Amphilius korupi Skelton 2007

Diagnosis: adipose fin moderate size, origin behind pelvics; colour uniform dark brown, caudal fin black with narrow yellow band across base and distal edge; eyes widely spaced (interorbital width 2.6-4.0 times orbit diameter); origin of dorsal fin one head length behind head; dorsal fin base before origin of pelvic fins; dorsal fin leading ray extends full length of leading edge of fin; caudal fin with 6+7 principal rays; caudal peduncle 0.9-1.4 times longer than deep; snout relatively short, less than half length of head, equal to or shorter than post-orbit length; eyes placed equidistant from hind margin of head and tip of snout (mid-way along head) or nearer to tip of snout (Ref. 81646).Description: body depressed anteriorly, caudal peduncle compressed; head length 3.6-4.2 times in SL; head depressed, obtuse anterior edge, skin smooth and fleshy; branchiostegal membrane deeply cleft in ventral mid-line; mouth subterminal, broad; lips fleshy; teeth caniniform in pad on premaxillae and narrow band on mandible; barbels filamentous, maxillary longest, extending to above pectoral base; snout relatively short, less than half length of head; nostrils on anterior half of snout, separated; eyes small, widely spaced (interorbital width 2.6-4 times orbit diameter), confluent with head (no free orbital margins); caudal peduncle short, 6.4-8.4 times in SL, relatively deep, 0.9-1.4 times longer than deep; fins broad and well-developed; origin of dorsal one head length behind head; dorsal fin base to above pelvic base; dorsal fin rectangular with straight hind edge, leading ray shorter than leading edge of fin; pectoral fins broad and rounded, not reaching pelvic fins, leading ray broadly pectinate and padded; pelvics not reaching base of anal, leading ray pectinate and padded; anal fin short and slender, extending to or close to base of caudal; caudal fin large and rectangular, trailing edge emarginate, base with semi-oval fleshy pad; adipose fin low and elongate, from behind pelvics to procurrent ridge of caudal fin; anus and genital pore close behind pelvic fin base (Ref. 81646).Coloration: uniformly dark brown dorsally and laterally; fin rays dark brown, membranes clear; ventral surface from head to anal fin light brown; caudal fin with large medial black spot with cream-yellow surrounds along base and distal edge (Ref. 81646).

Dorsal spines (total): 0; Analspines: 0

(Fig. 5)

Synonymy. Amphilius sp. [cf. A. brevis Boulenger, 1902 ]: Reid, 1989, 57.

Other material. MRAC 93-072-P-0768-0769, 2, SL 43.5-59 mm, Limbe River, Moussaka, CDC Camp, Limbe region , Cameroon , 04° 01'N , 09° 12'E , E. van den Bergh, 11 April 1993 .

Diagnosis. A. korupi differs from A. pulcher , A. dimonika and A. mamonekensis in colour pattern, especially the large dark brown or black spot with yellow surrounds on the caudal fin, in having the eyes nearer the tip of the snout, longer barbels, and in being a more deep bodied species with a shorter, deeper caudal peduncle. It is most similar to A. nigricaudatus from the WCA region and A. brevis from the Congo River system. It shares with both these species similar overall morphology including a short head, eyes closer to tip of snout than to hind margin of head, long slender barbels and an emarginate caudal fin with 6+7 Principal rays and a fleshy epidermal fold across the caudal base. It differs from A. brevis in the position of the dorsal fin that reaches to above but not beyond the origin of the pelvic fins (in A. brevis the dorsal base extends beyond the origin of the pelvic base), and from A. nigricaudatus in that the anal fin is closer to the caudal fin base. Two specimens from further south in Cameroon (see other material MRAC 93-072-P-0768-69) appear close to A. korupi , but differ from the others examined in being more heavily built, have an adipose fin that is long low and confluent, and have longer barbels.

Description. Measurements and ray counts given in Table 3. Body stout and depressed anteriorly, caudal peduncle compressed. Head depressed, smooth above, broad and bluntly rounded in front, length 3.6-4.2 times in SL; branchiostegal membrane deeply cleft in ventral midline; mouth subterminal, broad, lips fleshy; teeth small, caniniform in square laterally tapered pad on premaxillae and narrow band on the mandible; barbels filamentous, maxillary longest, extending from lateral edge of upper lip to above pectoral base; mandibular barbels positioned laterally on ventral side of mandible, anterior pair medial but close to posterior pair, reach edge of branchiostegal membrane, posterior pair at lateral edge of mandible, reaching beyond branchiostegal membrane; snout relatively short, less than half length of head, nares on anterior half of snout, separated; eyes nearer tip of snout than posterior margin of head, small, widely spaced (interorbit 2.6-4 times orbit diameter), orbits confluent with head surface. Caudal peduncle short, 6.4-8.4 times in SL, relatively deep, 0.9-1.4 times longer than deep. Fins broad and well developed, origin of dorsal one head length behind head, dorsal base to above origin of pelvic base; dorsal obtusely rectangular with straight hind edge, leading ray shorter than leading edge of fin; pectoral fins broad and rounded, not reaching pelvic fins, leading ray pectinate and padded; pelvic fins not reaching base of anal, leading ray pectinate and padded; anal short and slender, extending to or close to base of caudal; caudal large and rectangular, trailing edge emarginate, caudal peduncle base with simple semi-oval epidermal fold; adipose fin low and elongate, or semi-elipsoid, base from before anal origin to behind anal base meeting procurrent ridge of caudal fin. Skin smooth; lateral line with irregular pores to base of caudal. Anus and genital pore close behind pelvic fin base. Reaches 65 mm SL.

Coloration. Uniformly dark brown dorsally and laterally, fin rays dark brown, membranes clear. Ventral surface from head to anal fin light brown. Caudal fin with large medial black spot and cream-yellow bands along base and distal edge.

Distribution. Coastal streams of north-western Cameroon including tributaries of the Cross, the Akpa-Korup and Ndian Rivers (Fig. 3).

Etymology. Named for the Korup National Park, Cameroon, where the species occurs.

Amphilius korupi és una espècie de peix de la família dels amfílids i de l'ordre dels siluriformes.

Amphilius korupi is a species of catfish in the genus Amphilius. It is found in coastal streams in northwestern Cameroon. Its length reaches 6.5 cm.

Amphilius korupi es una especie de peces de la familia Amphiliidae en el orden de los Siluriformes.

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Amphilius korupi Amphilius generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Amphiliidae familian.

科氏平鰭鮠，為輻鰭魚綱鯰形目平鰭鮠科的其中一種，為熱帶淡水魚，被IUCN列為瀕危保育類動物，分布於非洲喀麥隆西北部沿岸淡水流域，體長可達6.5公分，棲息在底層水域，生活習性不明。