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Martínez-Aquino A, García-Teh JG, Ceccarelli FS, Aguirre-Macedo ML, Vidal-Martínez VM. Integrative taxonomy of Serrasentis gibsoni n. sp. (Acanthocephala: Isthmosacanthidae) from flatfishes in the Gulf of Mexico. J Helminthol 2023; 97:e96. [PMID: 38073427 DOI: 10.1017/s0022149x23000822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
The Isthmosacanthidae acanthocephalan species of the genus Serrasentis are parasites of marine teleosts and an elasmobranch. In this study, Serrasentis gibsoni n. sp. is described from the intestines of four flatfish species (Paralichthyidae), namely Ancyclopsetta quadrocellata, Cyclopsetta chittendeni, Syacium gunteri, and S. papillosum from 10 oceanic sites in the Gulf of Mexico (GoM). Twenty sequences of the 'barcoding' region of cytochrome C oxidase subunit I gene were obtained from 20 adults of Serrasentis gibsoni n. sp. Additionally, five sequences of the barcoding region were obtained from five adults of rhadinorhynchid Gorgorhynchus lepidus from C. chittendeni, S. papillosum and one species of Haemulidae, Haemulom aurolineatum, from five oceanic sites from the GoM. Two phylogenetic approaches were followed: Bayesian inference and maximum likelihood. In both phylogenetic reconstructions, the sequences of Serrasentis gibsoni n. sp. were recovered as a monophyletic group within the genus Serrasentis and placed as a sister group to G. lepidus. However, due to the lack of molecular data for species of the Isthmosacanthidae and Rhadinorhynchidea, these phylogenetic inferences must be taken with caution. Serrasentis gibsoni n. sp. is the first species of Serrasentis described from Paralichthyidae flatfish species from marine waters of the Americas and from the GoM. Based on the barcoding data set analyzed, Serrasentis gibsoni n. sp. appears to have high intraspecific genetic variation; thus, it is necessary to continue exploring the genetic diversity of this species to infer its intraspecific evolutionary patterns.
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Affiliation(s)
- A Martínez-Aquino
- Laboratorio de Biología Evolutiva de Parásitos, Facultad de Ciencias, Universidad Autónoma de Baja California, Carretera Transpeninsular 3917, Fraccionamiento Playitas, Ensenada, Baja California, 22860, Mexico
| | - J G García-Teh
- Laboratorio de Patología Acuática, Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Mérida, Cordemex, Carretera Antigua a Progreso Km. 6, Mérida, Yucatán, 97310, Mexico
| | - F S Ceccarelli
- Departamento de Biología de la Conservación, Centro de Investigación Científica y de Educación Superior de Ensenada, Carretera Ensenada-Tijuana, Ensenada, Baja California, 22860, Mexico
| | - M L Aguirre-Macedo
- Laboratorio de Patología Acuática, Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Mérida, Cordemex, Carretera Antigua a Progreso Km. 6, Mérida, Yucatán, 97310, Mexico
| | - V M Vidal-Martínez
- Laboratorio de Patología Acuática, Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Mérida, Cordemex, Carretera Antigua a Progreso Km. 6, Mérida, Yucatán, 97310, Mexico
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Gorgorhynchoides pseudocarangis n. sp. (Acanthocephala: Isthmosacanthidae) from Pseudocaranx dentex (Carangidae) in southeast Queensland, Australia, with comments on the Isthmosacanthidae. Syst Parasitol 2021; 98:399-412. [PMID: 34050496 DOI: 10.1007/s11230-021-09985-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 05/20/2021] [Indexed: 10/21/2022]
Abstract
Gorgorhynchoides pseudocarangis n. sp. (Isthmosacanthidae), is described from the intestine of the white trevally Pseudocaranx dentex (Bloch & Schneider) (Carangiformes: Carangidae) collected in Moreton Bay, Queensland, Australia. The new species has a proboscis armature of 27-28 rows of 16-17 hooks. It is most similar morphologically to Gorgorhynchoides bullocki Cable & Marafachisi, 1970 and Gorgorhynchoides gnathanodontos Smales, 2014 but differs from the former in having a longer proboscis with more rows of hooks, ventral hooks 6/7-12 with notched tips and trunk spines which do not extend onto the anterior bulbous swelling, and from the latter in having a longer proboscis, ventral hooks 6/7-12 with notched tips, more circles of trunk spines, larger eggs and a proboscis armature with all hooks lacking manubria. Previous molecular phylogenetic analyses have shown that the genus Serrasentis Van Cleave, 1923 is sister to Gorgorhynchoides Cable & Linderoth, 1963, although some have failed to resolve these two lineages in separate monophyletic clades. We performed novel single-gene and concatenated phylogenetic analyses using cox1 mtDNA, 18S and 28S rDNA gene-sequences, resolving Gorgorhynchoides and Serrasentis in monophyletic sister clades and demonstrating that Gorgorhynchoides pseudocarangis n. sp. is phylogenetically distinct from related species for which molecular sequence data are available. We view the previous amendment of the Isthmosacanthidae to include the genera Golvanorhynchus Noronha, Fabio & Pinto, 1987, Gorgorhynchoides, Isthmosacanthus Smales 2014 and Serrasentis, and the transfer of the family to the Polymorphida, as the most satisfactory classification at present, although additional molecular evidence would provide greater stability.
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The Molecular Phylogeny of Pararhadinorhynchus magnus Ha, Amin, Ngo, Heckmann, 2018 (Acanthocephala: Rhadinorhynchidae) from Scatophagus argus (Linn.) (Scatophagidae) in Vietnam. Acta Parasitol 2020; 65:610-619. [PMID: 32207055 DOI: 10.2478/s11686-020-00191-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 02/19/2020] [Indexed: 11/20/2022]
Abstract
PURPOSE The molecular profile of Pararhadinorhynchus magnus Ha, Amin, Ngo, Heckmann, 2018 described from Scatophagus argus (Linn.) off Haiphong in the Gulf of Tonkin, Pacific Ocean, Vietnam is provided for the first time. It was morphologically distinguished from the South Australian species, Pararhadinorhynchus mugilis Johnston and Edmonds, 1947 and Pararhadinorhynchus coorongensis Edmonds, 1973 from mullets. Two other species of Pararhadinorhynchus are also recognized: Pararhadinorhynchus upenei Wang, Wang, Wu, 1993 from China and Pararhadinorhynchus sodwanensis Lisitsyna, Kudlai, Cribb and Smit, 2019 from South Africa. The assignment of Diplosentis manteri Gupta and Fatma, 1980 to Pararhadinorhynchus is not recognized. METHODS Sequences of the 18S, small internal transcribed spacers (ITS1-5.8S-ITS2) and 28S from nuclear DNA were generated to molecularly characterize P. magnus. The phylogenetic analyses were achieved by comparison of the 18S and ITS1-5.8S-ITS2 region only as the 28S amplified a short region (425-428 bp) that was not sufficient for the present study. RESULTS Phylogenetic analyses showed that P. magnus and the other species of Pararhadinorhynchus sequenced were nested within separate clades in the case of 18S gene and suggesting that these species do not share a common ancestor. In contrast, the ITS1-5.8S-ITS2 region shows a close arrangement of species of Pararhadinorhynchus with molecular affinities to the family Diplosentidae, suggesting that final placement of these species in Transvenidae needs further study and revision. CONCLUSIONS The molecular data from the present study will provide further comparative insights into species of Pararhadinorhynchus and its close affiliation to other acanthocephalan species and genera from different geographical areas.
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Proposal of Spinulacorpus biforme (Smales, 2014) n. g., n. comb. and the Spinulacorpidae n. fam. to resolve paraphyly of the acanthocephalan family Rhadinorhynchidae Lühe, 1912. Syst Parasitol 2020; 97:477-490. [DOI: 10.1007/s11230-020-09923-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/20/2020] [Indexed: 01/01/2023]
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Amin OM, Heckmann RA, Dallarés S, Constenla M, Van Ha N. Morphological and Molecular Description of Rhadinorhynchus hiansi Soota and Bhattacharya, 1981 (Acanthocephala: Rhadinorhynchidae) from Marine Fish off the Pacific Coast of Vietnam. J Parasitol 2020. [DOI: 10.1645/19-97] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Omar M. Amin
- Institute of Parasitic Diseases, 11445 E. Via Linda 2-419, Scottsdale, Arizona 85259
| | - Richard A. Heckmann
- Department of Biology, Brigham Young University, 1114 MLBM, Provo, Utah 84602
| | - Sara Dallarés
- Department of Animal Biology, Plant Biology and Ecology, Universitat Autònoma de Barcelona, Cerdanyola, 08193 Barcelona, Spain
| | - María Constenla
- Department of Animal Biology, Plant Biology and Ecology, Universitat Autònoma de Barcelona, Cerdanyola, 08193 Barcelona, Spain
| | - Nguyen Van Ha
- Department of Parasitology, Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
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Huston DC, Cribb TH, Smales LR. Molecular characterisation of acanthocephalans from Australian marine teleosts: proposal of a new family, synonymy of another and transfer of taxa between orders. Syst Parasitol 2020; 97:1-23. [PMID: 31912420 DOI: 10.1007/s11230-019-09896-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 12/10/2019] [Indexed: 10/25/2022]
Abstract
We provide molecular data (cox1, 18S rDNA and 28S rDNA) for 17 acanthocephalan species and 20 host-parasite combinations from Australian marine teleosts collected from off Queensland, Australia. Fourteen of these acanthocephalans are characterised with molecular data for the first time and we provide the first molecular data for a species of each of the genera Heterosentis Van Cleave, 1931, Pyriproboscis Amin, Abdullah & Mhaisen, 2003 and Sclerocollum Schmidt & Paperna, 1978. Using 18S and 28S rDNA sequences, the phylogenetic position of each newly sequenced species is assessed with both single-gene and concatenated 18S+28S maximum likelihood and Bayesian inference analyses. Additional phylogenetic analyses focusing on the genus Rhadinorhynchus Lühe, 1912 and related lineages are included. Our phylogenetic results are broadly consistent with previous analyses, recovering previously identified inconsistencies but also providing new insights and necessitating taxonomic action. We do not find sufficient evidence to recognise the Gymnorhadinorhynchidae Braicovich, Lanfranchi, Farber, Marvaldi, Luque & Timi, 2014 as distinct from the Rhadinorhynchidae Lühe, 1912. The family Gymnorhadinorhynchidae and its sole genus, Gymnorhadinorhynchus Braicovich, Lanfranchi, Farber, Marvaldi, Luque & Timi, 2014, are here recognised as junior synonyms of Rhadinorhynchidae and Rhadinorhynchus, respectively. The two species currently assigned to Gymnorhadinorhynchus are recombined as Rhadinorhynchus decapteri (Braicovich, Lanfranchi, Farber, Marvaldi, Luque & Timi, 2014) n. comb. and Rhadinorhynchus mariserpentis (Steinauer, Garcia-Vedrenne, Weinstein & Kuris, 2019) n. comb. In all of our analyses, Rhadinorhynchus biformis Smales, 2014 is found basal to the Rhadinorhynchidae + Transvenidae Pichelin & Cribb, 2001, thus resulting in a paraphyletic Rhadinorhynchidae. It appears that R. biformis may require a new genus and family; however, morphological data for this species are currently insufficient to adequately distinguish it from related lineages, thus we defer the proposal of any new higher-rank names for this species. Species of the genus Sclerocollum, currently assigned to the Cavisomidae Meyer, 1932, are found nested within the family Transvenidae. We transfer the genus Sclerocollum to the Transvenidae and amend the diagnosis of the family accordingly. The genera Gorgorhynchoides Cable & Linderoth, 1963 and Serrasentis Van Cleave, 1923, currently assigned to the Rhadinorhynchidae, are supported as sister taxa and form a clade in the Polymorphida. We transfer these genera and Golvanorhynchus Noronha, Fabio & Pinto, 1978 to an emended concept of the Isthomosacanthidae Smales, 2012 and transfer this family to the Polymorphida. Lastly, Pyriproboscis heronensis (Pichelin, 1997) Amin, Abdullah & Mhaisen, 2003, currently assigned to the Pomphorhynchidae Yamaguti, 1939, falls under the Polymorphida in our analyses with some support for a sister relationship with the Centrorhynchidae Van Cleave, 1916. As this species clearly does not belong in the Pomphorhynchidae and is morphologically and molecularly distinct from the lineages of the Polymorphida, we propose the Pyriprobosicidae n. fam. to accommodate it.
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Affiliation(s)
- Daniel C Huston
- Institute for Marine and Antarctic Studies, The University of Tasmania, Hobart, TAS, 7001, Australia.
| | - Thomas H Cribb
- School of Biological Sciences, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Lesley R Smales
- Parasitology Section, South Australian Museum, Adelaide, SA, 5000, Australia
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Lisitsyna OI, Kudlai O, Cribb TH, Smit NJ. Three new species of acanthocephalans (Palaeacanthocephala) from marine fishes collected off the East Coast of South Africa. Folia Parasitol (Praha) 2019; 66. [PMID: 31558687 DOI: 10.14411/fp.2019.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 06/20/2019] [Indexed: 11/19/2022]
Abstract
Three new species of acanthocephalans are described from marine fishes collected in Sodwana Bay, South Africa: Rhadinorhynchus gerberi n. sp. from Trachinotus botla (Shaw), Pararhadinorhynchus sodwanensis n. sp. from Pomadasys furcatus (Bloch et Schneider) and Transvena pichelinae n. sp. from Thalassoma purpureum (Forsskål). Transvena pichelinae n. sp. differs from the single existing species of the genus Transvena annulospinosa Pichelin et Cribb, 2001, by the lower number of longitudinal rows of hooks (10-12 vs 12-14, respectively) and fewer hooks in a row (5 vs 6-8), shorter blades of anterior hooks (55-63 vs 98), more posterior location of the ganglion (close to the posterior margin of the proboscis receptacle vs mid-level of the proboscis receptacle) and smaller eggs (50-58 × 13 µm vs 62-66 × 13-19 µm). Pararhadinorhynchus sodwanensis n. sp. differs from all known species of the genus by a combination of characters. It closely resembles unidentified species Pararhadinorhynchus sp. sensu Weaver and Smales (2014) in the presence of a similar number of longitudinal rows of hooks on the proboscis (16-18 vs 18) and hooks in a row (11-13 vs 13-14), but differs in the position of the lemnisci (extend to the level of the posterior end of the proboscis receptacle or slightly posterior vs extend to the mid-level of the receptacle), length of the proboscis receptacle (910-1180 µm vs 1,460 µm) and cement glands (870-880 µm vs 335-350 µm). Rhadinorhynchus gerberi n. sp. is distinguishable from all its congeners by a single field of 19-26 irregular circular rows of the tegumental spines on the anterior part of the trunk, 10 longitudinal rows of hooks on the proboscis with 29-32 hooks in each row, subterminal genital pore in both sexes, and distinct separation of the opening of the genital pore from the posterior edge of the trunk (240-480 μm) in females. Sequences for the 18S rDNA, 28S rDNA and cox1 genes were generated to molecularly characterise the species and assess their phylogenetic position. This study provides the first report based on molecular evidence for the presence of species of Transvena Pichelin et Cribb, 2001 and Pararhadinorhynchus Johnston et Edmonds, 1947 in African coastal fishes.
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Affiliation(s)
- Olga I Lisitsyna
- I. I. Schmalhausen Institute of Zoology, NAS of Ukraine, Kyiv, Ukraine
| | - Olena Kudlai
- Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa.,Institute of Ecology, Nature Research Centre, Vilnius, Lithuania
| | - Thomas H Cribb
- The University of Queensland, School of Biological Sciences, St Lucia, Queensland, Australia
| | - Nico J Smit
- Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
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Amin OM, Heckmann RA, Dallarés S, Constenla M, Ha NV. Morphological and molecular description of Rhadinorhynchus laterospinosus Amin, Heckmann & Ha, 2011 (Acanthocephala, Rhadinorhynchidae) from marine fish off the Pacific coast of Vietnam. ACTA ACUST UNITED AC 2019; 26:14. [PMID: 30838975 PMCID: PMC6402367 DOI: 10.1051/parasite/2019015] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 02/27/2019] [Indexed: 12/03/2022]
Abstract
Rhadinorhynchus laterospinosus Amin, Heckmann & Ha, 2011 (Rhadinorhynchidae) was described from a single female collected from a trigger fish, Balistes sp. (Balistidae) from the northern Pacific coast of Vietnam in Halong Bay, Gulf of Tonkin. More recent collections of fishes in 2016 and 2017 revealed wider host and geographical distributions. We report this Acanthocephala from nine species of fish representing six families (including the original record from Balistes sp.) along the whole Pacific coast of Vietnam. The fish species are Alectis ciliaris (Carangidae), Auxis rochei (Scombridae), Auxis thazard (Scombridae), Leiognathus equulus (Leiognathidae), Lutjanus bitaeniatus (Lutjanidae), Megalaspis cordyla (Carangidae), Nuchequula flavaxilla (Leiognathidae), and Tylosurus sp. (Belonidae). We provide a complete description of males and females of R. laterospinosus, discuss its hook metal microanalysis using EDAX, and its micropores. Specimens of this species characteristically have lateral trunk spines bridging the anterior ring of spines with posterior field of ventral spines and a proboscis with 15–19 longitudinal alternating rows of 21–26 hooks each varying with host species. We demonstrate the effect of host species on the distribution and size of the trunk, proboscis, proboscis hooks, trunk spines, and reproductive structures. The molecular profile of this acanthocephalan, based on 18S rDNA and cox1 genes, groups with other Rhadinorhynchus species and further seems to confirm the paraphyly of the genus, which is discussed.
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Affiliation(s)
- Omar Mohamed Amin
- Institute of Parasitic Diseases, 11445 E. Via Linda 2-419, Scottsdale, AZ 85259, USA
| | | | - Sara Dallarés
- Department of Animal Biology, Vegetal Biology and Ecology, Universitat Autònoma de Barcelona, Cerdanyola, 08193 Barcelona, Spain
| | - María Constenla
- Department of Animal Biology, Vegetal Biology and Ecology, Universitat Autònoma de Barcelona, Cerdanyola, 08193 Barcelona, Spain
| | - Nguyen Van Ha
- Department of Parasitology, Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
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Lozano-Cobo H, Gómez-Gutiérrez J, Franco-Gordo C, Prado-Rosas MDCGD. The discovery of acanthocephalans parasitizing chaetognaths. Acta Parasitol 2017; 62:401-411. [PMID: 28426423 DOI: 10.1515/ap-2017-0048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 01/23/2017] [Indexed: 11/15/2022]
Abstract
A comprehensive literature review shows that 12 types of pathogens, micropredators and parasites are reported to interact with chaetognaths, mostly digenean trematodes, cestodes and nematodes larval stages. Through analysis of 78,152 chaetognaths from a monthly zooplankton time series (Jan 1996-Dec 1998) collected in the Mexican Central Pacific twelve acanthocephalan larvae parasitizing chaetognaths were discovered. This is the first record of an acanthocephalan parasitizing chaetognaths, raising to 13 the types of symbionts known to interact with them (excluding predators). Cystacanth larval specimens of Corynosoma sp. (Polymorphidae) were observed parasitizing the head, trunk and caudal cavities of three of the eight chaetognath species inhabiting this tropical coastal region (Flaccisagitta enflata, Flaccisagitta hexaptera and Zonosagitta bedoti). Because Corynosoma sp. parasitized chaetognaths during different months and years (Jan-Feb 1996, Mar and Jul 1997, Jan, Jun, Aug-Sep 1998) and because the total length of these cystacanths varied between 165-480 µm, suggesting growth inside the hosts, we conclude that chaetognaths are intermediate hosts of Corynosoma sp. The twelve parasitized chaetognaths were juveniles (without gonads) or immature adults (none in reproductively mature stage IV); therefore Corynosoma may have a negative influence on host reproduction. Marine crustaceans (amphipods, decapods, copepods, mysids and euphausiids) and fishes are common intermediate or paratenic hosts of acanthocephalans. Fish, sea birds and marine mammals are definitive hosts for marine Corynosoma species. The present discovery implies that acanthocephalans are transmitted trophically through different intermediate hosts (crustaceans, chaetognaths and/or fish); thus chaetognaths can also be part of the marine acanthocephalan life cycle.
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Affiliation(s)
- Horacio Lozano-Cobo
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Departamento de Plancton y Ecología Marina. Av. IPN s/n, CP 23096, La Paz, Baja California Sur
| | - Jaime Gómez-Gutiérrez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Departamento de Plancton y Ecología Marina. Av. IPN s/n, CP 23096, La Paz, Baja California Sur
| | - Carmen Franco-Gordo
- Centro de Ecología Costera, Universidad de Guadalajara, Gómez Farías 82, CP 48980, San Patricio Melaque, Jalisco
| | - María Del Carmen Gómez Del Prado-Rosas
- Laboratorio de Parasitología, Departamento Académico de Biología Marina, Universidad Autónoma de Baja California Sur, CP 23080, La Paz, Baja California Sur
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Lozano-Cobo H, Prado-Rosas MDCGD, Sánchez-Velasco L, Gómez-Gutiérrez J. Seasonal variation in chaetognath and parasite species assemblages along the northeastern coast of the Yucatan Peninsula. DISEASES OF AQUATIC ORGANISMS 2017; 124:55-75. [PMID: 28357986 DOI: 10.3354/dao03106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Chaetognaths are abundant carnivores with broad distributions that are intermediate hosts of trophically transmitted parasites. Monthly variations in chaetognath and parasite species distributions, abundance, prevalence, and intensity related to seasonal environmental changes were recorded in 2004 and 2005 in Laguna Nichupté, a coral reef, and the adjoining continental shelf of Quintana Roo, Mexico. Of 12 chaetognath species plus Sagitta spp., only 5 (Ferosagitta hispida, Flaccisagitta enflata, Sagitta spp., Serratosagitta serratodentata, and Pterosagitta draco) were parasitized. These species were parasitized with 33 types of flatworms and unidentified cysts (likely protozoan ciliates), having an overall mean prevalence of 6%. Digenean metacercaria larvae numerically dominated the parasite assemblages. Cluster analysis defined 2 chaetognath species assemblages. One included 7 species inside Laguna Nichupté, where F. hispida was numerically dominant (98.9%); the other contained 13 chaetognath species in the continental shelf-coral reef region, where F. enflata was abundant (53%). Canonical correspondence analysis showed that Laguna Nichupté had highly variable and hostile conditions (relatively low salinity and high temperature) for chaetognath species except for F. hispida. The higher density of F. hispida promoted greater parasite diversity (23 types), dominated by Brachyphallus sp. metacercariae. F. enflata prevailed in the continental shelf-coral reef area, which had stable high salinity and relatively low temperature. Monilicaecum and unidentified digenean 'type g' infected 5 chaetognath species on the continental shelf. Distinct primary hosts (mollusks and copepods) and contrasting environmental conditions (salinity, dissolved oxygen concentration, and temperature) between Laguna Nichupté and the continental shelf promoted distinct chaetognath species assemblages, resulting in distinct parasite diversity and prevalence patterns.
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Affiliation(s)
- Horacio Lozano-Cobo
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Departamento de Plancton y Ecología Marina, Av. IPN s/n, La Paz, BCS 23096, Mexico
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Morphological and molecular description of Tenuisentis niloticus (Meyer, 1932) (Acanthocephala: Tenuisentidae) from Heterotis niloticus (Cuvier) (Actinopterygii: Arapaimidae), in Burkina Faso, with emendation of the family diagnosis and notes on new features, cryptic genetic diversity and histopathology. Syst Parasitol 2016; 93:173-91. [PMID: 26790681 DOI: 10.1007/s11230-015-9615-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 11/02/2015] [Indexed: 10/22/2022]
Abstract
Specimens described as Rhadinorhynchus niloticus Meyer, 1932 (Rhadinorhynchidae) from two male specimens collected from Heterotis niloticus (Cuvier) in the Egyptian Nile were later redescribed in the genus Tenuisentis Van Cleave, 1936 (Tenuisentidae) based on 12 specimens collected from the same host species in the White Nile. That redescription basically distinguished the two genera based on five traits but did not actually provide a formal description. His account left out information about cerebral ganglion, lemnisci, some reproductive structures, eggs, proboscis hook dissymmetry and roots, size of trunk and a few other structures. We provide (i) the first complete description of this species enhanced by SEM, molecular, and histo-pathological studies; (ii) expand the existing descriptions; (iii) correct questionable accounts advanced by Van Cleave on the cement gland and the hypodermal giant nuclei; and (iv) add descriptions of new features such as the para-receptacle structure which we also report from Paratenuisentis Bullock & Samuel, 1975, the only other genus in Tenuisentidae Van Cleave, 1936. The subsequent description of a few more specimens from the same host collected in Mali was more informative yet incomplete and at variance with our specimens from Burkina Faso. Genetic divergence and phylogenetic analyses of mitochondrial (cytochrome oxidase c subunit I; COI) and nuclear (18S ribosomal RNA) gene relationships uncovered a cryptic species complex containing two lineages. Based on our studies, the family diagnosis is emended. The acanthocephalan causes damage to the host intestine as depicted in histopathological sections. The invading worm can extend from the mucosal layer to the muscularis externa of the host with subsequent tissue necrosis, villi compression, haemorrhaging and blood loss.
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Morales-Ávila JR, Gómez-Gutiérrez J, del Carmen Gómez del Prado-Rosas M, Robinson CJ. Larval trematodes Paronatrema mantae and Copiatestes sp. parasitize Gulf of California krill (Nyctiphanes simplex, Nematoscelis difficilis). DISEASES OF AQUATIC ORGANISMS 2015; 116:23-35. [PMID: 26378405 DOI: 10.3354/dao02901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
During 4 quantitative-systematic oceanographic cruises at 99 sampling stations in the Gulf of California (January and July 2007, August 2012, and June 2013), we found 2 trematode species (non-encysted mesocercaria stage) parasitizing the hemocoel of 2 krill species at near-shore locations. Copiatestes sp. parasitized Nematoscelis difficilis in January 2007, and Paronatrema mantae parasitized Nyctiphanes simplex in July 2007. Both trematode species had an intensity of 1 parasite per host. This is the first endoparasite known for N. difficilis, the first record of P. mantae infecting zooplankton, and the first confirmed trematode parasitizing krill species in the Gulf of California. We provide quantitative evidence that these 2 trematode species infect krill with considerably low station prevalence (0.03-0.16%) and low population abundances (<1.2 trematodes 1000 m(-3)). A review of trematodes parasitizing krill indicates that syncoeliid trematodes also have (with few exceptions) low population densities and prevalence and lower species diversity than previously thought (suggesting a broader zoogeographic distribution range of these parasites). Due to the low host specificity of syncoeliid trematodes that typically infect more than 1 secondary intermediate host species in their complex life cycle, we propose that N. simplex and N. difficilis are intermediate hosts (although non-conspicuous) for the transmission of syncoeliid trematodes in the Gulf of California.
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Affiliation(s)
- José Raúl Morales-Ávila
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Departamento de Plancton y Ecología Marina (CICIMAR), Avenida IPN s/n, La Paz, Baja California Sur 23096, Mexico
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Bao M, Roura A, Mota M, Nachón D, Antunes C, Cobo F, MacKenzie K, Pascual S. Macroparasites of allis shad (Alosa alosa) and twaite shad (Alosa fallax) of the Western Iberian Peninsula Rivers: ecological, phylogenetic and zoonotic insights. Parasitol Res 2015; 114:3721-39. [DOI: 10.1007/s00436-015-4601-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 06/18/2015] [Indexed: 10/23/2022]
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Gregori M, Fernández-Leborans G, Roura Á, González ÁF, Pascual S. Description of a new epibiotic relationship (Suctorian-Copepoda) in NE Atlantic waters: from morphological to phylogenetic analyses. ACTA ZOOL-STOCKHOLM 2015. [DOI: 10.1111/azo.12113] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maria Gregori
- Marine Ecology and Biodiversity Department; Instituto de Investigaciones Marinas (CSIC); Eduardo Cabello s/n Vigo 36208 Spain
| | | | - Álvaro Roura
- Department of Genetics; La Trobe Institute for Molecular Science; Kingsbury Drive, Bundoora 3086 Melbourne VIC Australia
| | - Ángel F. González
- Marine Ecology and Biodiversity Department; Instituto de Investigaciones Marinas (CSIC); Eduardo Cabello s/n Vigo 36208 Spain
| | - Santiago Pascual
- Marine Ecology and Biodiversity Department; Instituto de Investigaciones Marinas (CSIC); Eduardo Cabello s/n Vigo 36208 Spain
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Gregori M, Roura Á, Abollo E, González ÁF, Pascual S. Anisakis simplexcomplex (Nematoda: Anisakidae) in zooplankton communities from temperate NE Atlantic waters. J NAT HIST 2015. [DOI: 10.1080/00222933.2014.979260] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kuris AM, Jaramillo AG, McLaughlin JP, Weinstein SB, Garcia-Vedrenne AE, Poinar GO, Pickering M, Steinauer ML, Espinoza M, Ashford JE, Dunn GLP. Monsters of the sea serpent: parasites of an oarfish, Regalecus russellii. J Parasitol 2014; 101:41-4. [PMID: 25220829 DOI: 10.1645/14-581.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Examination of a small portion of the viscera of an oarfish ( Regalecus russellii ) recovered from Santa Catalina Island, southern California, revealed numerous tetraphyllidean tapeworm plerocercoids, Clistobothrium cf. montaukensis; 2 juvenile nematodes, Contracaecum sp.; and a fragment of an adult acanthocephalan, family Arhythmacanthidae. This suggests that the fish was relatively heavily parasitized. The presence of larval and juvenile worms suggests that oarfish are preyed upon by deep-swimming predators such as the shortfin mako shark, Isurus oxyrinchus , known to be a definitive host for the adult tapeworm, and also by diving mammals such as sperm whales, Physeter catodon L., hosts of Contracaecum spp. nematodes.
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Affiliation(s)
- Armand M Kuris
- Department of Ecology, Evolution, and Marine Biology and Marine Science Institute, University of California, Santa Barbara, California 93106
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