Annachlamys subflabellata (Cox, 1927)
COX, L. R. 1927. Neogene and Quaternary Mollusca from the Zanzibar Protectorate. In Anonymous (Eds.): Report on the Palaeontology of the Zanzibar Protectorate based mainly on the collection made by G. M. Stockley: 13-102, pls. 3-19. Published by Authority of the Government of Zanzibar. [p. 74, pl. 17, fig. 4]
1927 Pecten (Oopecten) subflabellatus Cox, 1927
L. R. Cox, 1927, plate 17.
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«(in allusion to its close affinity to P. flabellatus).
Specific characters:— Shell of medium size, rather inequilateral (more elongate at posterior end), broadly fan-shaped, with the length considerably in excess of the height; left valve but slightly inflated, with about 17 depressed-rounded, simple radial costae, separated by narrower interspaces; costae and interspaces crossed by fine, regular, close-spaced concentric threads; ears large, obscurely ribbed; hinge-margin long, about half the length of the shell; interior with broad, rather concave ribs corresponding to the external interspaces; right valve unknown.
Localities:— Zanzibar 108a and 108b. Material:— The holotype (L. 43996), a left valve from Loc. 108a, and two paratypes, also left valves (L. 43995, L.43997). Dimensions:— (Holotype) length 46mm., height 40.5mm., inflation 6.5mm. Comparison with other species:— P. subflabellatus is closely related to P . flabellatus Lamarck (leopardus Reeve) and its ally, P. macassarensis Chenu, differing from either in the greater number of its costae. Most modern authors have referred these species to Aequipecten; this view cannot be upheld, since P. flabellatus and allied forms (including P. reevei Adams) possess only a very shallow sinus below the right anterior ear and no trace of a ctenolium; the right valve, moreover, is usuallly very much more inflated than the left. It is, therefore, obvious that these species cannot be placed in any subgenus of Chlamys, but are much closer to Pecten s. str. They seem to be very appropriately referable to Sacco's section Oopecten, as that author himself pointed out.» LESLIE REGINALD COX, 1927
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«1927. Pecten (Oopecten) subflabellatus Cox, (13), p. 74, PI. 17, fig. 4.
Material:— Sample REL.2080 (Zanzibar, Nduli road-cutting, Upenje Hill, top of exposure; L. Miocene), 2 specimens; sample PEK.5503 (Mafia I., Ngombeni quarry; L. Miocene), 1 specimen; sample APT.82 (Zanzibar, spoil from well N. of road at Kwcbona; L. Miocene-with Lepidocyclina) , 2 specimens; sample RBH.783 (Mafia I., limestone on sand-rock point, Kilindoni; L. Miocene), 1 specimen; sample REL.3041 (Kenya, Kilifi Creek, basal 20 ft. of 50 ft. cliff, headland on S. side of creek ½ mile W. of northern ferry landing; L. Miocene), 14 specimens; sample PEK.5436 (Pemba I., Tibirizi quarry; Pliocene), 1 specimen.
Remarks:— The beds at the original localities (Kizimkazi and Dunga on Zanzibar) are actually of L. Miocene age (not Pliocene) as the faunas are associated with Lepidocyclina; the species is therefore to be regarded as ranging from L. Miocene to Pliocene.» EAMES, F. E. & L. R. COX. 1956. Some Tertiary Pectinacea from East Africa, Persia, and the Mediterranean region. Proceedings of the Malacological Society of London, 32 (1): 1-68, pls. 1-20. [p. 52]
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