Morphology Data of Ptychochromis onilahy
Identification keys
Abnormalities
Main Ref. Stiassny, M.L.J. and J.S. Sparks, 2006
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 short and / or deep
Cross section
Dorsal head profile
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales
Diagnosis

It is distinguished from all congeners by the presence of a lachrymal plate that extends ventrally to cover a portion of the upper lip (Ref. 57663). Body deep and laterally compressed (Ref. 57663). Two inner rows of teeth in both upper and lower jaws (Ref. 57663). It has cycloid scales above the upper lateral line on the flanks (Ref. 57663). In life, adults are uniformly gray brown, paler ventrally and lacking any obvious body markings (Ref. 57663). In preservative, the ground coloration is brownish to golden-brown, lighter ventrally, and all fins are brownish (Ref. 57663).

Ease of Identification

Meristic characteristics of Ptychochromis onilahy

Lateral Lines Interrupted: No
Scales on lateral line 33 - 34
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total 26 - 27

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total 13 - 13
Soft-rays total 12 - 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  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     
Soft-rays   
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