Morphology Data of Placidochromis communis
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
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: head length 36.6-39.4 %SL; snout length 35.4-38.2 % head length; lower jaw length 34.5-36.1 % head length; premaxillary pedicel length 28.8-31.47 % head length; outer oral teeth unicuspid; inner oral teeth present, unicuspid; cheek depth 20.4-24.3 % head length; lachrymal depth 23.2-24.5 % head length; interorbital width 17.9-21.4 % head length; lower pharyngeal teeth fine and slender; predorsal distance 39.9-43.2 %SL; body depth 35.5-38.7 %SL (Ref. 55898).

Description: dorsal body profile more strongly convex than ventral body profile; dorsal head profile convex except small specimens with straight dorsal head profile; larger specimens with slightly concave dorsal snout profile; snout pointed and angular; mouth normal; gape almost horizontal; lower jaw inclined at about 10° to horizontal; maxilla extending to vertical at anterior margin of eye; outer oral dentition unicuspid or shouldered tricuspid; inner oral dentition unicuspid; 2-3 series of scales on cheek; lower pharyngeal jaw normal; pharyngeal teeth fine and slender; gill-rakers on lower limb short and pointed; mature males with soft rays of dorsal fin prolonged, but not filamentous (Ref. 55898).

Coloration: Preserved: Females and immature males: body pale brownish yellow; 6-7 vertical bars below dorsal fin; dorsal fin with grey base, white submarginal band, and grey lappets and tips; broad grey vertical bars in soft dorsal; all other fins pale (Ref. 55898). Mature males: dark vertical bars on body; snout, chin and belly dark; dorsal fin with grey base, white submarginal band, grey lappets and black tips; broad vertical to oblique grey bands on soft dorsal; caudal fin with black edges; anal and ventral fins with black leading edge (Ref. 55898).

Ease of Identification

Meristic characteristics of Placidochromis communis

Lateral Lines Interrupted: No
Scales on lateral line 31 - 32
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 16 - 16
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 8 - 9
on upper limb 2 - 3
total 11 - 13
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 14 - 16
Soft-rays total 10 - 12
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 8 - 9

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   15 - 15
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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