Heteromormyrus pauciradiatus Steindachner, 1866
Species overview
Small fish, body depth equal to head length, snout blunt, mouth subterminal, clearly below level of eye, caudal peduncle quite short and deep. Size observed: 175 mm SL.
H. pauciradiatus(measurements)
Taxonomic description
-Body moderately deep, body depth 27-28 % SL, laterally compressed, head length 23-27 % SL, head depth 23-24 % SL, back and belly slightly curved, front profile convex, tip of snout sloping steeper, slightly protruding mouth; gular profile slightly concave.
-Snout 19-26 % head length, 32-41 % postorbital length; postorbital length 61-64 % head length.
-Mouth small, subterminal, clearly in front of but below eye.
-Chin with moderate submental swelling, without appendage.
-Teeth notched (number not indicated in description).
-Nostrils circular, posterior on a level with lower margin of eye, anterior a little above, both midway between eye and end of snout.
-Eye small, its distance from outline of head equals its diameter.
-Opercular cleft curved, 36-39 % head length, 37-41 % head depth.
-Dorsal fin 18-20 fin-rays, its base 15-19 % head length, anal fin 23-24 rays, its base 28-22 % SL; D originating behind, ending before A, margins of D and A rather straight.
-Pectoral fin rounded, its base at lower half opercular cleft, extending to base of pelvic fin. V closer to P than to A.
-Caudal fin rounded, scaled lobes rounded, 1/2 as long as entire fin. 70 scales in lateral line, 20 scales round caudal peduncle.
-Caudal peduncle 15-18 % SL, its depth 9 % SL, 48-61 % its length.
-Coloration Uniform dark brown, numerous black dots all over the body.
Type locality
»Angola«, type of Vienna Museum, »Cabiri (Bengo river) Angola«, specimen BMNH.(Cabiri: about 08° 55 ‘ S 12° 35 ‘ E)
Distribution
»Angola (type locality)« NMW; »Cabiri (Bengo river) Angola; in July 1916 Dr. W. J. Ansorge« BMNH.
Remark:
This species originally is known only from a type in the NMW, Vienna, but there is another specimen in the BMNH, London. The data given here are based on both specimens.
Heteromormyrus pauciradiatus 2 [photo of type]
Heteromormyrus pauciradiatus 3 [photo of type]