. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 66 ANNALS OF THE SOUTH AFRICAN MUSEUM A 15 longitude 20 2J - t MODERN \wR + \ 20- ++ } WB ?o J- +H- \OR ++ \ 30- •'A + i. Fig. 45. Distribution of Ruggieria (Brady, 1880). A. Modern sites. B. Relict sites. See Fig. 7 for abbreviations. Keen (1975) recorded eight Recent species of the genus from the continental shelf off West Africa (although he suspected that they are in fact not congeneric with the holotype): R. triangulata Omatsola, 1972 (20-80 m), R. beninensis Omatsola, 1972 (20
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 66 ANNALS OF THE SOUTH AFRICAN MUSEUM A 15 longitude 20 2J - t MODERN \wR + \ 20- ++ } WB ?o J- +H- \OR ++ \ 30- •'A + i. Fig. 45. Distribution of Ruggieria (Brady, 1880). A. Modern sites. B. Relict sites. See Fig. 7 for abbreviations. Keen (1975) recorded eight Recent species of the genus from the continental shelf off West Africa (although he suspected that they are in fact not congeneric with the holotype): R. triangulata Omatsola, 1972 (20-80 m), R. beninensis Omatsola, 1972 (20-30 m), R. lekkii Omatsola, 1972 (20-30 m), R. nigeriana Omatsola, 1970 (20-30 m), R. martinssoni Omatsola, 1972 (0-110 m, 10-60 m living), R. tricostata Omatsola, 1972 (20-30 m), R. boldi Keen, 1975 (20 m), and R. leonensis Keen, 1975 (sandy sediments, 60-110 m). The last-named is very similar in shape, ornamentation and internal features to R. cytheropteroides. It differs in having a faint surface reticu- lation, a weak AM ridge, and in being slightly more triangular in lateral outline over the anterior cardinal angle. Clearly, the two species are closely related. Babinot & Kouyoumontzakis (1986) have recorded three of the West Africa taxa from modern sediments off the mouth of the Congo River: R. lekkii (38-44 m); R. martinssoni (38 m); and Ruggieria aff. R. triangulata (38 m). Distribution Brady (1880) recorded this species from 'Challenger' Station 142 off the Cape of Good Hope (300 m). Ruggieria cytheropteroides (combined modern and relict specimens) is overall the second most abundant ostracod taxon (after Pseudokeijella lepralioides (Brady, 1880)) on the south-western African continental shelf (22% of all specimens recorded in the present study, 39% of specimens in the samples containing the dominant taxa). Modern specimens extend over a latitudinal range of 15 degrees between 19° and 35°S (Figs 4, 45A, 46). Off the Cape Peninsula (Fig. 46C) the species occurs i
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