Passarelli, J.K., D. Tang & L.G. Allen. (2021). A Redescription of Lepeophtheirus longipes Wilson, 1905 (Copepoda; Caligidae) Parasitic on Giant Sea Bass, Stereolepis gigas Ayres, 1859 (Polyprionidae), off California. Bulletin Southern California Academy of Sciences. 120(2):64-87. AUG 2021.
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Passarelli, J.K., D. Tang & L.G. Allen
2021
A Redescription of Lepeophtheirus longipes Wilson, 1905 (Copepoda; Caligidae) Parasitic on Giant Sea Bass, Stereolepis gigas Ayres, 1859 (Polyprionidae), off California.
Bulletin Southern California Academy of Sciences
120(2):64-87. AUG 2021
Publication
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The giant sea bass (GSB), Stereolepis gigas Ayres, 1859, is the largest teleost (exceeding 2 m in length and 200 kg in weight) and megacarnivore found in California kelp forest communities. Over?shing of GSB in the late 1920s crashed the population o? California and in 1996 it was classi?ed as an International Union for Conservation of Nature (IUCN) critically endangered species. Recently, three GSB were collected o? San Onofre, California and held at the Southern California Marine Institute in San Pedro. Two of the three GSB were infected with Lepeophtheirus longipes Wilson, 1905 (Siphonostomatoida; Caligidae), a poorly described species of parasitic copepod previously recorded from the GSB and purportedly on other ?sh hosts. In this study, a detailed redescription of the female and the ?rst description of the male of L. longipes are provided and all records of Lepeophtheirus longipes are reviewed. The latter revealed that L. longipes is host speci?c to GSB. Lepeophtheirus longipes is distinguished from its congeners by a combination of female characters that includes: (1) genital complex with prominent posterolateral lobes and is about half the length of the cephalothorax and just over two times longer than the cylindrical, indistinctly 2-segmented abdomen; (2) an antennule with a small conical process on the proximal segment; (3) maxillule with an outer conical process at the base of the dentiform process; (4) sternal furca with pointed and slightly splayed tines; (5) ?rst exopodal segment of leg 3 with a terminal spine; and (6) third exopodal segment of leg 4 with three unequal apical spines.
