Nesippus orientalis Heller, 1868 (Pandaridae: Siphonostomatoida): descriptions of the adult, young and immature females, a first description of the male and aspects of their functional morphology
- 76 Downloads
Nesippus orientalis Heller, 1868, a cosmopolitan species found in the mouth and on the gill-arches of a number of shark hosts, is distinguished from other species by the presence of dorsal plates on the fourth thoracic segment. Specimens were collected from various sharks caught in the nets of the Natal Sharks Board, off the coast of KwaZulu-Natal, South Africa. Collected specimens were preserved in 70% ethanol and studied using the wooden slide technique and scanning electron microscopy. Careful examination of adult females revealed features previously not described in detail. Furthermore, some female specimens were still grasping the placoid scales of their hosts. These specimens showed how the maxillipeds are used to clasp the host. Immature, young females and males, some still attached to the young females, were also collected. The males use their maxillipeds, which have a slightly different structure to those of the female, to hold onto the females.
KeywordsCorrugate Surface Plumose Seta Dorsal Plate Parasitic Copepod Frontal Plate
Unable to display preview. Download preview PDF.
The authors thank the Natal Sharks Board and Department of Biodiversity at the University of Limpopo (UL) for field and laboratory support, Ms A. Möller (UL) for assistance with SEM observations, Mr R Sandrock (UL) and Mr C Visser (UL) for help with photos and illustrations, Prof. PAS Olivier (UL) for advice regarding the manuscript and the Research and Development Administration (UL) for financial support.
- Barnard K.H. (1955). South African parasitic Copepoda. Annals of the South African Museum 41:223–312Google Scholar
- Benz G.W. (1986). Distribution of siphonostomatoid copepods parasitic upon large pelagic sharks in the western North Atlantic. Syllogeus 58:211–219Google Scholar
- Benz G.W. (1992). How Pandarus species (Copepoda: Pandaridae) attach to their shark hosts. Journal of Parasitology 78:368–370Google Scholar
- Cressey R.F. (1967a) Revision of the family Pandaridae (Copepoda, Caligoida). Proceedings of the United States National Museum, 121:1–133Google Scholar
- Cressey R.F. (1967b) Caligoid copepods parasitic on sharks of the Indian Ocean. Proceedings of the United States National Museum, 121:1–21Google Scholar
- Cressey R.F. (1970) Copepods parasitic on sharks from the west coast of Florida. Smithsonian Contributions to Zoology 38:1–30Google Scholar
- Cressey R., Boyle H. (1978). A new genus and species of parasitic copepod (Pandaridae) from a unique new shark. Pacific Science 32:25–30Google Scholar
- Heller C. (1868) Crustaceen. Reise der Österreichischen Fregatte Novara um die Erde in den Jahren 1857, 1858, 1859. Zoologie 2(3):1–280, pls 1–25Google Scholar
- Huys R., Boxshall G.A. (1991). Copepod evolution. London: The Ray Society, London, 468 ppGoogle Scholar
- Kabata Z. (1974). Mouth and mode of feeding of Caligidae (Copepoda), parasites of fishes, as determined by light and scanning electron microscopy. Journal of the Fisheries Research Board of Canada 31:1583–1588Google Scholar
- Kabata Z. (1979). Parasitic copepods of British fishes. London, The Ray Society, 468 ppGoogle Scholar
- Oldewage W.H. (1993). Three species of piscine parasitic copepods from southern African coastal waters. South African Journal of Zoology 28:113–121Google Scholar
- Pillai N.K. (1985). The fauna of India: copepod parasites of marine fishes. Calcutta, Zoological Survey of India, 900 ppGoogle Scholar
- Wilson C.B. (1905). New species of parasitic copepods from the Massachusetts coast. Proceedings of the Biological Society of Washington 18:127–132Google Scholar
- Wilson C.B. (1907). North American parasitic copepods belonging to the family Caligidae. Parts 3 and 4. A revision of the Pandarinae and the Cecropinae. Proceedings of the United States National Museum 33:323–490Google Scholar