Paraorygmatobothrium taylori n. sp. (Tetraphyllidea: Phyllobothriidae) from the Australian weasel shark Hemigaleus australiensis White, Last & Compagno (Carcharhiniformes: Hemigaleidae)
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Paraorygmatobothrium taylori n. sp. (Tetraphyllidea: Phyllobothriidae) is described from the Australian weasel shark Hemigaleus australiensis White, Last & Compagno in Moreton Bay, off Queensland, Australia. The new species differs from 10 of the 11 described species of Paraorygmatobothrium Ruhnke, 1994 by the possession of prominent, semicircular bothridial muscle bands. From P. barberi Ruhnke, 1994, with which it shares the bothridial muscle bands, it differs in the possession of a cephalic peduncle and vitelline follicles that extend almost to the mid-line of the proglottis and are reduced, rather than completely interrupted, at the level of the ovary. P. janineae Ruhnke, Healy & Shapero, 2006 is recorded from its type–host but in a new locality, Moreton Bay, off Queensland, Australia. P. taylori is the third species of the genus recorded from the Hemigaleidae in Australian waters. Three of the eight known hemigaleid species are now recorded to harbour this genus, and three different species are now known from the two hemigaleids found in Australian waters.
KeywordsVitelline Follicle Genital Atrium Australian Water Muscle Band Queensland Museum
We thank Dr Stephen Taylor and John Page for their assistance in the collection of elasmobranch specimens, Susan Theiss for assistance with SEM and Nicole Gunter and Dr Terrence Miller for providing helpful comments on the manuscript. We also thank Seaworld Research and Rescue Foundation and the Tangalooma Wild Dolphin Resort for support of a broader project to MBB and Dr S. Taylor, of which this was a part. Sampling was conducted under DPI&F General Fisheries Permits PRM03951I and 55543. All procedures were approved by the UQ Animal Ethics Committee.
- Agustí, C., Aznar, F. J., Olson, P. D., Littlewood, D. T. J., Kostadinova, A., & Raga, J. A. (2005). Morphological and molecular characterization of tetraphyllidean merocercoids (Platyhelminthes: Cestoda) of striped dolphins (Stenella coeruleoalba) from the Western Mediterranean. Parasitology, 130, 461–474.PubMedCrossRefGoogle Scholar
- Cake, E. W. (1976). A key to larval cestodes of shallow-water, benthic mollusks of the northern Gulf of Mexico. Proceedings of the Helminthological Society of Washington, 43, 160–171.Google Scholar
- Carvajal, J., Barros, C., & Santander, G. (1982). In vitro culture of Rhodobothrium mesodesmatum (Cestoda: Tetraphyllidea), parasite of a Chilean clam. Proceedings of the Helminthological Society of Washington, 49, 226–230.Google Scholar
- Compagno, L., Dando, M., & Fowler, S. (2005). A field guide to the sharks of the world. London: Collins, 368 pp.Google Scholar
- Faliex, E., Tyler, G., & Euzet, L. (2000). A new species of Ditrachybothridium (Cestoda: Diphyllidea) from Galeus sp. (Selachii, Scyliorhynidae) from the South Pacific Ocean, with a revision of the diagnosis of the order, family, and genus and notes on descriptive terminology of microtriches. Journal of Parasitology, 86, 1078–1084.PubMedCrossRefGoogle Scholar
- Last, P. R., & Stevens, J. D. (2009). Sharks and rays of Australia (2nd ed., p. 644). Australia: CSIRO Publishing.Google Scholar
- Ruhnke, T. R., & Carpenter, S. D. (2008). Two new species of Paraorygmatobothrium Ruhnke, 1994 (Tetraphyllidea: Phyllobothriidae) from the smooth-hound Mustelus mustelus (L.) and the gummy shark M. antarcticus Günther (Carcharhiniformes: Triakidae). Systematic Parasitology, 71, 213–222.PubMedCrossRefGoogle Scholar
- White, W. T., Last, P. R., & Compagno, L. J. V. (2005). Description of a new species of weasel shark, Hemigaleus australiensis n. sp. (Carcharhiniformes: Hemigaleidae) from Australian waters. Zootaxa, 1077, 37–49.Google Scholar