Campylomormyrus alces

Campylomormyrus alces (Boulenger, 1920)

Original Published Description:

Boulenger, G. A. (1920).  Poissons recueillis au Congo Belge par l'expédition de Dr C. Christy. Annales du Musée du Congo belge. Zoologie. Série I, Matériaux pour la faune du Congo. 2, 38.
 
Languages: English

Overview

General Description

Taken from Boulenger (1920):

Depth of body 3 to 3½ times in the total length, length of head 5 or 6 times. Tubular snout short and highly compressed, directed downward almost perpendicular to the axis of the body; length of snout about 1 1/2 times that of the post-ocular head distance, its smallest vertical diameter 2½ to 3 times its length and approximately equal to the diameter of the eye;  fleshy chin barbel tapers to a fine point, its length equal to the diameter of the eye or a little less; teeth small, truncated, 3 or 4 in the upper jaw, 4 on the bottom. Dorsal 31-34, beginning above the sixth to eighth ray of the anal, the length of its base equaling about two-thirds of its distance from the head. Anal 33-35, nearer the tail than the base of the ventral. Pectoral pointed, as long as the head, extending back beyond the ventral, measuring twice its length. Caudal fin scaly at the base, lobes long and pointed. Caudal peduncle 3 times as long as high, as long as head or slightly shorter. 70 to 75 scales along the lateral line, 16-18/16-18 in transverse series on the body, 14-15/12-13 between the dorsal and anal, 12 around caudal peduncle. Dark brown above, silvery white below; dorsal fin blackish in front, anterior margin extended into a yellow oblique band extending from its base in the lateral line; a black band on each lobe of the caudal fin. Total length from 255 to 330 millimeters.  Differs from G. elephas [Campylomorymyrus elephas] by its much shorter snout.

Author(s): Boulenger, G.A.
Rights holder(s): Boulenger, G.A.

Description

Electric Organ Discharge

EOD unknown.

Author(s): Sullivan, John P.
Rights holder(s): Sullivan, John P.

Ecology and Distribution

Distribution

Upper Congo Rapids from Boyoma Falls (Stanley Falls), Kisangani, D.R. Congo to Ubundu (ex-Ponthiereville). Also some records from Stanley Pool and Lower Congo at Matadi. Poll (1967) reports and illustrates this species (or something resembling it) from the rapids of the Luachimo River near Dundo, Angola. See occurrence records on FishBase.

Author(s): Sullivan, John P.
Rights holder(s): Sullivan, John P.

Ecology

Rheophilic species.

Author(s): Sullivan, John P.
Rights holder(s): Sullivan, John P.

Taxonomy

  • Gnathonemus campylomormyrus (synonym)

References

Boulenger, G. A. (1920).  Poissons recueillis au Congo Belge par l'expédition de Dr C. Christy. Annales du Musée du Congo belge. Zoologie. Série I, Matériaux pour la faune du Congo. 2, 38.
 
Harder, W. (2000).  The Mormyridae and other Osteoglossomorpha (CD-ROM). World Biodiversity Database, CD-ROM Series. 2000, New York: Springer Verlag, ETI-UNESCO.
Poll, M. (1967).  Contribution à la Faune Ichthyologique de l'Angola. Publicações Culturais. 381. Lisbon: Companhia de Diamantes de Angola.
 
Poll, M., Gosse J. - P., & Orts S. (1982).  Le genre Campylomormyrus Bleeker, 1874, étude systematique et description d'une espece nouvelle (Pisces, Mormyridae). Bulletin de l'Institut Royal des Sciences de Belgique Biologie. 54, 1–34, Pls. 1–13.
 
Roberts, T. R., & Stewart D. J. (1976).  An ecological and systematics survey of fishes in the rapids of the Lower Zaïre or Congo River. Bulletin of the Museum of Comparative Zoology. 147, 239–317.
 
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Boulenger1920_Poissons recuellis au Congo Belge.pdf4057.52010-11-10T20:23:13Z
Poll_1967_optimized.pdf4223.82010-12-06T21:13:01Z
Roberts & Stewart 1976.pdf2731.92010-12-07T20:24:40Z
poll_gosse__orts_1982.pdf1048.62012-09-26T23:52:34Z