Hamacreadium is a genus of trematodes in the family Opecoelidae. It is synonymous with Olivacreadium Bilqees, 1976.Bilqees, F. M. (1976). Olivacreadium n. gen. (Trematoda: Opecoelidae) based on two new species from the fishes of the Karachi coast. Norwegian Journal of Zoology, 24, 33–36. Species of Hamacreadium are endoparasitic in fish such as Lethrinus Cuvier, 1829.Cuvier, G. (1829). Le règne animal distribué d'après son organisation, pour servir de base à l'histoire naturelle des animaux et d'introduction à l'anatomie comparée. Paris: Chez Déterville.
Species Hamacreadium cribbi Bray & Justine, 2016 Hamacreadium hainanense Shen, 1990Shen, J. W. (1990). Digenetic trematodes of marine fishes from Hainan Island. Beijing: Science Press. Hamacreadium interruptum Nagaty, 1941Nagaty, H. F. (1941). Trematodes of fishes from the Red Sea. Part 2. The genus Hamacreadium Linton, 1910 (Fam. Allocreadiidae) with a description of two new species. Journal of Research of the Egyptian Medical Association, 24(7), 300–310. Hamacreadium lethrini Yamaguti, 1934Yamaguti, S. (1934). Studies on the helminth fauna of Japan. Part 2. Trematodes of fishes. I. Japanese Journal of Zoology, 5, 249–541. Hamacreadium longivesiculum (Yamaguti, 1952) Martin, Cutmore, Ward & Cribb, 2017Yamaguti, S. (1952). Parasitic worms mainly from Celebes. Part 1. New digenetic trematodes of fishes. Acta Medicinae Okayama, 8(2), 146–198.Martin, S., Cutmore, S., Ward, S. & Cribb, T. (2017). An updated concept and revised composition for Hamacreadium Linton, 1910 (Opecoelidae: Plagioporinae) clarifies a previously obscured pattern of host-specificity among species. Zootaxa, 4254(2), 151–187. Hamacreadium lutiani (Shen, 1990) Martin, Cutmore, Ward & Cribb, 2017 Hamacreadium morgani Baz, 1946Baz, I. I. (1946). A fish trematode of the genus Hamacreadium Linton, 1910 (F. Allocreadiidae). Journal of the Egyptian Medical Association, 29, 55–61. Hamacreadium mutabile Linton, 1910 Hamacreadium phyllorchis (Bilqees, 1976) Cribb, 2005Cribb, T. H. (2005). Family Opecoelidae Ozaki, 1925. In Bray, R., Gibson, D. & Jones, A. (Eds.), Keys to the Trematoda, Volume 2 (pp. 443–531). London: CABI Publishing and The Natural History Museum.
Species synonymised with species of Hamacreadium Hamacreadium hainanense Shen, 1990 Maculifer spiralis Soota, Srivastava & Ghosh, 1970Soota, T. D., Srivastava, C. B. & Ghosh, R. K. (1970). Studies on the helminth fauna of the Great Nicobar Island. Part I. Trematoda. Proceedings of the 56th Indian Science Congress, 3, 503–504. Hamacreadium interruptum Nagaty, 1941 Hamacreadium interruptus Nagaty, 1941 Hamacreadium longivesiculum (Yamaguti, 1952) Plagioporus longivesicula Yamaguti, 1952 Hamacreadium lutiani (Shen, 1990) Martin, Cutmore, Ward & Cribb, 2017 Podocotyle lutiani Shen, 1990 Hamacreadium morgani Baz, 1946 Hamacreadium agyptia Abdou, Heckmann, Beltagy & Ashour, 2001Abdou, N. L., Heckmann, R. A., Beltagy, S. M. & Ashour, A. A. (2001). Pseudoplagioporus interruptus Durio and Manter, 1968 and Hamacreadium agyptia sp. n. (Trematoda: Opecoeliidae) from the Red Sea Fish in Egypt. Journal of King Abdulaziz University, Marine Science, 12, 175–188. Hamacreadium balistesi Nagaty & Abdel-Aal, 1962Nagaty, H. F. & Abdel-Aal, T. M. (1962). Trematodes of fishes from the Red Sea, part 19. On three new species of Podocotyle (Family Allocreadiidae). Journal of Parasitology, 48(5), 746–747. Hamacreadium egyptia Abdou, Heckmann, Beltagy & Ashour, 2001 Hamacreadium lenthrium Manter, 1963Manter, H. W. (1963). Studies on digenetic trematodes of fishes of Fiji. III. Families Acanthocolpidae, Fellodistomatidae, and Cryptogonimidae. Journal of Parasitology, 49(3), 443–450. Hamacreadium lethrini Nagaty & Abdel-Aal, 1962 Hamacreadium nagatyi Lamothe-Argumedo, 1962Lamothe-Argumedo, R. (1962). Redescripcion de dos trematodos digeneos de peces del Pacifico Mexicano. Anales del Instituto de Biología, Universidad de México, 33, 97–111. Hamacreadium nebulosae Nagaty & Abdel-Aal, 1962 Hamacreadium mutabile Linton, 1910 Hamacreadium indicum Gupta & Tewari, 1985Gupta, V. & Tewari, M. (1985). Trematode parasites of marine fishes. I. On a new species Hamacreadium indicum n. sp. (Allocreadiidae Stossich, 1903) from a marine fish Chirocentrus dorab (Ruppell) from Madras. Indian Journal of Helminthology, 36(1), 40–44. Hamacreadium phyllorchis (Bilqees, 1976) Hamacreadium heterorchis (Bilqees, 1976) Cribb, 2005 Olivacreadium heterorchis Biqees, 1976 Olivacreadium phyllorchis Bilqees, 1976
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