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Hao CL, Zhang WR, Arken K, Wang JP, Shi CX, Zhang L, Yue C. Identification of a new species of Gyrodactylus von Nordmann, 1832 (Monogenoidea Gyrodactylidae) isolated from Diptychus maculatus in Yarkand River, Xinjiang, China. Int J Parasitol Parasites Wildl 2024; 24:100949. [PMID: 38873216 PMCID: PMC11170355 DOI: 10.1016/j.ijppaw.2024.100949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 05/25/2024] [Accepted: 05/25/2024] [Indexed: 06/15/2024]
Abstract
To investigate Gyrodactylus infection of fish in the river system of Xinjiang (China), Gyrodactylus individuals were isolated from specimens of Diptychus maculatus. Morphological characterization and phylogenetic analysis based on ITS1-5.8S-ITS2 rDNA locus revealed that the gyrodactylids belong to new species. Gyrodactylus diptychi n. sp. differs significantly in the morphology of the haptoral structures from 12 known species of Gyrodactylus found in fishes of the subfamily Schizothoracinae. In particular, G. diptychi n. sp. has a relatively short dorsal bar with thick and large ends, flat and straight hamuli roots, and small ventral bar processes. Furthermore, G. diptychi n. sp. is the only representative of Gyrodactylus found on D. maculatus. Using the BLASTn search of ITS1-5.8S-ITS2 rDNA sequences in GenBank and the Bayesian Information and Maximum Likelihood methods, we constructed phylogenetic trees for G. diptychi n. sp. As a result, our studies clearly identified that G. diptychi n. sp. was the first Gyrodactylus monogenean isolated from D. maculatus and a new species belonged to the subgenus Limnonephrotus.
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Affiliation(s)
- Cui-lan Hao
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
- Xinjiang Key Laboratory of New Drug Study and Creation for Herbivorous Animals, Urumqi, 830052, Xinjiang, China
| | - Wen-run Zhang
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Kadirden Arken
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Jin-pu Wang
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Cai-xia Shi
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Li Zhang
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Cheng Yue
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
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Fujiwara T, Kawano KM, Sonoda M, Shimizu N, Sawayama E, Yanagida T. First report of Pleistophora hyphessobryconis infection in medaka Oryzias latipes, an important ornamental and laboratory fish in Japan. Parasitol Int 2024; 98:102825. [PMID: 37981261 DOI: 10.1016/j.parint.2023.102825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/23/2023] [Accepted: 11/12/2023] [Indexed: 11/21/2023]
Abstract
Medaka Oryzias latipes is a small freshwater fish widely distributed in Japan. It is a popular ornamental fish and now has been recognized as an important model organism in many areas of biological research. Here we report microsporidian infections for the first time in medaka, from 2 research facilities and a wild population. Infected medaka exhibited abnormal appearance with whitish trunk muscle, and microsporidian spores were detected from the affected tissue. The size of spores was similar in all the three cases: 7.0 μm in length and 3.7-4.2 μm in width. In the histological observation, numerous sporophorous vesicles containing spores or other developmental stages were observed within the myocytes of the trunk muscle. Nucleotide sequence of the ribosomal RNA gene was determined and it was identical among all three cases. A BLAST search revealed it shared 99.5-99.6% identity with Pleistophora hyphessobryconis, a microsporidian known to infect >20 freshwater fish species. Light microscopic observation of spores and histological features also indicated the microsporidian infection in medaka is caused by P. hyphessobryconis. This is the first record of the microsporidian species from medaka and from Japan.
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Affiliation(s)
- Takuto Fujiwara
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Karina Midori Kawano
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Misaki Sonoda
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Nodoka Shimizu
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Eitaro Sawayama
- Department of Marine Science, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Tetsuya Yanagida
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan; Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan.
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Zhang WR, Hao CL, Arken K, Rong MJ, Tian SL, Kadir M, Yue C. New species of Gyrodactylus von Nordmann, 1832 (Monogenoidea: Gyrodactylidae) from Gymnodiptychus dybowskii (Kessler, 1874) (Schizothoracinae) in the Kunes River (Yili River basin), China. Int J Parasitol Parasites Wildl 2023; 22:136-145. [PMID: 37869061 PMCID: PMC10587675 DOI: 10.1016/j.ijppaw.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 10/02/2023] [Accepted: 10/02/2023] [Indexed: 10/24/2023]
Abstract
Yili River system hosts a diverse fauna of fishes and parasites. Gymnodiptychus dybowskii is a rare and endangered aboriginal cold-water fish inhabit in the Yili river system. Our research identified a new species Gyrodactylus gymnodiptychi n. sp. isolated from G. dybowskii in the Kunes River (Yili River, China). Morphological comparison revealed identifiable differences between the new species and other parasites, including Gyrodactylus aksuensis, and Gyrodactylus tokobaevi, which are two known parasites living in G. dybowskii inhabit in the Aksu River west of Frunze (Kyrgyzstan), as well as Gyrodactylus montanus living in Shizothorax intermedius inhabited in the Tadzhikistan or Uzbekistan. Especially, the dorsal bar of G. gymnodiptychi n. sp. was raised at both ends with a hollow, and its hamulus roots were curved inward. The BLASTN search of GenBank did not detect any other ITS1-5.8S-ITS2 rDNA sequences same as G. gymnodiptychi's. Using the Bayesian Information and Maximum Likelihood methods to analyze the ITS1-5.8S-ITS2 rDNA gene sequences, we constructed phylogenetic trees for G. gymnodiptychi n. sp. Accordingly, our morphological and molecular research indicated that G. gymnodiptychi n. sp. was not only a new species of parasites but also the first Gyrodactylus member identified in the Yili River in China.
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Affiliation(s)
| | | | - Kadirden Arken
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Meng-Jie Rong
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Sheng-Li Tian
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Munira Kadir
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
| | - Cheng Yue
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China
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Nejat F, Benovics M, Řehulková E, Vukić J, Šanda R, Kaya C, Tarkan AS, Abdoli A, Aksu S, Šimková A. Diversity, phylogeny and intraspecific variability of Paradiplozoon species (Monogenea: Diplozoidae) parasitizing endemic cyprinoids in the Middle East. Parasitology 2023; 150:705-722. [PMID: 37157105 PMCID: PMC10410381 DOI: 10.1017/s0031182023000446] [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] [Received: 11/25/2022] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 05/10/2023]
Abstract
Diplozoidae are common monogenean ectoparasites of cyprinoid fish, with the genus Paradiplozoon being the most diversified. Despite recent studies on Diplozoidae from Europe, Africa and Asia, the diversity, distribution and phylogeny of this parasite group appears to be still underestimated in the Middle East. The objective of this study was to investigate the diversity, endemism and host specificity of diplozoids parasitizing cyprinoid fish from the Middle East, considering this region as an important historical interchange of fish fauna, and to elucidate the phylogenetic position of Middle Eastern Paradiplozoon species within Diplozoidae. Four Paradiplozoon species were collected from 48 out of 94 investigated cyprinoid species. Three known species, Paradiplozoon homoion, Paradiplozoon bliccae and Paradiplozoon bingolensis, were recorded on new cyprinoid host species, and a new species, Paradiplozoon koubkovae n. sp., was recorded on Luciobarbus capito and Capoeta capoeta from the Caspian Sea basin in Iran and Turkey. Paradiplozoon bliccae, exhibiting a wide host range in the Middle East, expressed both morphological and genetic intraspecific variabilities. The four Paradiplozoon species collected in the Middle East were placed in divergent clades, showing the rich evolutionary history of diplozoid parasites in the Middle East. Our study also revealed that two lineages of African diplozoids have a Middle Eastern origin. We stress the importance of applying an integrative approach combining morphological, ecological and molecular methods to reveal the real diversity of diplozoids.
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Affiliation(s)
- Farshad Nejat
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Michal Benovics
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Eva Řehulková
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Jasna Vukić
- Department of Ecology, Faculty of Science, Charles University, Viničná 7, Prague 2 128 44, Czech Republic
| | - Radek Šanda
- Department of Ecology, Faculty of Science, Charles University, Viničná 7, Prague 2 128 44, Czech Republic
- Department of Zoology, National Museum, Václavské náměstí 68, Prague 1 110 00, Czech Republic
| | - Cüneyt Kaya
- Faculty of Fisheries, Recep Tayyip Erdogan University, 53100 Rize, Turkey
| | - Ali Serhan Tarkan
- Department of Basic Sciences, Faculty of Fisheries, Muğla Sıtkı Koçman University, 48000 Menteşe, Muğla, Turkey
| | - Asghar Abdoli
- Department of Biodiversity and Ecosystem Management, Environmental Science Research Institute, Shahid Beheshti University, Shahid Shahriari Sq. Velenjak, 1983969411 Tehran, Iran
| | - Sadi Aksu
- Vocational School of Health Services, Eskişehir Osmangazi University, Büyükdere Meşelik Yerleşkesi, 26040 Eskişehir, Turkey
| | - Andrea Šimková
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
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Guilder J, Copp GH, Thrush MA, Stinton N, Murphy D, Murray J, Tidbury HJ. Threats to UK freshwaters under climate change: Commonly traded aquatic ornamental species and their potential pathogens and parasites. NEOBIOTA 2022. [DOI: 10.3897/neobiota.76.80215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The aquatic ornamental industry, whilst providing socio-economic benefits, is a known introduction pathway for non-native species, which if invasive, can cause direct impacts to native species and ecosystems and also drive disease emergence by extending the geographic range of associated parasites and pathogens and by facilitating host-switching, spillover and spill-back. Although current UK temperatures are typically below those necessary for the survival and establishment of commonly-traded tropical, and some sub-tropical, non-native ornamental species, the higher water temperatures predicted under climate-change scenarios are likely to increase the probability of survival and establishment. Our study aimed primarily to identify which of the commonly-traded non-native ornamental aquatic species (fish and invertebrates), and their pathogens and parasites, are likely to benefit in terms of survival and establishment in UK waters under predicted future climate conditions. Out of 233 ornamental species identified as traded in the UK, 24 were screened, via literature search, for potential parasites and pathogens (PPPs) due to their increased risk of survival and establishment under climate change. We found a total of 155 PPPs, the majority of which were platyhelminths, viruses and bacteria. While many of the identified PPPs were already known to occur in UK waters, PPPs currently absent from UK waters and with zoonotic potential were also identified. Results are discussed in the context of understanding potential impact, in addition to provision of evidence to inform risk assessment and mitigation approaches.
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Nitta M. A new monogenean species, Gyrodactylus ajime n. sp. (Gyrodactylidae), parasitic on Niwaella delicata (Niwa), an endemic loach of Japan. Syst Parasitol 2021; 98:307-319. [PMID: 33871763 DOI: 10.1007/s11230-021-09979-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 04/08/2021] [Indexed: 11/25/2022]
Abstract
A new gyrodactylid species, Gyrodactylus ajime n. sp., is described from the skin and fins of an endemic and commercially important loach Niwaella delicata (Niwa) (Cypriniformes: Cobitoidea: Cobitidae), from the upper reach of the River Yura in Ashiu, Kyoto Prefecture, Japan with scanning electron microscopy observations and molecular data. This species can be distinguished from congenerics by characteristics of the sickle of the marginal hook: the sickle proper is composed of two straight sections and a curved section; its short point extends beyond the limit of the toe and is directed downwards; and the upper corner of heel angular is slightly raised. There are 31 species and subspecies of native loaches (Cobitoidea) known from Japan, of which 25 are red-listed nationally, and two are commercially important. I reviewed all reports of monogeneans from Japanese loaches, and found that only five fish species have been recorded as hosts of these parasites. This suggests that the parasite fauna of these fishes is poorly described. It is urgent to thoroughly describe the monogenean parasites of loaches in Japan as some of the parasite species may be threatened with co-extinction because their hosts are threatened, and to understand any negative impacts on commercially important fish species.
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Affiliation(s)
- Masato Nitta
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada Ward, Kobe City, Hyogo Prefecture, 657-8501, Japan. .,Setouchi Parasite Biodiversity Laboratory, 3-2-20-103, Ushita-Honmachi, Higashi Ward, Hiroshima City, Hiroshima Prefecture, 732-0066, Japan.
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Nitta M. Lamellodiscus (Monogenea: Diplectanidae) species parasitic on Japanese Acanthopagrus Peters, with proposals of L. chin n. sp. infecting A. sivicolus Akazaki and L. egusai nom. nov. for L. japonicus Ogawa & Egusa, 1978, a junior homonym of L. japonicus Pillai & Pillai, 1974. Syst Parasitol 2021; 98:177-188. [PMID: 33682039 DOI: 10.1007/s11230-021-09970-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 02/20/2021] [Indexed: 11/30/2022]
Abstract
Lamellodiscus chin n. sp. (Monogenea: Diplectanidae) was described from Acanthopagrus sivicolus Akazaki (Perciformes: Sparidae) in Okinawa-jima Island, Ryukyu Islands based on morphological and molecular data. This new species resembles L. spari and L. elegans in morphologically but differs by its accessory piece curving and widening toward the tip. Three species of Lamellodiscus (L. japonicus Ogawa & Egusa, 1978, L. takitai Ogawa & Egusa, 1978, and L. spari Zhukov, 1970) were recorded from A. schlegelii (Bleeker), and L. japonicus was collected from A. latus (Houttuyn) in the Seto Inland Sea, Japan. I herein propose Lamellodiscus egusai nom. nov. for L. japonicus which is a junior primary homonym of L. japonicus Pillai & Pillai, 1974. Based on the type specimens and newly collected specimens from wild hosts, the type localities of L. japonicus (= L. egusai nom. nov.) and L. takitai are discussed. In addition, a list of nominal species of Japanese diplectanids is provided.
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Affiliation(s)
- Masato Nitta
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan.
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Pinacho-Pinacho CD, Calixto-Rojas M, García-Vásquez A, Guzmán-Valdivieso I, Barrios-Gutiérrez JJ, Rubio-Godoy M. Species delimitation of Gyrodactylus (Monogenea: Gyrodactylidae) infecting the southernmost cyprinids (Actinopterygii: Cyprinidae) in the New World. Parasitol Res 2021; 120:831-848. [PMID: 33409628 DOI: 10.1007/s00436-020-06987-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 11/24/2020] [Indexed: 10/22/2022]
Abstract
The genus Gyrodactylus von Nordmann, 1832 represents one of the most diverse and widespread taxa within Monogenea, with approximately 500 species described worldwide. Thirty-three species of Gyrodactylus have been recorded in Mexico, and in the last two decades, at least 26 new species have been described mainly from freshwater fish families such as poeciliids, goodeids, profundulids, characids, and cichlids. In this study, we describe two new species of Gyrodactylus infecting freshwater cyprinids based on morphological and molecular characteristics. Gyrodactylus ticuchi n. sp. and Gyrodactylus tobala n. sp. were recovered from Notropis moralesi de Buen and N. imeldae Cortés, respectively, captured in five localities from the State of Oaxaca, Mexico. The new species differ slightly from their congeners in the morphology of the haptoral hard parts and the male copulatory organ. Sequences of the Internal Transcribed Spacers rDNA (ITS1-5.8S-ITS2), cytochrome oxidase subunit I (cox1), and the D2 + D3 domains of the large subunit (28S rDNA) were obtained from multiple specimens and analyzed using Maximum Likelihood (ML) and Bayesian Inference (BI). Phylogenetic hypotheses using ITS rDNA, cox1, and 28S rDNA genes recovered two new species of Gyrodactylus from N. moralesi and N. imeldae; we briefly discuss their phylogenetic relationship with other congeners. These gyrodactylids represent the first species described in species of Notropis from southern Mexico, the cyprinids exhibiting the southernmost distribution in the New World.
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Affiliation(s)
- Carlos Daniel Pinacho-Pinacho
- Cátedras CONACyT, Instituto de Ecología, A. C, Red de Estudios Moleculares Avanzados, Carretera antigua a Coatepec 351, El Haya, Xalapa, 91070, Veracruz, Mexico.
| | - Miguel Calixto-Rojas
- Instituto de Ecología, A.C., Red de Biología Evolutiva, Km 2.5 Ant. Carretera a Coatepec, 91070 Xalapa, Veracruz, Mexico
| | - Adriana García-Vásquez
- Instituto de Ecología, A.C., Red de Biología Evolutiva, Km 2.5 Ant. Carretera a Coatepec, 91070 Xalapa, Veracruz, Mexico
| | - Ismael Guzmán-Valdivieso
- Instituto de Ecología, A.C., Red de Biología Evolutiva, Km 2.5 Ant. Carretera a Coatepec, 91070 Xalapa, Veracruz, Mexico
| | - Juan J Barrios-Gutiérrez
- Instituto de Ecología, A.C., Red de Biología Evolutiva, Km 2.5 Ant. Carretera a Coatepec, 91070 Xalapa, Veracruz, Mexico
| | - Miguel Rubio-Godoy
- Instituto de Ecología, A.C., Red de Biología Evolutiva, Km 2.5 Ant. Carretera a Coatepec, 91070 Xalapa, Veracruz, Mexico
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Gobioecetes longibasais n. sp. (Monogenea: Dactylogyridae) from Rhinogobius similis Gill (Perciformes: Gobiidae) from Okinawa-jima Island, the Ryukyu Archipelago, southern Japan, with a new host record for Gobioecetes biwaensis Ogawa & Itoh, 2017. Syst Parasitol 2020; 97:193-200. [PMID: 32065369 DOI: 10.1007/s11230-020-09905-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 01/11/2020] [Indexed: 10/25/2022]
Abstract
Gobioecetes longibasis n. sp. (Monogenea: Dactylogyridae) from the gills of the freshwater goby Rhinogobius similis Gill (Perciformes: Gobiidae) in the River Teima, Okinawa-jima Island, the Ryukyu Archipelago, southern Japan, is described. The new species is distinguished from two congeneric species of Gobioecetes Ogawa & Itoh, 2017, G. rhinogobius (Ling, 1973) and G. biwaensis Ogawa & Itoh, 2017, by having longer ventral hamuli, longer and wider internal process of the dorsal hamuli, and the ratio of dorsal hamulus length to base length. This new species is host-specific to R. similis and considered to be endemic to Okinawa-jima Island or the Ryukyu Archipelago. We also report Rhinogobius sp. OM from a tributary of Lake Biwa, Shiga Prefecture, central Japan, as a new host of G. biwaensis.
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Dos Santos QM, Maina JN, Avenant-Oldewage A. Gyrodactylus magadiensis n. sp. (Monogenea, Gyrodactylidae) parasitising the gills of Alcolapia grahami (Perciformes, Cichlidae), a fish inhabiting the extreme environment of Lake Magadi, Kenya. ACTA ACUST UNITED AC 2019; 26:76. [PMID: 31859621 PMCID: PMC6924288 DOI: 10.1051/parasite/2019077] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 12/06/2019] [Indexed: 11/14/2022]
Abstract
A new species of Gyrodactylus von Nordmann, 1832 is described from the gills of Alcolapia grahami, a tilapian fish endemic to Lake Magadi. This alkaline soda lake in the Rift Valley in Kenya is an extreme environment with pH as high as 11, temperatures up to 42 °C, and diurnal fluctuation between hyperoxia and virtual anoxia. Nevertheless, gyrodactylid monogeneans able to survive these hostile conditions were detected from the gills the Magadi tilapia. The worms were studied using light microscopy, isolated sclerites observed using scanning electron microscopy, and molecular techniques used to genetically characterize the specimens. The gyrodactylid was described as Gyrodactylus magadiensis n. sp. and could be distinguished from other Gyrodactylus species infecting African cichlid fish based on the comparatively long and narrow hamuli, a ventral bar with small rounded anterolateral processes and a tongue-shaped posterior membrane, and marginal hooks with slender sickles which are angled forward, a trapezoid to square toe, rounded heel, a long bridge prior to reaching marginal sickle shaft, and a long lateral edge of the toe. The species is also distinct from all other Gyrodactylus taxa based on the ITS region of rDNA (ITS1-5.8s-ITS2), strongly supporting the designation of a new species. These findings represent the second record of Gyrodactylus from Kenya, with the description of G. magadiensis bringing the total number of Gyrodactylus species described from African cichlids to 18.
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Affiliation(s)
- Quinton Marco Dos Santos
- Department of Zoology, University of Johannesburg, PO Box 524, Auckland Park, 2006 Johannesburg, South Africa
| | - John Ndegwa Maina
- Department of Zoology, University of Johannesburg, PO Box 524, Auckland Park, 2006 Johannesburg, South Africa
| | - Annemariè Avenant-Oldewage
- Department of Zoology, University of Johannesburg, PO Box 524, Auckland Park, 2006 Johannesburg, South Africa
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Nitta M. A new genus for Diplectanum setosum Nagibina, 1976 (Monogenea: Dipletanidae), a parasite of Psammoperca waigiensis (Cuvier) (Perciformes: Latidae) from Okinawa-jima Island, Japan. Syst Parasitol 2019; 96:10.1007/s11230-019-09888-2. [PMID: 31712942 DOI: 10.1007/s11230-019-09888-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/10/2019] [Indexed: 10/25/2022]
Abstract
The diplectanid monogenean Diplectanum setosum Nagibina, 1976 is redescribed based on newly collected specimens from Psammoperca waigiensis (Cuvier) (Perciformes: Latidae) from the Okinawa-jima Islands, Okinawa Prefecture, Japan, and transferred to a new genus, Latiphagum n. g., herein proposed based on the results of the morphological and molecular analysis. This new genus is closely related with Pseudorhabdosynochus Yamaguti, 1958, Echinoplectanum Justine & Euzet, 2006, and Laticola Yang, Kritsky, Sun, Zhang, Shi, & Agrawal, 2006, but distinguished from them by the male copulatory organ (MCO) of the new genus devoid of cirrus, the tube supported both sides by two plates with long bristles, and the presence of the prostatic reservoir in the expanded base of the MCO.
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Affiliation(s)
- Masato Nitta
- Graduate School of Science, Kobe University, 1-1 Rokkodai Nada, Kobe, Hyōgo, 657-8501, Japan.
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