Descriptions of two new acanthocephalans (Rhadinorhynchidae) from marine fish off the Pacific coast of Vietnam
- 43 Downloads
Two rhadinorhynchid acanthocephalans are described from marine fishes off the Pacific coast of Vietnam. Sclerocollum neorubrimaris n. sp. (Gorgorhynchinae Van Cleave & Lincicome, 1940) is described from the spine-foot rabbitfish Siganus guttatus (Bloch) (Siganidae) off Nha Trang. The new species is similar to the type-species, Sclerocollum rubrimaris Schmidt & Paperna, 1978 in most measurements and counts but has a posterior cephalic ganglion, a sub-ventral female gonopore, and one dorsal paravaginal filament bundle. In S. rubrimaris, the cephalic ganglion is near the middle of the receptacle, the female gonopore is terminal with two paravaginal filament bundles. The new species is distinguished from three other species of Sclerocollum Schmidt & Paperna, 1978 in proboscis hook formulas and the position of the female gonopore and cephalic ganglion. The issue of the importance of the position of the cephalic ganglion at the generic and sub-generic levels in the Acanthocephala is discussed. Females of Australorhynchus multispinosus n. sp. (Gorgorhynchinae) are described from the red cornetfish Fistularia petimba Lacépède off Nha Trang in the Pacific south. It is distinguished from the only other species of the genus, Australorhynchus tetramorphacanthus Lebedev, 1967, by having more trunk spines extending beyond the level of the proboscis receptacle and a smaller proboscis with considerably fewer hooks.
We thank Naomi Mortensen, Bean Museum (BYU) for expert help in the preparation and organization of plates. We are especially grateful to Dr Anna Phillips (USNPC, Washington, D.C., USA), Dr Gabor Racz (HWML, Lincoln, Nebraska, USA), Dr Leslie Chisholm (SAM, Adelaide, Australia), Eileen Harris and Jasmin Perera (NHM, London, UK), Dr Stephen Keable and Dr Camron Slatyer (AM, Sydney, Australia) for making it possible for us to study the type- and voucher material loaned from their respective institutions.
This project was supported by the Department of Biology, Brigham Young University (BYU), Provo, Utah, the Vietnam National Program No. 47 under Grant code VAST.DA47.12/16-19, and by an Institutional Grant from the Parasitology Center, Inc. (PCI), Scottsdale, Arizona.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable institutional, national and international guidelines for the care and use of animals were followed.
- Allen, G. R., & Swianston, R. (1998). The marine fishes of north-western Australia: a field guide for anglers and divers. Perth: Western Australia Museum, 201 pp.Google Scholar
- Amin, O. M., Heckmann, R. A., Ha, N. V., Luc, P. V., & Doanh, P. N. (2000). Revision of the genus Pallisentis (Acanthocephala: Quadrigyridae) with the erection of three new subgenera, the description of Pallisentis (Brevitritospinus) vietnamensis subgen. et sp. n., a key to species of Pallisentis, and the description of a new quadrigyrid genus. Pararaosentis gen. n. Comparative Parasitology, 67, 40–50.Google Scholar
- Amin, O. M., Heckmann, R. A., & Ha, N. V. (2004). On the immature stages of Pallisentis (Pallisentis) celatus (Acanthocephala: Quadrugyridae) from occasional fish hosts in Vietnam. Raffles Bulletin of Zoology, 52, 593–598.Google Scholar
- Amin, O. M., Ha, N. V., & Heckmann, R. A. (2008a). New and already known acanthocephalans from amphibians and reptiles in Vietnam, with keys to species of Pseudoacanthocephalus Petrochenko, 1956 (Echinorhynchidae) and Sphaerechinorhynchus Johnston and Deland, 1929 (Plagiorhynchidae). Journal of Parasitology, 94, 181–189.CrossRefGoogle Scholar
- Amin, O. M., Heckmann, R. A., & Ha, N. V. (2011a). Description of two new species of Rhadinorhynchus (Acanthocephala: Rhadinorhynchidae) from marine fish in Halong Bay, Vietnam, with a key to species. Acta Parasitologica, 56, 67–77.Google Scholar
- Amin, O. M., Ha, N. V., & Ngo, H. D. (2011b). First report of Neoechinorhynchus (Acanthocephala: Neoechinorhynchidae) from marine fish (Belonidae, Clupeidae, Megalopidae, Mugilidae, Sciaenidae) in Vietnamese waters, with the description of six new species with unique anatomical structures. Parasite, 18, 21–34.CrossRefGoogle Scholar
- Amin, O. M., Heckmann, R. A., & Ha, N. V. (2011c). Description of Heterosentis holospinus n. sp. (Acanthocephala: Arhythmacanthidae) from the striped eel catfish Plotosus lineatus in Halong Bay, Vietnam, with a key to species of Heterosentis and reconsideration of the subfamilies of Arhythmacanthidae. Comparative Parasitology, 78, 29–38.CrossRefGoogle Scholar
- Amin, O. M., Heckmann, R. A., Halajian, A., & El-Naggar, A. M. (2011d). The morphology of an unique population of Corynosoma strumosum (Acanthocephala, Polymorphidae) from the Caspian seal, Pusa caspica, in the land-locked Caspian Sea using SEM, with special notes on histopathology. Acta Parasitologica, 56, 438–445.Google Scholar
- Arthur, J. R., & Te, B. Q. (2006). Check list of parasites of fishes of Vietnam. FAO Fisher Tech Paper, 369/2, 123 pp.Google Scholar
- Edmonds, S. J. (1964). Australian Acanthocephala. No. 11. Transactions of the Royal Society of South Australia, 88, 41–45.Google Scholar
- Fritzsche, R. A. (1976). A review of the cornetfishes, genus Fistularia (Fistularidae), with a discussion of intrageneric relationship and zoogeography. Bulletin of Marine Science, 26, 196–204.Google Scholar
- Golvan, Y. J. (1969). Systématique des Acanthocéphales (Acanthocephala Rudolphi, 1801). Premiére Partie. L’Ordre des Palaeacanthocephala Meyer, 1931. Premier fascicule. La Superfamille des Echinorhynchoidae (Cobbold, 1876) Golvan et Houin, 1963. Mémoires du Museum National d’Histoire Naturelle, 57, 1–373.Google Scholar
- Hassanine, R. M. El-S. (2006). Acanthocephalans from Red Sea fishes, Family Cavisomidae Meyer, 1932: the seasonal cycle of Diplosentis nudus (Harada, 1938) Pichelin et Cribb, 2001 in a definitive fish host, and a comment on Sclerocollum Schmidt and Paperna, 1978. Acta Parasitologica, 51, 123–129.Google Scholar
- Woodland, D. J. (1990). Revision of the fish family Siganidae with descriptions of two new species and comments on distribution and biology. Honolulu, Hawaii: Bernice Pauahi Bishop Museum, 136 pp.Google Scholar