Coitocaecum is a genus of trematodes in the family Opecoelidae. It has been synonymised to Ozakia Wisniewski, 1934,Wisniewski, L. W. (1934). Beitrag zur systematik der Coitocaecidae (Trematoda). Nicolla g. n., Ozakia g. n., Coitocaecum proavitum sp. n. Mémoires de l'Académie Polonaise des Sciences et des Lettres, Série B, 27–41. Paradactylostomum Zhukov, 1972 nec Toman, 1992,Zhukov, E. V. (1972). New genera of trematodes from marine fishes of India. Parazitologiya, 6(4), 346–350.Toman, G. (1992). Digenetic trematodes of marine teleost fishes from the Seychelles, Indian Ocean. III. Acta Parasitologica, 37(3), 119–126. and Pseudocoitocaecum Bilqees, 1972.Bilqees, F. M. (1972). Marine fish trematodes of West Pakistan, VIII. Description of thirteen new species including a new genus Pseudocoitocaecum from fishes of Karachi coast. In Bilqees, F., Saeed, R., Rehana, R., Khatoon, A. & Kaikabad, S. (Eds.), Helminth parasites of Some Vertebrates Chiefly from Fishes of West Pakistan (1–40). Karachi: Agricultural Research Council, Government of Pakistan.
Species Coitocaecum anaspidis Hickman, 1934Hickman, V. V. (1934). On Coitocaecum anaspidis sp. nov., a trematode exhibiting progenesis in the fresh-water crustacean Anaspides tasmaniae Thomson. Parasitology, 26(1), 121–128. Coitocaecum austrosinicum Ding, 1993Ding, X. (1993). Marine fish trematodes, 2. On a new species of Coitocaecum. Annual Bulletin of the Society of Parasitology, Guangdong Province, 14–15, 200. Coitocaecum banneri Martin, 1960Martin, W. E. (1960). Hawaiian helminths, Part III. New opecoelid trematodes. Pacific Science, 14(4), 411–415. Coitocaecum bengalense (Madhavi, Narasimhulu & Shameem, 1986)Madhavi, R., Narasimhulu, S. & Shameem, U. (1986). Digenetic trematodes from marine fishes of Kalingapatnam coast, Bay of Bengal. Families Lepocreadiidae, Deropristiidae and Schistorchiidae. Rivista di Parassitologia, 47, 111–119. Coitocaecum bombayense (Ahmad, 1984) Bray, 1987Ahmad, J. (1984). On three new opecoelid trematodes from marine fishes of Arabian Sea, off the Bombay coast, India. Rivista di Parassitologia, 44, 301–308.Bray, R. A. (1987). Some helminth parasites of marine fishes of south Africa: family Opecoelidae (Digenea). Journal of Natural History, 21(4), 1049–1075. Coitocaecum cadenati Dollfus, 1960Dollfus, R. P. (1960). Sur trois helminthes (Distomien, tetrarhynque, Palaeacanthocephale) d'un Melanoglaea ventralis K. Barnard 1941, poisson teleosteen. Bulletin de l'Institut Fondamental de l'Afrique Noire, 22(A), 385–394. Coitocaecum callyodontis Yamaguti, 1942Yamaguti, S. (1942). Studies on the helminth fauna of Japan. Part 39. Trematodes of fishes mainly from Naha. Transactions of the Biogeographical Society of Japan, 3, 329–398 Coitocaecum capense Bray, 1987 Coitocaecum chaetodoni Ahmad, 1984 Coitocaecum diplobulbosum Ozaki, 1929Ozaki, Y. (1929). Note on Coitocaecidae, a new trematode family. Annotationes Zoologicae Japonenses, 12(1), 75–90. Coitocaecum gerris (Shen, 1990) Liu, Peng, Gao, Fu, Wu, Lu, Gao & Xiao, 2010Shen, J. W. (1990). Digenetic trematodes of marine fishes from Hainan Island. Beijing: Science Press.Liu, S., Peng, W., Gao, P., Fu, M., Wu, H., Lu, M., Gao, J. & Xiao, J. (2010). Digenean parasites of Chinese marine fishes: a list of species, hosts and geographical distribution. Systematic Parasitology, 75(1), 1–52. Coitocaecum gymnophallum Nicoll, 1915 Coitocaecum indicum Ahmad, 1980Ahmad, J. (1980). On four new trematodes of the genus Coitocaecum Nicoll, 1915 (Trematoda, Opecoelidae) from marine fishes of Bay of Bengal. Acta Parasitologica Polonica, 27, 423–429. Coitocaecum kuhliae Machida, 2014Machida, M. (2014). Seven species of ppecoelid digeneans (Trematoda) from fishes of southern Japan, Palau, and the Philippines. Bulletin of the National Museum of Natural Sciences, Series A, 40(1), 1–3. Coitocaecum lateolabracis (Shen & Qiu, 1995) Liu, Peng, Gao, Fu, Wu, Lu, Gao & Xiao, 2010Shen, J. W. & Qiu, Z. Z. (1995). Studies on the trematodes of fishes from the Yellow Sea and the Bo Hai Sea. Beijing: Science Press. Coitocaecum latum Ozaki, 1929 Coitocaecum leptoscari Yamaguti, 1940Yamaguti, S. (1940). Studies on the helminth fauna of Japan. Part 31. Trematodes of fishes, VII. Japanese Journal of Zoology, 9, 35–108. Coitocaecum manteri Ahmad, 1980 Coitocaecum manteri Parukhin, 1971Parukhin, A. M. (1971). A study of the trematode fauna of fish from the Red Sea and the Gulf of Aden. Biologiya Morya, Kiev, 25, 136–146. Coitocaecum michaeli Aken'Ova & Cribb, 1996Aken'Ova, T. O. & Cribb, T. H. (1996). Two species of Coitocaecum Nicoll, 1915 (Digenea: Opecoelidae) from Moreton Bay, Queensland, Australia. Systematic Parasitology, 33(3), 217–224. Coitocaecum minutum (Pritchard, 1966) Yamaguti, 1971Pritchard, M. H. (1966). Studies on digenetic trematodes of Hawaiian fishes: family Opecoelidae Ozaki. Zoologische Jahrbucher, Abteilung für Systematik, 93, 173–202.Yamaguti, S. (1971). Synopsis of Digenetic Trematodes of Vertebrates. Tokyo: Keigaku. Coitocaecum muraenesocis Wang, Wang & Zhang, 1992Wang, Y., Wang, P. & Zhang, W. (1992). Opecoelid trematodes of marine fishes from Fujian Province. Wuyi Science Journal, 9, 67–89. Coitocaecum norae Martin, 1960 Coitocaecum orientalis Dwivedi, 1978Dwivedi, M. P. (1978). Coitocaecum orientalis n. sp. (Coitocaecidae: Trematoda) from a freshwater fish Nandus nandus. Rivista di Parassitologia, 39, 91–95. Coitocaecum orthorchis Ozaki, 1926Ozaki, Y. (1926). On some new species of trematodes of fresh water fish from Japan (Preliminary report). Dobutsugaku Zasshi, 38(450), 124–130. Coitocaecum palaoense Ogata, 1942Ogata, T. (1942). Sur une nouvelle espéce de trématode du genre Coitocaecum (note preliminaire). Dobutsugaku Zasshi, 54, 85–88. Coitocaecum parvum Crowcroft, 1945Crowcroft, P. W. (1945). New trematodes from Tasmanian fishes (Order Digenea. Family Allocreadiidae). Papers and Proceedings of the Royal Society of Tasmania, 61–70. Coitocaecum pfluegeri (Yamaguti, 1970)Yamaguti, S. (1970). Digenetic trematodes of Hawaiian fishes. Tokyo: Keigaku. Coitocaecum plagiorchis Ozaki, 1926 Coitocaecum proavitum Wisniewski, 1933Wisniewski, L. W. (1933). O rodzajach rodziny Coitocaecidae (Trematoda). Archiwum Towarzystwa Naukowego we Lwowie, (3)6(2), 1–13. Coitocaecum scombri Ahmad, 1980 Coitocaecum sigani Shen, 1990 Coitocaecum sillaginis (Shen, 1986) Liu, Peng, Gao, Fu, Wu, Lu, Gao & Xiao, 2010Shen, J. (1986). Opecoelidae trematodes of marine fishes from Hainan Island. Oceanologia et Limnologia Sinica, 17(5), 379–385. Coitocaecum testiobliquum Wisniewski, 1933Wisniewski, L. W. (1933). Über zwei neue progenetische Trematoden aus den balkanischen Gammariden. Bulletin International de l'Académie Polonaise des Sciences et des Lettres, Series B, Natural Science, 2(1933), 259–276. Coitocaecum thapari Ahmad, 1980 Coitocaecum thrissoclesis (Bilqees, 1972) Bray, 1987 Coitocaecum tropicum Manter, 1940Manter, H. W. (1940). Digenetic trematodes of fishes from the Galapagos Islands and the neighboring Pacific. Allan Hancock Pacific Expeditions, 2, 364–473. Coitocaecum tylogonium Manter, 1954Manter, H. W. (1954). Some digenetic trematodes from fishes of New Zealand. Transactions of the Royal Society of New Zealand, 82, 475–568. Coitocaecum unibulbosum Ozaki, 1929 Coitocaecum xesuri Yamaguti, 1940 Coitocaecum zealandicum Hine, 1977Hine, P. M. (1977). Two new digenean trematodes from New Zealand freshwater fishes. Journal of the Royal Society of New Zealand, 7(2), 163–170.
Species later synonymised with species of Coitocaecum Coitocaecum bengalense (Madhavi, Narasimhulu & Shameem, 1986) Paradactylostomum bengalense Madhavi, Narasimhulu & Shameem, 1986 Coitocaecum bombayense (Ahmad, 1984) Bray, 1987 Pseudocoitocaecum bombayensis Ahmad, 1984 Coitocaecum callyodontis Yamaguti, 1942 Ozakia callyodontis (Yamaguti, 1942) Yamaguti, 1971 Coitocaecum diplobulbosum Ozaki, 1929 Ozakia diplobulbosa (Ozaki, 1929) Wisniewski, 1933 Coitocaecum gerris (Shen, 1990) Liu, Peng, Gao, Fu, Wu, Lu, Gao & Xiao, 2010 Ozakia gerris Shen, 1990 Coitocaecum gymnophallum Nicoll, 1915 Coitocaecum glandulosum Yamaguti, 1934Yamaguti, S. (1934). Studies on the helminth fauna of Japan. Part 2. Trematodes of fishes. I. Japanese Journal of Zoology, 5, 249–541. Coitocaecum robustum Wang, 1984Wang, P. (1984). Some digenetic trematodes from fishes in Fujian province, China. Acta Zootaxonomica Sinica, 5, 249–541. Coitocaecum lateolabracis (Shen & Qiu, 1995) Liu, Peng, Gao, Fu, Wu, Lu, Gao & Xiao, 2010 Ozakia latelabracis Shen & Qiu, 1995 Ozakia lateolabracis Shen & Qiu, 1995 Coitocaecum latum Ozaki, 1929 Ozakia lata (Ozaki, 1929) Wisniewski, 1933 Coitocaecum minutum (Pritchard, 1966) Yamaguti, 1971 Nicolla minuta Pritchard, 1966 Coitocaecum orthorchis Ozaki, 1926 Ozakia orthorchis (Ozaki, 1926) Wisniewski, 1933 Coitocaecum pfluegeri (Yamaguti, 1970) Ozakia pfluegeri Yamaguti, 1970 Coitocaecum proavitum Wisniewski, 1933 Excoitocaecum proavitum (Wisniewski, 1933) Slusarski, 1958Slusarski, W. (1958). The adult Digenea from Salmonidae of the basin of the Vistula and of the South Baltic. Acta Parasitologica Polonica, 6, 247–528. Coitocaecum sillaginis (Shen, 1986) Liu, Peng, Gao, Fu, Wu, Lu, Gao & Xiao, 2010 Ozakia sillaginis Shen, 1986 Coitocaecum testiobliquum Wisniewski, 1933 Excoitocaecum testiobliquum (Wisniewski, 1933) Slusarski, 1958 Coitocaecum thrissoclesis (Bilqees, 1972) Bray, 1987 Paradactylostomum indicum Zhukov, 1972 Pseudocoitocaecum thrissoclesis Bilqees, 1972 Coitocaecum unibulbosum Ozaki, 1929 Ozakia unibulbosa (Ozaki, 1929) Wisniewski, 1933
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