Campylomormyrus numenius

Campylomormyrus numenius (Boulenger, 1898)

Original Published Description:

Boulenger, G. A. (1898).  Matériaux pour la faune du Congo. Poissons nouveaux du Congo. Première Partie. Mormyres. Annales du Musee du Congo (Ser. Zoology). 1, 1-20, Pls. 1-9.
 
Languages: English

Overview

General Description

From Boulenger 1909, pp. 124-125.

Depth of body 4 2/3 to 5 times in total length, length of head 2 2/5 to 2 1/2 times. Upper profile of head convex; snout produced into an extremely long, compressed tube, feebly curved downwards, its length, in the adult, 5 to 5½  times postocular part of head, and 20 times its least depth, which equals diameter of eye; latter 2/3 interorbital width; lower jaw with a compressed dermal appendage nearly as long as eye; teeth conical, 7 in upper jaw, 4 or 6 in lower. Dorsal 27-34, originating above 8th or 9th ray of anal, its length 1 2/3 to 1 3/4 times in its distance from head. Anal 29-37, equally distant from base of ventral and from base of caudal. Pectoral pointed, less than 1/2 length of head, almost twice as long as ventral, and extending almost to extremity of latter. Caudal scaled with obtusely pointed lobes. Caudal peduncle 3 times as long as deep, 1/3 to 1/2 length of head. 76-81 scales in lateral line, 15-18 / 24-25 transverse series on body, 16-19 / 15-18 in transverse series between dorsal and anal, 16 round caudal peduncle. Pale brownish above, whitish beneath.

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

Description

Diagnostic Description

Distinguished from Campylomormyrus curvirostris, another very long-snouted species by having a feebly curved (versus strongly curved in C. curvirostris) snout, with its depth approx. 5% of its length (versus more than 8%), and a shorter caudal peduncle (3x as long as deep versus 4x).  Lobes of caudal fin are obtusely pointed in C. numenius, while more distinctly pointed in C. curvirostris.  (from Boulenger 1909.)

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

Size

to 610 mm TL

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

Taxonomy

  • Gnathonemus ibis Boulenger 1902 (synonym)

References

Boulenger, G. A. (1898).  Matériaux pour la faune du Congo. Poissons nouveaux du Congo. Première Partie. Mormyres. Annales du Musee du Congo (Ser. Zoology). 1, 1-20, Pls. 1-9.
 
Boulenger, G. A. (1899).  A revision of the genera and species of fishes of the family Mormyridae. Proceedings of the General Meetings for Scientific Business of the Zoological Society of London. 1898, 775-821.
Boulenger, G. A. (1909).  Catalogue of the Fresh-Water Fishes of Africa in the British Museum (Natural History). I, 373. London: British Museum (Natural History).
 
David, L., & Poll M. (1937).  Contribution à la faune ichthyologique du Congo Belge: Collections du Dr. H. Schouteden (1924-1926) et d'autres récolteurs. Annales du Musée du Congo Belge (Série 1). 3 (fasc. 5), 189–294.
 
Feulner, P. G. D., Kirschbaum F., & Tiedemann R. (2008).  Adaptive radiation in the Congo River: An ecological speciation scenario for African weakly electric fish (Teleostei; Mormyridae; Campylomormyrus). Journal of Physiology-Paris. 102(4-6), 340 - 346. Abstract
Feulner, P. G. D., Kirschbaum F., Mamonekene V., Ketmaier V., & Tiedemann R. (2006).  Electrophysiological and molecular genetic evidence for sympatrically occuring cryptic species in African weakly electric fishes (Teleostei: Mormyridae: Campylomormyrus). Biology Letters Evolutionary Biology. 39, 198-208. Abstract
 
Feulner, P. G. D., Kirschbaum F., Mamonekene V., Ketmaier V., & Tiedemann R. (2007).  Adaptive radiation in African weakly electric fish (Teleostei: Mormyridae: Campylomormyrus): a combined molecular and morphological approach. Journal of Evolutionary Biology. 20(1), 403 - 414. Abstract
Feulner, P. G. D., Plath M., Engelmann J., Kirschbaum F., & Tiedemann R. (2009).  Electrifying love: electric fish use species-specific discharge for mate recognition. Biology Letters. 520927419392041142915996351451455587020220191(2111608411683569925-62Pt 2107), 225 - 228. Abstract
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. (1939).  Les Poissons du Stanley-Pool. Annales du Musée du Congo belge. C.–Zoologie Série I.. 4, 1-60.
 
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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