. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Heft 1/3 13/1962 Fishes of Northwestern Cameroons 179. Fig. 10. Tilapia steinbachi, paratype. The teeth of the jaws are very fine, with slender shafts, in two series (or with a few teeth of a third) in the upper jaw, three in the lower; outer bicuspid, inner very small, tricuspid. The pharyngeal teeth are slender and crowded, the dark brown tips of the lower posterior forming a zone at least half the dentigerous area in extent. The tips of the posterior teeth are bl
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Heft 1/3 13/1962 Fishes of Northwestern Cameroons 179. Fig. 10. Tilapia steinbachi, paratype. The teeth of the jaws are very fine, with slender shafts, in two series (or with a few teeth of a third) in the upper jaw, three in the lower; outer bicuspid, inner very small, tricuspid. The pharyngeal teeth are slender and crowded, the dark brown tips of the lower posterior forming a zone at least half the dentigerous area in extent. The tips of the posterior teeth are blunt and rounded, but they are slender, quasi- cylindrical, not molariform; among them in the brown zone are many whose brown tips have been worn off, probably the older teeth; the teeth of the anterior zone slope backwards and have bevelled crowns. The posterior upper pair of toothed pharyngeals are likewise enlarged, left and right forming together an almost discoidal toothed surface. Scales of cheek in 3 or 2 horizontal series. Gill-rakers short, 3+1+21 or 3+1 + 19. Scales cycloid, 31 in the series including the upper lateral line, 3V'2 between origin of dorsal and lateral line, 4 between pectoral and pelvic bases. D XVII 11 (in the paratype a short simple 12th ray close to the 11th); last spine of (in both). A III 10, third spine stouter than and nearly as long as last dorsal. Caudal fin damaged, not scaly. Colour as preserved uniform; no ";, at this stage at least. A few vague spots on the vertical fins. The intestine is long, with 7—9 coils, full of dark mud. The stomach contains very fine sand mixed with organic debris. The sand would 12*. 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 Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschun
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