Tylochromis elongatus Stiassny, 1989
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Family:  Cichlidae (Cichlids), subfamily: Pseudocrenilabrinae
Max. size:  15.3 cm SL (male/unsexed)
Environment:  benthopelagic,
Distribution:  Africa: River Lualaba between Stanley Falls (=Wagenia Falls) and Kindu, in Democratic Republic of the Congo (Ref. 52307, 52346).
Diagnosis:  Dorsal spines (total): 14; Dorsal soft rays (total): 15; Anal soft rays: 7; Vertebrae: 28. Diagnosis: 15-16 gill-rakers along lower limb of first arch; 36-38 lateral line scales (count started on upper line and continued on lower line, including the intermediate scales); an extremely robust lower pharyngeal jaw with mill-like molariform teeth occupying 2/3 of dentigerous surface (Ref. 52346). Description: relatively slender; front of head slightly convex over eyes (Ref. 52307). Predorsal profile frequently interrupted by a slight thickening in interorbital region; deepest body depth along back lies well behind dorsal fin origin, often as far back as 7th-8th dorsal spine; lower jaw slightly inclined forming an angle of about 10 with horizontal when mouth is closed; lower pharyngeal jaw a robust and compact element with a heavily molariform dentition; lips well-developed but not notably thick or fleshy; gill rakers on lower limb of first branch short, stout and slightly crenate, epibranchial rakers on upper limb of first arch relative elongate; upper lateral line ends a little in front of end of soft dorsal, usually below 4th-5th ray from free end of fin; terminal canal bearing scales descends a row and continues for 1-2 scales; dorsal and ventral lateral line branches on caudal fin terminate somewhat short of fin periphery while median branch is shorter, usually extending only one half of fin length; dorsal fin spines increase gradually to 5th-6th and are then more or less equal in length; anal fin rounded; pectoral fins relatively short but extending in large individuals to level of spinous anal fin; first branched pelvic ray filamentous and slightly produced; caudal fin emarginate and finely scaled almost to periphery (Ref. 52346). Coloration: Preserved specimens: uniform light or dark brown, with a well-defined nape band and traces of 5-6 elongate vertical bands that reach down to well below midline; smoky brown dorsal fin spotted by numerous rows of small whitish maculae; no traces of anal fin maculae on any of the larger specimens (Ref. 52346).
Biology:  Probably a benthic macrophage (Ref. 52346). Seems to feed mainly on insects and insect larvae; maternal mouthbrooder that does not pair-bond (Ref. 52307).
IUCN Red List Status: Data deficient (DD); Date assessed: 16 February 2009 Ref. (120744)
Threat to humans:  harmless
Country info:   
 

Entered by: Sa-a, Pascualita - 05.03.94
Modified by: Musschoot, Tobias - 30.11.17
Checked by: Sa-a, Pascualita - 01.09.94

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