Morphology Data of Placidochromis obscurus
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes more or less normal
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: head length 32.3-34.5 %SL; snout length 28.5-29.5 % head length; snout blunt; lower jaw length 36.3-38.0 % head length; premaxillary pedicel length 22.5-26.3 % head length; lachrymal 16.9-20.0 % head length; 18-21 gill-rakers on lower limb of first arch; predorsal distance 35.4-36.5 %SL; body depth 35.5-37.4 %SL (Ref. 55898).

Description: ventral and dorsal body profiles convex; head profile slightly convex; snout short and blunt; gape inclined at about 15° to horizontal; maxilla extending beyond vertical of anterior of eye; outer oral teeth small, bicuspid and close-set; inner oral teeth tricuspid; 2 series of scales on cheek; upper margin of eye touching dorsal head profile; lower pharyngeal normal; all pharyngeal teeth fine and slender; gill-rakers on lower limb long and slender; in mature males soft dorsal and anal prolonged and filamentous (Ref. 55898).

Coloration: Preserved: Females and immature males: body pale beige; 7 faint vertical bars below dorsal fin; bars distinct only on upper part of body; all fins pale; dorsal fin with very faint grey spots and faint grey bands on soft portion; dorsal fin tips darker (Ref. 55898). Mature males: dark vertical bars on body; snout, chin and belly dark; dorsal fin dark with dark tips; caudal and anal fins dark; ventral fin with dark leading edge (Ref. 55898).

Ease of Identification

Meristic characteristics of Placidochromis obscurus

Lateral Lines Interrupted: No
Scales on lateral line 32 - 33
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 18 - 21
on upper limb 5 - 6
total 25 - 28
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 15 - 15
Soft-rays total 10 - 11
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

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

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   13 - 14
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Comments & Corrections
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