Morphology Data of Campylomormyrus compressirostris
Identification keys
Main Ref. Pellegrin, J., 1924
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales cycloid scales

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).

Ease of Identification

Meristic characteristics of Campylomormyrus compressirostris

Lateral Lines Interrupted: No
Scales on lateral line 90 - 90
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 16 - 16
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 0 - 0
Soft-rays total 30 - 30
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 36 - 36

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   12 - 12
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     0
Soft-rays   6 - 6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Bailly, Nicolas
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17