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Morphological Variation in Hatschekia Conifera Yamaguti, 1939 (Copepoda, Siphonostomatoida) From the Southern Atlantic Ocean

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Specimens of Hatschekia conifera Yamaguti, 1939 (syn. H. acuta Barnard, 1948) sampled from a single population of Brama brama (Bonnaterre, 1788) off Hondeklip Bay on the west coast of South Africa, exhibited constant morphological differences from that reported previously for this species. The main discrepancies regard the segmentation and setation of the antennule, the first, second and fourth swimming legs, as well as that of the post-antennal process and furcal rami. As the general shape of the cephalothorax and large, elongated genital segment appear to be regular in the species, these are suggested as distinguishing characters, rather than segmentation and setation, which are traditionally constant features in parasitic copepods.

Affiliations: 1: Department of Zoology, Rand Afrikaans University, P.O. Box 524, Aucklandpark, 2006, South Africa


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