Amphilius longirostris (Boulenger, 1901)
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Family:  Amphiliidae (Loach catfishes), subfamily: Amphiliinae
Max. size:  8.2 cm SL (male/unsexed)
Environment:  demersal; freshwater,
Distribution:  Africa: Sanaga to OgoouĂ© basins in Cameroon, Equatorial Guinea and Gabon (Ref. 81646) and upper Louesse (Kouilou-Niari basin) in Republic of Congo (Ref. 92841). Also in the Dja (Sangha tributary, middle Congo River basin) (Ref. 81646).
Diagnosis:  Dorsal spines (total): -0; Dorsal soft rays (total): 7; Anal spines: -0. Diagnosis: caudal fin with 7+8 principal rays; caudal peduncle 1.6-2 times longer than deep; snout longer than post-orbit length; eyes placed distinctly nearer to hind margin of head than to tip of snout (Ref. 81646). Description: body stout, depressed anteriorly, tapered posteriorly; head 3.6-4.6 times in SL, depressed, flat above and below, anterior edge obtusely blunt; mouth subterminal; lips fleshy; teeth caniniform, in deep narrow patch on premaxillary and band on maxillary; maxillary barbels shorter than head length; snout long, 0.6-0.65% HL; nostrils in mid-snout; eyes small, relatively closely spaced, interorbital width 1.3-2.5 times orbit diameter, confluent with head (no free orbital margins); large sexually mature males develop swollen snouts (pre-orbital region); caudal peduncle relatively long, 5.3-6.5 times in SL, and slender, depth 1.6-2.3 times in length; fins well-developed; dorsal fin with 1 unbranched and 6 branched rays, rectangular with straight edges, leading ray forms entire leading edge; pectoral fins with 1 unbranched and 8-9 branched rays, fan-like with padded pectinate leading ray, not reaching pelvics; pelvic fins with 1 unbranched and 5 branched rays, entirely posterior to dorsal, not reaching anal base, leading ray padded and pectinate; anal fin with 2-3 unbranched and 5-7 branched rays, short, not reaching caudal, with 2-3 unbranched rays and 5-7 branched rays; caudal fin shallowly forked or emarginate, lobes of equal size, fin base covered with fleshy pad; adipose fin short and rounded (ellipsoid), above anal; anus adjacent to genital pore, positioned nearer to pelvic fins than to anal base (Ref. 81646). Coloration: mottled with grey-black spots and vermiculated marks over dorsal and lateral surfaces; 5 lighter dorsal saddles from behind head to base of adipose fin, the light areas partly filled with brown markings; fin rays brown with darker bands; caudal with dark base, a medial band and a distal band; ventral surface from head to anus light brown or cream (Ref. 81646).
Biology:  Maximum total length reported 14.0 cm (Ref. 3818).
IUCN Red List Status: Least Concern (LC); Date assessed: 16 February 2009 Ref. (123251)
Threat to humans:  harmless
Country info:  Known from the Sanaga (Ref. 26632, 81646), Nyong, Lokoundje, Ntem (Ref. 81646) and Kienke (=Kribi) (Ref. 51193, 81646). Also known from the Dja (middle Congo River basin) (Ref. 46233, 51193, 81646). Also Ref. 3818.

Entered by: Sa-a, Pascualita - 16.04.94
Modified by: Musschoot, Tobias - 06.10.17
Checked by: Sa-a, Pascualita - 10.05.94

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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