Morphology Data of Brycinus imberi
Identification keys
Abnormalities
Main Ref. Paugy, D., 2003
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance always different morphology between mature adults
Different colors males alike females
Remarks Sexual dimorphism affecting anal-fin shape in adult males (Ref. 2880, 81279).

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section
Dorsal head profile clearly concave
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales cycloid scales
Diagnosis

Diagnosis: parietal fontanella absent in adults and porelinke in juveniles, disappearing with growth; snout short, comprised over three times in head length; dorsal-fin origin at same level as, or scarcely behind, pelvic-fin insertions; head narrow; adults medium-sized; sexual dimorphism affecting anal-fin shape in adult males; no band or spots on sides; caudal fin red, not black-edged; 4.5 scales between lateral line and dorsal fin; 21-31 lateral line scales; 11-16 anal fin branched rays; 8/8 premaxillary teeth; 16-20 gill rakers in lower part of first branchial arch (Ref. 2880, 81279).

Description: anal fin with 3 branched and 11-16 unbranched rays; jaws equal; premaxilla with two tooth rows, each comprising 8 teeth; in larger individuals, two teeth of the anterior row become dislodged, thus forming a second row (Ref. 2880, 81279).

Colouration: ground colour silvery, back darker (greenish or brownish), belly lighter; black humeral spot; black blotch on caudal peduncle, sometimes extending partially or totally unto caudal-fin rays; colour of fins variable with hydrographic basin: rayed fins yellowish or reddish and adipose fin red (Congo, Ghana, South Africa), paired fins yellow and adipose fin black (Zambezi, Lake Rukwa), rayed fins and adipose fin vermillion red (Côte d'Ivoire and Togo except in Nipoué where species has more brownish fins)(Ref. 2880, 81279).

Ease of Identification

Meristic characteristics of Brycinus imberi

Lateral Lines 1 Interrupted: No
Scales on lateral line 21 - 31
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 4.5 - 4.5
Scale rows below lateral line 3.5 - 3.5
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 16 - 20
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

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

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 14 - 18

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal  beneath origin of D1
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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