Morphology Data of Placidochromis borealis
Identification keys
Abnormalities
Main Ref. Hanssens, M., 2004
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section
Dorsal head profile clearly convex
Type of eyes more or less normal
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: head length 35.7 %SL; snout length 30.4 % head length; snout pointed; lower jaw length 37.4 % head length; outer oral dentition well developed bicuspid; gape inclined at about 20° from horizontal; premaxillary pedicel length 26.5 % head length; cheek depth 22.6 % head length; eye diameter 34.8 % head length; body depth 37.2 %SL (Ref. 55898).

Description: fairly elongate species; dorsal body profile convex; ventral body profile almost straight; snout profile straight; mouth moderate; maxilla extending to just beyond vertical at anterior margin of eye; outer oral teeth bicuspid; inner oral teeth tricuspid; 2 series of scales on cheek; upper margin of eye almost touching dorsal head profile; lower pharyngeal jaw stout; some central pharyngeal teeth enlarged and molariform; gill-rakers on lower limb short (Ref. 55898).

Coloration: Preserved: Mature male: body brownish yellow; 7-8 vertical bars below dorsal fin; snout and chin dark; dorsal fin grey with narrow black submarginal band and white lappets and tips; soft dorsal with dark grey spots; anal fin with dark grey spots on inter-radial membranes; anal and ventral fins with black leading edges (Ref. 55898).

Ease of Identification

Meristic characteristics of Placidochromis borealis

Lateral Lines Interrupted: No
Scales on lateral line 30
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 16
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 11
on upper limb 4
total 16
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 17
Soft-rays total 9
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total 3
Soft-rays total 8

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   14
Pelvics Attributes  
Position    
Spines     
Soft-rays   
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