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Mormyridae
Campylomormyrus compressirostris (Pellegrin, 1924)
EOL Text
demersal; freshwater
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| Rights holder/Author | Tobias Musschoot, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=67417 |
Not Evaluated
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| Rights holder/Author | Tobias Musschoot, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=67417 |
fisheries:
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| Rights holder/Author | Tobias Musschoot, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=67417 |
après Pellegrin 1924 :
La hauteur du corps est comprise 4 fois 1/5 dans la longueur, sans le museau et la caudale, la longueur de la tête, au niveau de Itœil, 5 fois 1/4. Le profil supérieur de la tête descend en une courbe accentuée. Le museau est prolongé en un long tube, fortement comprimé latéralement, dirigé en bas et un peu en avant; sa longueur fait 1 fois 2/3 la longueur de la partie postoculaire de la tête, son plus petit diamètre vertical est contenu 5 fois 1/3 dans sa propre longueur. Il y a au menton un appendice charnu, conique, mesurant environ la moitié du diamètre de l'œil; celui-ci est compris 4 fois 1/3 dans la longueur du museau, 2 fois 2/3 dans la région postoculaire, 1 fois environ dans l'espace interorbitaire. La bouche est excessivement petite, munie de 3 dents coniques en haut, de 4 en bas. On compte 90 écailles le long de la ligne latérale, 18 / 20 en ligne transversale, 16 / 17 entre le début de la dorsale et celui de fanale, 16 autour du pédicule caudal. La dorsale, de 30 rayons, commence au dessus du 10ième rayon de l'anaIe; la longueur de sa base est contenue 1 fois 3/4 dans la distance qui la sépare de la tête. L'anale, de 36 rayons, est un peu plus rapprochée du début de la caudale que dé celui de la ventrale. La pectorale, obtusément pointue, fait près du double de la ventrale et arrive vers le milieu de celle-ci. Le pédicule caudal est 4 fois aussi long que haut. La caudale, écailleuse à sa base, a ses lobes longs et pointus.
La coloration est brun olivâtre sur le dos, jaunâtre et plus claire sur les côtés et en dessous. Il existe des traces peu distinctes d'une large barre noire entre le début de la dorsale et l'anale. Les nageoires sont grisâtres.
D. 30; A. 36; P. 12; V. 6; Sq. 18/90/20
Un spécimen de Borna (embouchure du Congo) (Dr. SCHOUTEDEN). Longueur totale: 165 +25 = 190 millimètres.
Le Gnathonème à museau comprimé, se rapproche un peu du Gnathonemus rhynchophorus BOULENGER, aussi du Congo, mais il sten différencie par son corps plus allongé, son museau plus court, son appendice mentonnier plus réduit, son pédicule caudal plus grèle, ses écailles moins nombreuses en ligne transversale.
Le G. Christyi BOULENGER, de Léopoldville, se distingue aisément de l'espèce décrite ici par le nombre des écailles autour du pédicule caudal (12 au lieu de 16).
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| Rights holder/Author | Sullivan, John P., Pellegrin, J., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2606 |
Translated from original description in Pellegrin (1924), pp. 7-8.
Body depth 4 1/5 times into length, minus the snout and the tail, HL at eye 5 ¼ times. Upper head profile descends in a pronounced curve. Snout is extended into a long tube, strongly laterally compressed, pointed downward and a little forward, its length 1 2/3 times postocular HL, its smallest vertical diameter is contained 5 1/3 times in its own length. Chin bears a conical, fleshy appendage measuring about half the eye diameter. Eye goes 4 1/3 times in snout length, 2 2/3 in postorbital region, about 1 times in the interorbital distance. Mouth is particularly small, with 3 teeth above, 4 below. 90 scales along lateral line, 18 / 20 in transverse line, 16 / 17 between dorsal and anal origins, 16 around caudal penduncle. Dorsal with 30 rays, beginning above 10th anal ray; its base contained 1 ¾ times in the distance which separates it from the head. Anal with 36 rays, a little closer to the caudal origin than to that of the ventral. Pectoral obtusely pointed, extending to the middle of the latter. Caudal peduncle is 4 times as long as deep. Caudal, scaled at its base, has long and pointed lobes.
Color is olive brown on the back, yellowish and lighter on the sides and below. Indistinct traces of a large black bar between the dorsal and anal origins. The fins are grayish.
D. 30; A. 36; P. 12; V. 6; Sq. 18/19/20
A specimen from Boma (mouth of Congo) (Dr. Schouteden). Total Length: 165 +25 = 190 mm.
This Gnathonemus with compressed snout is somewhat close to Gnathonemus rhynchophorus Boulenger, also from Congo, but differs by its more elongate body, shorter snout, more reduced chin appendage, its narrower caudal peduncle, and fewer scales along the lateral line.
The G. Christyi Boulenger, of Leopoldville, is easily distinguished from the species described here by the number of scales around the caudal peduncle (12 instead of 16).
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| Rights holder/Author | Sullivan, John P., Sullivan, John P., Pellegrin, J., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2606 |
Africa: Marine Lower Congo (Ref. 42477), Lower Congo (Ref. 42510) and Malebo Pool (Ref. 41585) in the Democratic Republic of the Congo.
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| Rights holder/Author | Tobias Musschoot, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=67417 |
Dorsal spines (total): 0; Dorsal soft rays (total): 30; Analspines: 0; Analsoft rays: 36
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| Rights holder/Author | Tobias Musschoot, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=67417 |
19.0 cm TL (male/unsexed; (Ref. 42477))
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Tobias Musschoot, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=67417 |
Diagnosis: This species is different from Campylomormyrus rhynchophorus based on the following combination of characters: body more elongated, shorter snout, less developed mental lobe, fine caudal peduncle and less scales on the lateral line (Ref. 42477). It differs from Campylomormyrus christyi by more circumpeduncular scales, 16 vs. 12 (Ref. 42477).Description: Body depth 4.2 times in its length, without snout and caudal fin; head length 5.25 times in its length (Ref. 42477). Dorsal head profile clearly convex (Ref. 42477). Snout elongated, forming a long tube, laterally strongly compressed; its direction downward and slightly forward; its length 1.33 times in postocular length; its smallest diameter 5.33 times in its length (Ref. 42477). Mental lobe fleshy, conical, its length about half the eye diameter (Ref. 42477). Eye diameter 4.33 times snout length, 2.66 times in postocular length and about the same length of interorbital width (Ref. 42477). Mouth is very small; upper jaw with 3 conical teeth; lower jaw with 4 conical teeth (Ref. 42477). Caudal peduncle length 4 times its height (Ref. 42477). About 90 scales on the lateral line; 18/20 transversal scales; 16/17 scales between dorsal-fin origin and anal-fin origin; 16 circumpeduncular scales (Ref. 42477). Dorsal fin with 30 rays, anal fin with 36 rays (Ref. 42477).Colouration: Body is olive-brown on back, yellowish and more pale on flanks and ventral side (Ref. 42477). There are vague traces of a large black band between the origin of the dorsal fin and the origin of the anal fin (Ref 42477). Fins are greyish (Ref. 42477).
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Tobias Musschoot, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=67417 |