Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . es between Stebbings species and Geryon trispino-sus (Herbst). He concluded that There seems to be little doubt that ischurodousshould become a synonym of trispinosus\ Among the material of Geryon examined from the collections of the SouthAfrican Museum was a single small specimen taken off Natal in 700-680 m andreported by Kensley (1977: 163) as Geryon sp. It proved to be identifiable withGeryon ischurodous Stebbing. In our opinion, Stebbings species did not belong in the genus Geryon. Inseeking to place it in anothe
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . es between Stebbings species and Geryon trispino-sus (Herbst). He concluded that There seems to be little doubt that ischurodousshould become a synonym of trispinosus\ Among the material of Geryon examined from the collections of the SouthAfrican Museum was a single small specimen taken off Natal in 700-680 m andreported by Kensley (1977: 163) as Geryon sp. It proved to be identifiable withGeryon ischurodous Stebbing. In our opinion, Stebbings species did not belong in the genus Geryon. Inseeking to place it in another genus, we looked through a variety of accounts ofdeep-sea crabs in the literature. Among these sources was the recent account byGuinot & Richer de Forges (1981a, 1981&) of deep-sea crabs from the Indo-Pacific. The similarity between the South African material of Geryon ischurodousand a species taken in 600 m off the New Hebrides and described by Guinot &Richer de Forges as Carcinoplax eurysternum was immediately recognized. SOUTH AFRICAN SPECIES OF GERYON 79. Fig. 1. Carcinoplax ischurodous (Stebbing), Natal. Male, cl 4,1 mm. Guinot & Richer de Forges (1981b: 251) pointed out that few species ofCarcinoplax have only two teeth on the anterolateral margin of the carapace, andthat few species have one of these teeth as an exorbital spine. Geryon ischurodoushas but two anterolateral teeth on the carapace, and one of these is a well-developed exorbital tooth (Fig. 1). Further, the figures of C. eurysternumprovided by Guinot & Richer de Forges show a species with an inner spine on themerus of the cheliped and an inner and outer spine on the carpus of the cheliped,with the inner carpal spine bifurcate. The southern African specimens aresimilarly spined and, although the smaller lacks the secondary spine on the innercarpal spine, it is clearly shown on the type by Stebbing (1923, pi. 11). However,the gonopods of the two species are slightly different—compare Stebbings figure(1923,
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