Morphology Data of Mormyrus lacerda
Identification keys
Main Ref. Skelton, P.H., 2001
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth terminal
Type of scales cycloid scales

Diagnosis: dorsal fin greater than twice length of anal fin; dorsal origin nearer tip of snout than caudal fin base; snout 3-3.2 times in head length; caudal peduncle more than 4 times in standard length (Ref. 52193).

Description: dorsal fin long; snout elongated (Ref. 13337). Body moderately elongated and compressed; dorsal fin extended, origin in advance of pelvics; caudal forked with partially scaled, rounded lobes; head and forebody smoothly decurved; snout extended to about 1/3 of head, tapered; mouth terminal and relatively small; teeth bicuspid, 7—8 in upper jaw, 8—10 in lower; gill slits on sides only (Ref. 52193).

Coloration: greyish brown above, lighter below often with yellowish tinge (Ref. 52193).

Ease of Identification

Meristic characteristics of Mormyrus lacerda

Lateral Lines Interrupted: No
Scales on lateral line 80 - 90
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 22 - 26
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb


Dorsal fin(s)

Attributes extending over most of the back length
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 0
Soft-rays total 62 - 68
Adipose fin

Caudal fin


Anal fin(s)

Fins number 1
Spines total 0
Soft-rays total 18 - 21

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Torres, Armi G.
Modified by Bailly, Nicolas
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