analyses yielded several molecular operational taxonomic units. Therefore, due to the homogeneity of morphological characteristics, it is likely that the morphospecies P. litoralis is a complex of four or more cryptic species, suggesting that more sampling is required and that the population structure genetic data and gene flow need to be investigated.
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Affiliation(s)
- Teerapong Seesamut
- Department of Biology, Faculty of Science, Rangsit University, Pathumthani, 12000, Thailand
| | - Yuichi Oba
- Department of Environmental Biology, Chubu University, Kasugai, 487-8501, Japan
| | - Parin Jirapatrasilp
- Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Svante Martinsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30, Göteborg, Sweden
| | - Maria Lindström
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30, Göteborg, Sweden
| | - Christer Erséus
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30, Göteborg, Sweden.
| | - Somsak Panha
- Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
- Academy of Science, The Royal Society of Thailand, Bangkok, 10300, Thailand.
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Mack JM, Klinth M, Martinsson S, Lu R, Stormer H, Hanington P, Proctor HC, Erséus C, Bely AE. Cryptic carnivores: Intercontinental sampling reveals extensive novel diversity in a genus of freshwater annelids. Mol Phylogenet Evol 2023; 182:107748. [PMID: 36858082 DOI: 10.1016/j.ympev.2023.107748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 01/30/2023] [Accepted: 02/23/2023] [Indexed: 03/02/2023]
Abstract
Freshwater annelids are globally widespread in aquatic ecosystems, but their diversity is severely underestimated. Obvious morphological features to define taxa are sparse, and molecular phylogenetic analyses regularly discover cryptic diversity within taxa. Despite considerable phylogenetic work on certain clades, many groups of freshwater annelids remain poorly understood. Included among these are water nymph worms of the genus Chaetogaster (Clitellata: Tubificida: Naididae: Naidinae). These worms have diverged from the detritivorous diet of most oligochaetes to become more predatory and exist as omnivores, generalist predators, parasites, or symbionts on other invertebrates. Despite their unusual trophic ecology, the true diversity of Chaetogaster and the phylogenetic relationships within the genus are uncertain. Only three species are commonly referenced in the literature (Chaetogaster diaphanus, Chaetogaster limnaei, and Chaetogaster diastrophus), but additional species have been described and prior molecular data suggests that there is cryptic diversity within named species. To clarify the phylogenetic diversity of Chaetogaster, we generated the first molecular phylogeny of the genus using mitochondrial and nuclear sequence data from 128 worms collected primarily across North America and Europe. Our phylogenetic analyses suggest that the three commonly referenced species are a complex of 24 mostly cryptic species. In our dataset, Chaetogaster "diaphanus" is represented by two species, C. "limnaei" is represented by three species, and C. "diastrophus" is represented by 19 species. North American and European sequences are largely interspersed across the phylogeny, with four pairs of clades involving distinct North American and European sister groupings. Overall, our study demonstrates that the species diversity of Chaetogaster has been underestimated and that carnivory has evolved at least twice in the genus. Chaetogaster is being used as a model for symbiotic evolution and the loss of regenerative ability, and our study indicates that researchers must be careful to identify which species of Chaetogaster they are working with in future studies.
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Affiliation(s)
- Joseph M Mack
- Department of Biology, University of Maryland, MD 20742, USA.
| | - Mårten Klinth
- Department of Biological and Environmental Sciences, University of Gothenburg, Göteborg, SE-405 30, Sweden
| | - Svante Martinsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Göteborg, SE-405 30, Sweden
| | - Robert Lu
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
| | - Hannah Stormer
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
| | - Patrick Hanington
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
| | - Heather C Proctor
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
| | - Christer Erséus
- Department of Biological and Environmental Sciences, University of Gothenburg, Göteborg, SE-405 30, Sweden
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Martinsson S, Malmberg K, Bakken T, Korshunova T, Martynov A, Lundin K. Species delimitation and phylogeny of
Doto
(Nudibranchia: Dotidae) from the Northeast Atlantic, with a discussion on food specialization. J ZOOL SYST EVOL RES 2021. [DOI: 10.1111/jzs.12561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Svante Martinsson
- Systematics and Biodiversity Department of Biological and Environmental Sciences University of Gothenburg Gothenburg Sweden
| | | | - Torkild Bakken
- NTNU University Museum Norwegian University of Science and Technology Trondheim Norway
| | | | | | - Kennet Lundin
- Gothenburg Natural History Museum Gothenburg Sweden
- Gothenburg Global Biodiversity Centre University of Gothenburg Gothenburg Sweden
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Klinth MJ, Rota E, Martinsson S, Prantoni AL, Erséus C. New insights into the systematics of Lumbricillus and Marionina (Clitellata: Enchytraeidae) inferred from Southern Hemisphere samples, including three new species. Zool J Linn Soc 2021. [DOI: 10.1093/zoolinnean/zlab073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Enchytraeid worms collected in South Africa and on the Marion, South Orkney, South Georgia and South Shetland Islands during 2008–2015 were studied using morphology and seven genetic markers. Nine species were recognized: one terrestrial (Christensenidrilus blocki) and all the others marine littoral (five Lumbricillus and three Marionina s.s.). An estimated phylogeny including other enchytraeids from the Northern Hemisphere, many of which are members of Lumbricillus and some representing Marionina s.l., confirmed a non-monophyletic Lumbricillus, with some of its current species closely related to Grania or Marionina s.s. The phylogeny also corroborated a non-monophyletic Marionina s.l., with Marionina s.s. closely related to Grania and Lumbricillus s.l., but not to the remaining sequenced ‘Marionina’ or to Ch. blocki. These results provide a long-needed starting point for a revision of both Marionina and Lumbricillus. We provide morphological descriptions of all nine species, three of which are new to science: Lumbricillus finisafricae sp. nov., Lumbricillus nivalis sp. nov., and Marionina fusca sp. nov. Comments on three related species of Marionina s.s. based on re-examined type material are also provided.
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Affiliation(s)
- Mårten J Klinth
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
| | - Emilia Rota
- Department of Physics, Earth and Environmental Sciences, University of Siena, Via P.A. Mattioli 4, IT-53100 Siena, Italy
| | - Svante Martinsson
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
| | - Alessandro L Prantoni
- Department of Oceanography, Institute of Geosciences, Federal University of Bahia, 40170-110 Salvador, Bahia, Brazil
| | - Christer Erséus
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
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Lebedev AV, Acar K, Garzón B, Almeida R, Råback J, Åberg A, Martinsson S, Olsson A, Louzolo A, Pärnamets P, Lövden M, Atlas L, Ingvar M, Petrovic P. Psychedelic drug use and schizotypy in young adults. Sci Rep 2021; 11:15058. [PMID: 34301969 PMCID: PMC8302700 DOI: 10.1038/s41598-021-94421-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 07/08/2021] [Indexed: 11/13/2022] Open
Abstract
Despite recently resurrected scientific interest in classical psychedelics, few studies have focused on potential harms associated with abuse of these substances. In particular, the link between psychedelic use and psychotic symptoms has been debated while no conclusive evidence has been presented. Here, we studied an adult population (n = 1032) with a special focus on young (18–35 years) and healthy individuals (n = 701) to evaluate the association of psychedelic drug use with schizotypy and evidence integration impairment typically observed in psychosis-spectrum disorders. Experimental behavioural testing was performed in a subsample of the subjects (n = 39). We observed higher schizotypy scores in psychedelic users in the total sample. However, the effect size was notably small and only marginally significant when considering young and healthy subjects (Cohen’s d = 0.13). Controlling for concomitant drug use, none of our analyses found significant associations between psychedelic use and schizotypal traits. Results from experimental testing showed that total exposure to psychedelics (frequency and temporal proximity of use) was associated with better evidence integration (Cohen’s d = 0.13) and a higher sensitivity of fear responses (Cohen’s d = 1.05) to the effects instructed knowledge in a reversal aversive learning task modelled computationally with skin conductance response and pupillometry. This effect was present even when controlling for demographics and concomitant drug use. On a group level, however, only difference in sensitivity of fear responses to instructed knowledge reached statistical significance. Taken together, our findings suggest that psychedelic drug use is only weakly associated with psychosis-like symptoms, which, in turn, is to a large extent explained by psychiatric comorbidities and use of other psychoactive substances. Our results also suggest that psychedelics may have an effect on flexibility of evidence integration and aversive learning processes, that may be linked to recently suggested therapeutic effects of psychedelic drugs in non-psychotic psychiatric populations.
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Affiliation(s)
- Alexander V Lebedev
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden.
| | - K Acar
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
| | - B Garzón
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Department of Psychology, University of Gothenburg, Göteborg, Sweden
| | - R Almeida
- Stockholm University Brain Imaging Center (SUBIC), Stockholm University, Stockholm, Sweden
| | - J Råback
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
| | - A Åberg
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
| | - S Martinsson
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
| | - A Olsson
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
| | - A Louzolo
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
| | - P Pärnamets
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden.,Department of Psychology, New York University, New York, USA
| | - M Lövden
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Department of Psychology, University of Gothenburg, Göteborg, Sweden
| | - L Atlas
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD, USA.,National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA.,National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - Martin Ingvar
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
| | - P Petrovic
- Department of Clinical Neuroscience, Karolinska Institutet, K8 Klinisk neurovetenskap, K8 Neuro Ingvar, 171 77, Stockholm, Sweden
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Martinsson S, Klinth M, Erséus C. Distribution and genetic diversity of two earthworms, Helodrilus oculatus and Satchellius mammalis (Clitellata: Lumbricidae) in Scandinavia. Fauna Norv 2021. [DOI: 10.5324/fn.v41i0.3874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We report on the Scandinavian distribution of two earthworm species, Helodrilus oculatus and Satchellius mammalis. Both appear relatively new to the Scandinavian Peninsula, as they were not included in the monographic revisions of the earthworm fauna of Sweden and Norway in the mid-1900s. We provide recent records of both species from Norway and Sweden, H. oculatus also from Denmark, and haplotype networks of four markers (COI, 16S, H3, and ITS2) are used to visualise the genetic diversity within each species. There is moderate genetic variation in COI for both taxa, and for H. oculatus, there is a West-East division between the specimens from Norway, Gothenburg (western Sweden) and Bavaria (Germany), and the ones from eastern Sweden and the Bornholm island (easternmost Denmark). This could potentially be explained by different origin and colonisation routes. In the other markers the variation is limited, and in the nuclear genes no pattern to support this split is seen. We also analyse the phylogenetic positions of H. oculatus and S. mammalis in the family Lumbricidae by combining our data (including also some12S, 18S and 28S sequences) with a published dataset. We conclude that neither Helodrilus nor Satchellius are monophyletic. Helodrilus oculatus (type species of Helodrilus), however, forms a clade with some of its current congeners.
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Martinsson S, Klinth M, Erséus C. Testing species hypotheses for Fridericia magna, an enchytraeid worm (Annelida: Clitellata) with great mitochondrial variation. BMC Evol Biol 2020; 20:116. [PMID: 32928097 PMCID: PMC7488859 DOI: 10.1186/s12862-020-01678-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 08/20/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Deep mitochondrial divergences were observed in Scandinavian populations of the terrestrial to semi-aquatic annelid Fridericia magna (Clitellata: Enchytraeidae). This raised the need for testing whether the taxon is a single species or a complex of cryptic species. RESULTS A total of 62 specimens from 38 localities were included in the study, 44 of which were used for species delimitation. First, the 44 specimens were divided into clusters using ABGD (Automatic Barcode Gap Discovery) on two datasets, consisting of sequences of the mitochondrial markers COI and 16S. For each dataset, the worms were divided into six not completely congruent clusters. When they were combined, a maximum of seven clusters, or species hypotheses, were obtained, and the seven clusters were used as input in downstream analyses. We tested these hypotheses by constructing haplowebs for two nuclear markers, H3 and ITS, and in both haplowebs the specimens appeared as a single species. Multi-locus species delimitation analyses performed with the Bayesian BPP program also mainly supported a single species. Furthermore, no apparent morphological differences were found between the clusters. Two of the clusters were partially separated from each other and the other clusters, but not strongly enough to consider them as separate species. All 62 specimens were used to visualise the Scandinavian distribution, of the species, and to compare with published COI data from other Fridericia species. CONCLUSION We show that the morphospecies Fridericia magna is a single species, harbouring several distinct mitochondrial clusters. There is partial genetic separation between some of them, which may be interpreted as incipient speciation. The study shows the importance of rigorous species delimitation using several independent markers when deep mitochondrial divergences might give the false impression of cryptic speciation.
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Affiliation(s)
- Svante Martinsson
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30, Göteborg, Sweden.
| | - Mårten Klinth
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30, Göteborg, Sweden
| | - Christer Erséus
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30, Göteborg, Sweden
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Palano G, Jansson M, Backmark A, Martinsson S, Sabirsh A, Hultenby K, Åkerblad P, Granberg KL, Jennbacken K, Müllers E, Hansson EM. A high-content, in vitro cardiac fibrosis assay for high-throughput, phenotypic identification of compounds with anti-fibrotic activity. J Mol Cell Cardiol 2020; 142:105-117. [PMID: 32277974 DOI: 10.1016/j.yjmcc.2020.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/31/2020] [Accepted: 04/02/2020] [Indexed: 12/26/2022]
Abstract
A key feature in the pathogenesis of heart failure is cardiac fibrosis, but effective treatments that specifically target cardiac fibrosis are currently not available. A major impediment to progress has been the lack of reliable in vitro models with sufficient throughput to screen for activity against cardiac fibrosis. Here, we established cell culture conditions in micro-well format that support extracellular deposition of mature collagen from primary human cardiac fibroblasts - a hallmark of cardiac fibrosis. Based on robust biochemical characterization we developed a high-content phenotypic screening platform, that allows for high-throughput identification of compounds with activity against cardiac fibrosis. Our platform correctly identifies compounds acting on known cardiac fibrosis pathways. Moreover, it can detect anti-fibrotic activity for compounds acting on targets that have not previously been reported in in vitro cardiac fibrosis assays. Taken together, our experimental approach provides a powerful platform for high-throughput screening of anti-fibrotic compounds as well as discovery of novel targets to develop new therapeutic strategies for heart failure.
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Affiliation(s)
- G Palano
- Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Department of Medicine, Karolinska Institutet, Huddinge, Sweden
| | - M Jansson
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - A Backmark
- Discovery Biology, Discovery Sciences, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - S Martinsson
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - A Sabirsh
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - K Hultenby
- Clincal Research Center, Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
| | - P Åkerblad
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - K L Granberg
- Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - K Jennbacken
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - E Müllers
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden.
| | - E M Hansson
- Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Department of Medicine, Karolinska Institutet, Huddinge, Sweden.
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Erséus C, Klinth MJ, Rota E, De Wit P, Gustafsson DR, Martinsson S. The popular model annelid Enchytraeus albidus is only one species in a complex of seashore white worms (Clitellata, Enchytraeidae). ORG DIVERS EVOL 2019. [DOI: 10.1007/s13127-019-00402-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Martinsson S, Klinth MÅ, ErsÉus C. A new Scandinavian Chamaedrilus species (Clitellata: Enchytraeidae), with additional notes on others. Zootaxa 2018; 4521:417-429. [PMID: 30486156 DOI: 10.11646/zootaxa.4521.3.7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Indexed: 11/04/2022]
Abstract
Chamaedrilus (earlier referred to as Cognettia) is a well-known genus of terrestrial and limnic enchytraeids, currently with 19 known species in the world. Some of its species are morphologically cryptic and can only be identified using genetic (DNA) information. Many of them reproduce asexually, and the prevalence of sexual mature individuals is generally low in the populations. Chamaedrilus asloae sp. nov. (Clitellata: Enchytraeidae) is described based on material from two rivers in Norway, one in Sweden, and from a wet deciduous forest in Denmark. With the material at hand, no morphological characters completely separate C. asloae from C. chalupskyi; none of the available specimens of the new species are sexually mature. However, four molecular markers (two mitochondrial, two nuclear) support that C. asloae is a distinct, separately evolved lineage, which is sister to a clade consisting of C. glandulosus and C. varisetosus. In this study, too, the fully developed sexual organs of C. chalupskyi and C. varisetosus are described and illustrated.
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Affiliation(s)
- Svante Martinsson
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden..
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Martin P, Martinsson S, Wuillot J, Erséus C. Integrative species delimitation and phylogeny of the branchiate wormBranchiodrilus(Clitellata, Naididae). ZOOL SCR 2018. [DOI: 10.1111/zsc.12316] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Patrick Martin
- Royal Belgian Institute of Natural Sciences, OD Taxonomy and Phylogeny; Brussels Belgium
| | - Svante Martinsson
- Department of Biological and Environmental Sciences; University of Gothenburg; Göteborg Sweden
| | | | - Christer Erséus
- Department of Biological and Environmental Sciences; University of Gothenburg; Göteborg Sweden
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Rota E, Martinsson S, ErsÉus C, Petushkov VN, Rodionova NS, Omodeo P. Green light to an integrative view of Microscolex phosphoreus (Dugès, 1837) (Annelida: Clitellata: Acanthodrilidae). Zootaxa 2018; 4496:175-189. [PMID: 30313693 DOI: 10.11646/zootaxa.4496.1.13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Indexed: 11/04/2022]
Abstract
The small synanthropic and peregrine earthworm Microscolex phosphoreus (Dugès, 1837) is reported for the first time from Siberia. Morphological and DNA barcode (COI) analyses of this and widely separate samples worldwide demonstrate that, as currently identified, M. phosphoreus is a heterogeneous taxon, with divergent lineages occurring often in the same locality and hardly providing geographically structured genetic signals. The combined morphological and genetic evidence suggests that at least four of the found clades should be reclassified as separate species, both morphologically and genetically distinct from each other. However, as the specimen number was limited and only the COI gene was studied for the genetic work, we hesitate in formally describing new species. There would also be the problem of assigning the available names to specific lineages. Our findings encourage careful external and anatomical examination and using reliable characters such as the interchaetal distances and spermathecal morphology for correct identification and for deeper evaluation of cryptic diversity in this interesting bioluminescent worm.
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Affiliation(s)
- Emilia Rota
- Department of Physics, Earth and Environmental Sciences, University of Siena, Via P.A. Mattioli 4, IT-53100 Siena, Italy.
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Rota E, Martinsson S, Erséus C. Two new bioluminescent Henlea from Siberia and lack of molecular support for Hepatogaster (Annelida, Clitellata, Enchytraeidae). ORG DIVERS EVOL 2018. [DOI: 10.1007/s13127-018-0374-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Affiliation(s)
- Svante Martinsson
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Sweden
| | - Christer Erséus
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Sweden
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Liu Y, Fend SV, Martinsson S, Luo X, Ohtaka A, Erséus C. Multi-locus phylogenetic analysis of the genus Limnodrilus (Annelida: Clitellata: Naididae). Mol Phylogenet Evol 2017; 112:244-257. [DOI: 10.1016/j.ympev.2017.04.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 03/24/2017] [Accepted: 04/20/2017] [Indexed: 12/14/2022]
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Martinsson S, Erséus C. Cryptic speciation and limited hybridization within Lumbricus earthworms (Clitellata: Lumbricidae). Mol Phylogenet Evol 2017; 106:18-27. [DOI: 10.1016/j.ympev.2016.09.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/06/2016] [Accepted: 09/14/2016] [Indexed: 12/16/2022]
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Martinsson S, Dózsa-Farkas K, Rota E, Erséus C. Placing the forgotten: on the positions of Euenchytraeus and Chamaedrilus in an updated enchytraeid phylogeny (Clitellata : Enchytraeidae). INVERTEBR SYST 2017. [DOI: 10.1071/is16042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The phylogeny of Enchytraeidae was re-estimated to establish the relationships of the now resurrected Chamaedrilus and Euenchytraeus and to confirm their status as separate taxa. The former Cognettia (Enchytraeidae) was recently revised and split into its two senior synonyms, Chamaedrilus and Euenchytraeus, with the majority of the species transferred to Chamaedrilus. Euenchytraeus was re-established for three species sharing a unique anatomical trait, but has never before been represented in any phylogenetic study. We included representatives from 21 (of 33) valid enchytraeid genera and used three mitochondrial and four nuclear genes. The dataset (4164 base pairs) was analysed using multi-species coalescent (MSC) and maximum likelihood (ML) methods. Chamaedrilus (represented by eight species) and Euenchytraeus (represented by Eu. clarae) were found in a clade together with the monotypic Stercutus. Chamaedrilus was found to be monophyletic with maximum support in both analyses. The ML tree supported Euenchytraeus and Chamaedrilus as sister groups, whereas the MSC tree placed Euenchytraeus together with Stercutus, both with low support. A Bayes factor test weakly supported Euenchytraeus and Chamaedrilus as sister groups over Euenchytraeus+Stercutus. Possible morphological synapomorphies for these genera are discussed, and we conclude that Chamaedrilus and Euenchytraeus are closely related, but their status as separate genera is justified.
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Abarenkov K, Adams RI, Laszlo I, Agan A, Ambrosio E, Antonelli A, Bahram M, Bengtsson-Palme J, Bok G, Cangren P, Coimbra V, Coleine C, Gustafsson C, He J, Hofmann T, Kristiansson E, Larsson E, Larsson T, Liu Y, Martinsson S, Meyer W, Panova M, Pombubpa N, Ritter C, Ryberg M, Svantesson S, Scharn R, Svensson O, Töpel M, Unterseher M, Visagie C, Wurzbacher C, Taylor AF, Kõljalg U, Schriml L, Nilsson RH. Annotating public fungal ITS sequences from the built environment according to the MIxS-Built Environment standard – a report from a May 23-24, 2016 workshop (Gothenburg, Sweden). MycoKeys 2016. [DOI: 10.3897/mycokeys.16.10000] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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Affiliation(s)
- Mårten J. Klinth
- Department of Biological & Environmental Sciences; University of Gothenburg; P.O. Box 463 SE-405 30 Gothenburg Sweden
| | - Svante Martinsson
- Department of Biological & Environmental Sciences; University of Gothenburg; P.O. Box 463 SE-405 30 Gothenburg Sweden
| | - Christer Erséus
- Department of Biological & Environmental Sciences; University of Gothenburg; P.O. Box 463 SE-405 30 Gothenburg Sweden
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Rota E, Martinsson S, Bartoli M, Beylich A, Graefe U, Laini A, Wetzel MJ, Erséus C. Mitochondrial evidence supports a Nearctic origin for the spreading limicolous earthworm Sparganophilus tamesis Benham, 1892 (Clitellata, Sparganophilidae). Contrib Zool 2016. [DOI: 10.1163/18759866-08501005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We analysed samples of Sparganophilus taken at the corners of its distribution area in Europe (UK, Germany and Italy). No mitochondrial genetic divergence within and amongst them was found, neither in COI nor in 16S. Further, the COI haplotype was also identical to two sequences from Ontario, Canada in the Barcoding of Life Data System (BOLD) database. Our European COI and 16S sequences showed only minimal differentiation (only 1 or 2 substitutions) from specimens newly collected in Illinois and Washington states (USA), as well as from a COI haplotype from Tennessee (USA) in BOLD. An additional COI haplotype from Illinois (found in BOLD) is 2.1% different from the other haplotypes but clearly belongs to the same lineage of Sparganophilus . This geographically broad but genetically compact group fits the morphological diagnosis of S. tamesis Benham, 1892 as revised by Jamieson (1971) and is seen as evidence that all European populations 1) belong to the same species, 2) derive from a recent introduction, 3) are conspecific with the most widespread species of Sparganophilus in North America, and that 4) S. tamesis is a senior synonym of S. eiseni Smith, 1895. The single European haplotype does not refute the possibility of its spread from a single introduced source population.
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Affiliation(s)
- Emilia Rota
- 1 Department of Physics, Earth and Environmental Sciences University of Siena Via P.A. Mattioli 4 IT-53100 Siena Italy
- 6 E:mail:
| | - Svante Martinsson
- 2 Department of Biological and Environmental Sciences University of Gothenburg Box 463 SE-405 30 Göteborg Sweden
| | - Marco Bartoli
- 3 Department of Life Sciences University of Parma Parco Area delle Scienze 11/A IT-43124 Parma Italy
| | - Anneke Beylich
- 4 IFAB Institute for Applied Soil Biology Tornberg 24a 22337 Hamburg Germany
| | - Ulfert Graefe
- 4 IFAB Institute for Applied Soil Biology Tornberg 24a 22337 Hamburg Germany
| | - Alex Laini
- 3 Department of Life Sciences University of Parma Parco Area delle Scienze 11/A IT-43124 Parma Italy
| | - Mark J. Wetzel
- 5 Illinois Natural History Survey (INHS) Prairie Research Institute at the University of Illinois at Urbana-Champaign, Forbes Natural History Bldg. 1816 South Oak St. Champaign Illinois 61820 USA
| | - Christer Erséus
- 2 Department of Biological and Environmental Sciences University of Gothenburg Box 463 SE-405 30 Göteborg Sweden
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Torii T, Erséus C, Martinsson S, Ito M. Morphological and Genetic Characterization of the First Species of Thalassodrilides (Annelida: Clitellata: Naididae: Limnodriloidinae) from Japan. ACTA ACUST UNITED AC 2016. [DOI: 10.12782/sd.21.2.117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
| | - Christer Erséus
- University of Gothenburg, Department of Biological and Environmental Sciences
| | - Svante Martinsson
- University of Gothenburg, Department of Biological and Environmental Sciences
| | - Mana Ito
- National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research Agency
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Martinsson S, Rhodén C, Erséus C. Barcoding gap, but no support for cryptic speciation in the earthworm Aporrectodea longa (Clitellata: Lumbricidae). Mitochondrial DNA A DNA Mapp Seq Anal 2015; 28:147-155. [PMID: 26709635 DOI: 10.3109/19401736.2015.1115487] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
DNA-barcoding, using the mitochondrial marker COI, has been found successful for the identification of specimens in many animal groups, but may not be suited for species discovery and delimitation if used alone. In this study, we investigate whether two observed COI haplogroups in the earthworm Aporrectodea longa correspond to two cryptic species or if the variation is intraspecific. This is done by complementing COI with two nuclear markers, ITS2 and Histone 3. The variation is studied using distance methods, parsimony networks and Bayesian coalescent trees, and the statistical distinctness of the groups is tested on gene trees using the genealogical sorting index, Rosenberg's PAB and Rodrigo et al.'s P(RD). We also applied multilocus species delimitation based on the multispecies coalescence model. The two haplogroups were found in COI, and all tests except P(RD) found them to be significantly distinct. However, in ITS2, the same groups were not recovered in any analyses or tests. H3 was invariable in A. longa, and was, therefore, included only in the multilocus analysis, which preferred a model treating A. longa as one species over a model splitting it into two. We also compared two measurements of size, body length, and no. of segments between the groups. No difference in body length was found, and although a significant difference in no. of segments was noted the haplogroup with the lower mean showed both the highest and the lowest value. When combined, these results led us to the conclusion that there is no support for the separation of A. longa into two cryptic species. This study again highlights the importance of complementing mitochondrial barcodes with more data when establishing species boundaries.
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Affiliation(s)
- Svante Martinsson
- a Division of Systematics and Biodiversity, Department of Biological and Environmental Sciences , University of Gothenburg , Göteborg , Sweden
| | - Caroline Rhodén
- a Division of Systematics and Biodiversity, Department of Biological and Environmental Sciences , University of Gothenburg , Göteborg , Sweden
| | - Christer Erséus
- a Division of Systematics and Biodiversity, Department of Biological and Environmental Sciences , University of Gothenburg , Göteborg , Sweden
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Timm T, Arslan N, Rüzgar M, Martinsson S, Erséus C. Oligochaeta (Annelida) of the profundal of Lake Hazar (Turkey), with description of Potamothrix alatus hazaricus n. ssp.. Zootaxa 2015; 3716:144-56. [PMID: 26106770 DOI: 10.11646/zootaxa.3716.2.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Lake Hazar is an alkaline oligotrophic lake of tectonic origin, located in the Eastern Anatolia region in Turkey, 1248 a a.s.l. Its surface area is 80 km2, the average depth 93 m and maximum depth 205 m. The lake and its surroundings an under protection as a region of historical value. During the present study (2007-2012), samples were taken from 15 stations located at a depth of 2-200 m. Oligochaeta comprised 69% of the total invertebrate abundance. The profundal olgochaete fauna was found to consist of only three tubificid taxa, all of the subfamily Tubificinae. Potamothrix alatus hazaricus Timm & Arslan, n. ssp. was dominating anywhere down to maximum depths while Psammoryctides barbatus (Grube) and Ilyodrilus(?) sp. occurred seldom. All three are new records for Lake Hazar. Potamothrix alatus hazaricus shares the "winged" body shape in its genital region with the nominal, brackish-water subspecies P. a. alatus Finogenova, 1972, and the lateral position of the spermathecal pores and the shape of the ventral chaetae with the freshwater subspecies P. a. paravanicus Poddubnaja & Pataridze, 1989 known from Transcaucasian lakes. The mitochondrial COI barcoding gene suggests long separation between the two taxa, but the nuclear ITS region shows no variation. The generic position of Ilyodrilus (?) sp. remains obscure since its internal genitalia could not be studied.
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Affiliation(s)
- Tarmo Timm
- Estonian University of Life Sciences, Centrefor Limnology, 61117 Rannu, Tartumaa, Estonia.
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Martinsson S, Cui Y, Martin PJ, Pinder A, Quinlan K, Wetzel MJ, Erséus C. DNA-barcoding of invasive European earthworms (Clitellata: Lumbricidae) in south-western Australia. Biol Invasions 2015. [DOI: 10.1007/s10530-015-0910-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Martinsson S, Rota E, Erséus C. Corrigenda: Martinsson S, Rota E, Erséus C (2015) On the identity of Chamaedrilusglandulosus (Michaelsen, 1888) (Clitellata, Enchytraeidae), with the description of a new species. ZooKeys 501: 1-14. doi: 10.3897/zookeys.501.9279. Zookeys 2015:153-4. [PMID: 26019682 PMCID: PMC4443531 DOI: 10.3897/zookeys.504.9972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 05/13/2015] [Indexed: 11/23/2022] Open
Affiliation(s)
- Svante Martinsson
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
| | - Emilia Rota
- Department of Physics, Earth and Environmental Sciences, University of Siena, Via P.A. Mattioli 4, IT-53100 Siena, Italy
| | - Christer Erséus
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
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Martinsson S, Rota E, Erséus C. On the identity of Chamaedrilusglandulosus (Michaelsen, 1888) (Clitellata, Enchytraeidae), with the description of a new species. Zookeys 2015:1-14. [PMID: 25987876 PMCID: PMC4432316 DOI: 10.3897/zookeys.501.9279] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 03/26/2015] [Indexed: 11/30/2022] Open
Abstract
The taxonomy of Chamaedrilusglandulosus (Michaelsen, 1888) s. l., most commonly known previously as Cognettiaglandulosa, is revised. A recent molecular systematic study has shown that this taxon harbours two cryptic, but genetically well separated lineages, each warranting species status. In this study these two lineages are scrutinized morphologically, on the basis of Michaelsen’s type material as well as newly collected specimens from Central and Northern Europe. Chamaedrilusglandulosus s. s. is redescribed and Chamaedrilusvarisetosussp. n. is recognized as new to science. The two species are morphologically very similar, differing mainly in size, but seem to prefer different habitats, with Chamaedrilusglandulosus being a larger aquatic species, and Chamaedrilusvarisetosus being smaller and mainly found in moist to wet soil.
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Affiliation(s)
- Svante Martinsson
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
| | - Emilia Rota
- Department of Physics, Earth and Environmental Sciences, University of Siena, Via P.A. Mattioli 4, IT-53100 Siena, Italy
| | - Christer Erséus
- Systematics and Biodiversity, Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
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Martinsson S, Rota E, Erséus C. Revision ofCognettia(Clitellata, Enchytraeidae): re-establishment ofChamaedrilusand description of cryptic species in thesphagnetorumcomplex. SYST BIODIVERS 2014. [DOI: 10.1080/14772000.2014.986555] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Fazio P, Fitzer-Attas C, Mrzljak L, Martinsson S, Landwehrmeyer G, Bronzova J, Al-Tawil N, Halldin C, Sampaio C, Varrone A. E31 Positron Emission Tomography Imaging Of Phosphodiesterase 10 A Enzyme And Dopamine D2 Receptor In Huntington's Disease Gene Expansion Carriers. J Neurol Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wahlberg E, Baião GC, Häggqvist S, Martinsson S, Pistone D, Pape T. Ancistrocerus waldenii waldenii (Viereck 1906) (Hymenoptera: Vespidae, Eumeninae), a new addition to the fauna of Greenland. Zootaxa 2014; 3838:143-50. [PMID: 25081765 DOI: 10.11646/zootaxa.3838.1.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Indexed: 11/04/2022]
Abstract
Ancistrocerus waldenii waldenii (Viereck 1906) is newly recorded from West Greenland. This is a new northern limit for the species.
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Affiliation(s)
- Emma Wahlberg
- Department of Zoology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden, and Department of Zoology, Stockholm University, SE-106 91 Stockholm, Sweden;
| | - Guilherme C Baião
- Evolutionary Biology Centre, Uppsala University, Norbyvägen 14-18, SE-752 36 Uppsala, Sweden; unknown
| | - Sibylle Häggqvist
- Department of Zoology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden, and Department of Zoology, Stockholm University, SE-106 91 Stockholm, Sweden; unknown
| | - Svante Martinsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, SE-405 30 Gothenburg, Sweden; unknown
| | - Dario Pistone
- Natural History Museum, University Museum of Bergen, Postbox 7800, NO-5020 Bergen, Norway; unknown
| | - Thomas Pape
- Natural History Museum of Denmark, Universitetsparken 15, DK-2100 Copenhagen, Denmark; unknown
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Nilsson RH, Hyde KD, Pawłowska J, Ryberg M, Tedersoo L, Aas AB, Alias SA, Alves A, Anderson CL, Antonelli A, Arnold AE, Bahnmann B, Bahram M, Bengtsson-Palme J, Berlin A, Branco S, Chomnunti P, Dissanayake A, Drenkhan R, Friberg H, Frøslev TG, Halwachs B, Hartmann M, Henricot B, Jayawardena R, Jumpponen A, Kauserud H, Koskela S, Kulik T, Liimatainen K, Lindahl BD, Lindner D, Liu JK, Maharachchikumbura S, Manamgoda D, Martinsson S, Neves MA, Niskanen T, Nylinder S, Pereira OL, Pinho DB, Porter TM, Queloz V, Riit T, Sánchez-García M, de Sousa F, Stefańczyk E, Tadych M, Takamatsu S, Tian Q, Udayanga D, Unterseher M, Wang Z, Wikee S, Yan J, Larsson E, Larsson KH, Kõljalg U, Abarenkov K. Improving ITS sequence data for identification of plant pathogenic fungi. FUNGAL DIVERS 2014. [DOI: 10.1007/s13225-014-0291-8] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Martinsson S, Achurra A, Svensson M, Erséus C. Integrative taxonomy of the freshwater wormRhyacodrilus falciformiss.l. (Clitellata: Naididae), with the description of a new species. ZOOL SCR 2013. [DOI: 10.1111/zsc.12032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Svante Martinsson
- Department of Biological and Environmental Sciences; University of Gothenburg; Box 463; SE-405 30; Göteborg; Sweden
| | | | - Marcus Svensson
- Department of Biological and Environmental Sciences; University of Gothenburg; Box 463; SE-405 30; Göteborg; Sweden
| | - Christer Erséus
- Department of Biological and Environmental Sciences; University of Gothenburg; Box 463; SE-405 30; Göteborg; Sweden
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Martinsson S, Kjærandsen J. Katatopygia gen. n., a monophyletic branch segregated from Boletina (Diptera, Mycetophilidae). Zookeys 2012; 175:37-67. [PMID: 22451790 PMCID: PMC3307347 DOI: 10.3897/zookeys.175.2388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Accepted: 03/01/2012] [Indexed: 11/24/2022] Open
Abstract
The genus Katatopygiagen. n. is proposed for the Boletina erythropyga/punctus-group that was first introduced by Garrett (1924, 1925) and currently comprises eight described species. Molecular studies have strongly indicated that this group forms a monophyletic sister-group to a clade consisting of all other Boletina, Coelosia and Gnoriste, and its monophyly is supported by morphological data as well. The new genus includes the following species: Katatopygia antoma (Garrett, 1924), comb. n., Katatopygia antica (Garrett, 1924), comb. n., Katatopygia erythropyga (Holmgren, 1883), comb. n.,Katatopygia hissarica (Zaitzev & Polevoi, 2002), comb. n., Katatopygia magna (Garrett, 1925), comb. n., Katatopygia laticauda (Saigusa, 1968), comb. n., Katatopygia neoerythropyga (Zaitzev & Polevoi, 2002), comb. n. andKatatopygia sahlbergi (Lundström, 1906), comb. n., all transferred from Boletina. Katatopygia sahlbergi is found to be a senior synonym of Boletina punctus Garrett, 1925, syn. n. A phylogeny based on morphological data and using parsimony analysis yielded four most parsimonious trees where the new genus is retrieved as monophyletic with high support. Katatopygia neoerythropyga is found to be the sister-taxon to all other species that form two clades, one with Katatopygia sahlbergi-like species and one with Katatopygia erythropyga-like species. A key to males of Katatopygia is provided.
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Affiliation(s)
- Svante Martinsson
- Department of Zoology, University of Gothenburg, Box 463, SE-405 30 Göteborg, Sweden
| | - Jostein Kjærandsen
- Museum of Zoology, Department of Biology, Lund University, Helgonavägen 3, SE-223 62 Lund, Sweden
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Long YC, Barnes BR, Mahlapuu M, Steiler TL, Martinsson S, Leng Y, Wallberg-Henriksson H, Andersson L, Zierath JR. Role of AMP-activated protein kinase in the coordinated expression of genes controlling glucose and lipid metabolism in mouse white skeletal muscle. Diabetologia 2005; 48:2354-64. [PMID: 16237515 DOI: 10.1007/s00125-005-1962-5] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2005] [Accepted: 06/06/2005] [Indexed: 10/25/2022]
Abstract
AIMS/HYPOTHESIS AMP-activated protein kinase (AMPK) regulates metabolic adaptations in skeletal muscle. The aim of this study was to investigate whether AMPK modulates the expression of skeletal muscle genes that have been implicated in lipid and glucose metabolism under fed or fasting conditions. METHODS Two genetically modified animal models were used: AMPK gamma3 subunit knockout mice (Prkag3(-/-)) and skeletal muscle-specific transgenic mice (Tg-Prkag3(225Q)) that express a mutant (R225Q) gamma3 subunit. Levels of mRNA transcripts of genes involved in lipid and glucose metabolism in white gastrocnemius muscles of these mice (under fed or 16-h fasting conditions) were assessed by quantitative real-time PCR. RESULTS Wild-type mice displayed a coordinated increase in the transcription of skeletal muscle genes encoding proteins involved in lipid/oxidative metabolism (lipoprotein lipase, fatty acid transporter, carnitine palmitoyl transferase-1 and citrate synthase) and glucose metabolism (glycogen synthase and lactate dehydrogenase) in response to fasting. In contrast, these fasting-induced responses were impaired in Prkag3(-/-) mice. The transcription of genes involved in lipid and oxidative metabolism was increased in the skeletal muscle of Tg-Prkag3(225Q) mice compared with that in wild-type mice. Moreover, the expression of the genes encoding hexokinase II and 6-phosphofrucktokinase was decreased in Tg-Prkag3(225Q) mice after fasting. CONCLUSIONS/INTERPRETATION AMPK is involved in the coordinated transcription of genes critical for lipid and glucose metabolism in white glycolytic skeletal muscle.
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Affiliation(s)
- Y C Long
- Department of Surgical Sciences, Section for Integrative Physiology, Karolinska Institute, Stockholm, Sweden
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Affiliation(s)
- S Schmidt
- Department of Bioanalysis, Analytical and Pharmaceutical Research and Development, Astra Arcus AB, Södertälje, Sweden
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