. Bulletin of the British Museum (Natural History), Geology. FOSSIL DENTICIPITID FISHES FROM EAST AFRICA 7 Age. Uncertain but probably middle to late Tertiary. Description. la general appearance, Palaeodenticeps bears a striking resemblance to Denticeps. This overall similarity extends to a number of osteological characters (see above). The scales along the dorsal mid-line form a clearly demarcated ridge and there is a distinct line of keeled scutes along the belly ; about twenty scutes, extending from the level of the posterior preopercular margin to a short distance from the anal fin, form t
. Bulletin of the British Museum (Natural History), Geology. FOSSIL DENTICIPITID FISHES FROM EAST AFRICA 7 Age. Uncertain but probably middle to late Tertiary. Description. la general appearance, Palaeodenticeps bears a striking resemblance to Denticeps. This overall similarity extends to a number of osteological characters (see above). The scales along the dorsal mid-line form a clearly demarcated ridge and there is a distinct line of keeled scutes along the belly ; about twenty scutes, extending from the level of the posterior preopercular margin to a short distance from the anal fin, form this ventral keel. The first ten pairs of ribs are intimately united with the scutes but the last three pairs are apparently free ventrally. ?PC ?sc. ?UH BRST Fig. 2. Palaeodenticeps tanganik'ae sp. nov. Outline drawing of the syncranium, from the holotype ( x 10). P. 42610. BRST., branchiostegal rays ; CL., cleithrum ; COB., circumorbitals ; EX., extra- scapula ; F., frontal; IOP., interoperculum ; M., maxilla ; N., nasal; OP., operculum P., parietal; PC, postcleithrum ; PM., premaxilla; POP., preoperculum; PS., parasphenoid ; PT., posttemporal; SC, supracleithrum ; SOB., supraorbital ; SOP., suboperculum ; ?UH., urohyhal (?) As in Denticeps, the postero-ventral angle of the preoperculum is divided and forms a double projection fringed with denticles. Slightly posterior to the base of the division, there is a round depression which resembles an opening to the lateral line tube. No such pore is mentioned or figured in the description of Denticeps. The divided angle of the preoperculum is not markedly protracted in Palaeodenticeps ;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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