IUCN threat status:

Least Concern (LC)

Comprehensive Description

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General Description

Translated from original description by J. Pellegrin (1901)

Body depth contained 4 times in length (minus the caudal), the length of the head 4½ times in length. HL noticeably longer than its depth, dorsal profile rounded, convex. Snout a little less than 1/3 HL. Mouth situated at the level of the ventral border of eye, its width slightly inferior to the snout length. Teeth somewhat scalloped, 5 / 6. Chin with moderately swelling. Eye diameter ½ snout length, 1/7 HL. Dorsal fin composed of 24 or 25 rays beginning above the 6th anal ray; the length of its base equal to a little more than ½ the distance that separates it from the head. Anal fin with 29 to 32 rays, its base about equal to the distance that separates its first ray from the origin of the pelvic fin. The rounded pectoral fin is 2/3 HL and extends beyond the base of the pelvic. Pelvic fin a little more than ½ length of the pectoral. Caudal mostly covered with scales, its lobes elongate and rounded. Caudal peduncle is a little more than 2 times longer than deep, 2/3 of HL, with 8 circumpeduncular scales. Lateral line with 57 scales. Uniformly chocolate brown.

D. 24-25, A. 29-32, P. 10, V.6, L.lat. 57, L. transv. 10 / 14

No. 90 — 8 and 9. Coll. Mus. Congo Thollon.

Total length: 225 and 215 mm.

This species is similar to Gnathonemus leopoldianus Boulenger from Lac Leopold II, but has only 8 scales around the caudal peduncle, similar to G. moorii Günther of the Ogooué and Lower Congo from which it differs by its longer body and more numerous scales (57 instead of 43-49) and similar to G. schilthuisiae Boulenger of Lac Leopold II from which it differs by its shorter dorsal and anal fins, its barely visible chin swelling, and its smaller eye and coloration.

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© Pellegrin, J.; Sullivan, John P.

Source: Africhthy

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