Overview

Comprehensive Description

General Description

Diagnosed by the following combination of characters: 12 circumpeduncular scales, a moderately elongate body, post-orbital standard length 3.2–4.4 times as long as deep; elongate snout, 1.8–2.5 times the post-orbital length of the head; and uniform dark coloration sometimes with a darkened band between dorsal and anal fins.

Snout tubular and very elongated, 19–31% of the standard post-orbital length and 1.3–2.5 times the post-orbital length of the head. The snout length may be especially elongate in individuals greater than 300 mm SL. Dorsal profile gently convex, then turning downward sharply between eye and end of opercle. Snout may be gently curved downward. Ventral profile of the head concave. Mouth terminal and small.Chin with moderately elongated submental filament, its length 0.8–1.77 times the diameter of the eye. Teeth, conical, three in the upper jaw, four in the lower. Nostrils close together, separated from the eye by 1.3–3.2 times the eye diameter, closer to the anterior border of the eye than to the end of the snout. Eye small, 3.6–4.95 times the post-orbital length of the head. Dorsal fin, 27–29% of the standard post-orbital length, with 28–32 rays; anal fin, 30–33% of post-orbital standard length, with 31–34 rays. Caudal peduncle length, 16.5–22.6% of standard post-opercular length, and 21–33% of caudal peduncle length. Twelve circumpeduncular scales; 76–82 lateral line scales; 21–22 scale rows above the lateral line,18 below the lateral line and above the pelvic fin. Caudal fin scaled, deeply forked. To 455 mm TL.

Coloration: uniform brown with a dark band between the anterior-most dorsal rays and anterior-most anal rays.

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Distribution

Range Description

A Lower Guinea endemic from the Sanaga River basin of Cameroon.
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Africa: Sanaga River (Ref. 3203).
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Endemic to the Sanaga River Basin of Cameroon.

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West-central Africa: Sanaga River basin, Cameroon.
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Physical Description

Size

Maximum size: 370 mm TL
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Max. size

37.0 cm TL (male/unsexed; (Ref. 3203))
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to 455 mm SL

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This is a demersal species.

Systems
  • Freshwater
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Environment

demersal; freshwater
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Life History and Behavior

Behavior

Electric Organ Discharge

EOD is triphasic, with a small P0. The overall duration is approximately one millisecond. The electric organ is of Type Pa.

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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Moelants, T.

Reviewer/s
Brummett, R., Mbe Tawe, A.N., Dening Touokong, C., Reid, G.M., Snoeks, J. Staissny, M., Moelants, T., Mamonekene, V., Ndodet, B., Ifuta, S.N.B., Chilala, A., Monsembula, R., Ibala Zamba, A., Opoye Itoua, O., Pouomogne, V., Darwall, W. & Smith, K.

Contributor/s

Justification
The species is widespread within the Central Africa assessment region and is assessed as Least Concern.
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Population

Population
No information available.

Population Trend
Unknown
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Threats

Major Threats
There is no information available on threats to this species.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
None known.
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