Three new species of Merizocotyle Cerfontaine, 1894 (Monogenea: Monocotylidae) from the nasal tissues of dasyatid rays collected off Malaysian and Indonesian Borneo
- 142 Downloads
Three new species of Merizocotyle Cerfontaine, 1894 (Monogenea: Monocotylidae) are described from the nasal tissues of stingrays collected off Borneo. Merizocotyle macrostrobus n. sp. is described from the dwarf whipray Himantura walga (Müller & Henle) collected in shallow waters off Sematan, Sarawak, Malaysia. This species can be distinguished from the other members of the genus by the morphology of the sclerotised male copulatory organ, which is long with many twists and loops. The vaginae of this species are also long and looped. Merizocotyle papillae n. sp. is described from the roughnose stingray Pastinachus solocirostris Last, Manjaji & Yearsley collected off Sematan and Mukah, Sarawak, Malaysia. It is distinguished from the other species of Merizocotyle by the morphology of the male copulatory organ, which is a sclerotised tube that expands slightly and then tapers at the distal end, and by the presence of papillae on the dorsal edge of the haptor. Merizocotyle rhadinopeos n. sp. is described from the whitenose whip ray Himantura uarnacoides (Bleeker) collected off Manggar, East Kalimantan, Indonesia. It can be differentiated by the male copulatory organ, which is a short, narrow, curved, sclerotised tube tapering distally, and the path of the ovary, which runs anteriorly to the base of the oötype. We also provide details of new host and/or locality records for M. australensis (Beverley-Burton & Williams, 1989) Chisholm, Wheeler & Beverley-Burton, 1995, M. icopae Beverley-Burton & Williams, 1989 and M. pseudodasybatis (Hargis, 1955) Chisholm, Wheeler & Beverley-Burton, 1995.
KeywordsSeminal Receptacle Male Copulatory Organ Intestinal Caecum Nasal Tissue Male Accessory Gland
We thank Janine Caira (University of Connecticut, USA) and Kirsten Jensen (University of Kansas, USA), for their continued and outstanding efforts in collecting and providing us with a vast diversity of elasmobranch material. We are also grateful to Eileen Harris (NHM) and Pat Pilitt (USNPC) for the loan of specimens. This study was supported by funds from the National Science Foundation’s Biotic Surveys and Inventories Program (award nos DEB-103640, 0542846, 0542941).
- Chisholm, L. A., & Whittington, I. D. (1995). A revision of Dendromonocotyle Hargis, 1955 (Monogenea: Monocotylidae) with a description of a new species from Pastinachus sephen (Forsskål) (Myliobatiformes: Dasyatididae) from the Great Barrier Reef, Australia. Journal of Natural History, 29, 1093–1119.CrossRefGoogle Scholar
- Chisholm, L. A., & Whittington, I. D. (1999a). A revision of the Merizocotylinae Johnston and Tiegs, 1922 (Monogenea: Monocotylidae) with descriptions of new species of Empruthotrema Johnston and Tiegs, 1922 and Merizocotyle Cerfontaine, 1894. Journal of Natural History, 33, 1–28.CrossRefGoogle Scholar
- Chisholm, L. A., & Whittington, I. D. (1999b). Empruthotrema quindecima sp. n. (Monogenea: Monocotylidae) from the nasal fossae of Taeniura lymma (Dasyatididae) from Heron Island and Lizard Island, Great Barrier Reef, Australia. Folia Parasitologica, 46, 274–278.Google Scholar
- Neifar, L., Euzet, L., & Ben Hassine, O. K. (2000). New species of the Monocotylidae (Monogenea) from the stingray Dasyatis tortonesi Capapé (Euselachii, Dasyatidae) off the Tunisian coast, with comments on host-specificity and the specific identities of Mediterranean stingrays. Systematic Parasitology, 47, 43–50.PubMedCrossRefGoogle Scholar
- Whittington, I. D., & Chisholm, L. A. (2003). Diversity of Monogenea from Chondrichthyes: do monogeneans fear sharks? In: Combes, C., & Jourdane, J. (Eds) Taxonomy, ecology and evolution of metazoan parasites. (Livre hommage à Louis Euzet). Tome 2. Perpignan: Presses Universitaires de Perpignan, pp. 339–363.Google Scholar