Enteromius nounensis (Van den Bergh & Teugels, 1998)

Family:  Cyprinidae (Minnows or carps), subfamily: Smiliogastrinae
Max. size:  5.35 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater; pH range: 6 - 6.5,
Distribution:  Africa: Lower Guinea endemic, known from the Sanaga River basin (Ref. 27690, 81639) and the Wouri basin (Ref. 81639) in Cameroon.
Diagnosis:  Dorsal spines (total): 1-1; Dorsal soft rays (total): 10-10; Anal soft rays: 8-8; Vertebrae: 32-33. Diagnosis: mouth subterminal; barbels absent; lateral line incomplete with 4-6 perforated scales; 21-25 scales in lateral line; 10-12 circumpeduncular scales; 2.5-3 scales between lateral line and pelvic fin insertion; gill rakers present along lower limb of first gill arch; dorsal fin with straight posterior margin; last simple ray of dorsal fin forming unserrated spine (Ref. 27690, 81639). Description: small-sized, dorsal profile convex (Ref. 81639). Scales with divergent striae; lateral line incomplete: with 4-6 perforated scales; 21-25 scales in lateral line; 3.5-4 scales between lateral line and dorsal fin origin; 4.5-5.5 scales between lateral line and mid-belly; D:III,8; A:III,5; P:14-15; V:7-8; dorsal fin with straight border; last simple ray ossified, not serrated (Ref. 27690, 81639). Coloration: ground color silvery white, with a faint dark mid-lateral band (Ref. 27690, 81639) from above pored scales to base of caudal fin (Ref. 27690). Upper part of back olive yellow; black spot behind opercle; ventrally thin black line from anal fin to caudal fin base; dorsal, pectoral and caudal fins with red tint; specimens from turbid waters generally darker (Ref. 27690, 81639).
Biology:  Occurs in small and shallow rivulets (0.1- 0.5 m deep) with a muddy or sandy bottom, a gallery of small trees, shrubs and high grasses and a moderate water current (Ref. 27690).
IUCN Red List Status: Least Concern (LC); Date assessed: 16 February 2009 Ref. (130435)
Threat to humans:  harmless


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