Morphology Data of Pegusa triophthalma
Identification keys
Abnormalities
Main Ref. Desoutter, M., 2003
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features flatfish
Body shape lateral other (see Diagnosis
Cross section flattened
Dorsal head profile clearly convex
Type of eyes other (see Diagnosis)
Type of mouth/snout other (see Diagnosis)
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

Diagnosis: flat and asymmetric body; eyes located on right side of head, except in reversed individuals; preopercle covered by skin and opercle entirely scaled; mouth small, more or less arched and inferior; dorsal and anal fins lacking spinous rays and separated from caudal fin; dorsal fin originating almost at anterior end of snout; pectoral fins present; lateral line straight, anteriorly prolonged into supratemporal line describing an arch above eyes; body covered with ctenoid scales (Ref. 57416).

Description: pectoral fin on blind side as well developed as that of eyed side; anterior nostril on blind side expanded into a rosette with extensively ciliate outer margin, posterior nostril close to anterior one (Ref. 57416).

Colouration: eyed side more or less dark brown, covered with more or less dark specks and with three blackish eyespots regularly spaced along lateral line; dorsal and anal fins of same colour as body; pectorals with black spot towards tips; blind side whitish (Ref. 57416).

Ease of Identification

Meristic characteristics of Pegusa triophthalma

Lateral Lines 1 Interrupted: No
Scales on lateral line
Pored lateral line scales 90 - 110
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

Fins

Dorsal fin(s)

Attributes extending over most of the back length
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 76 - 82
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 57 - 64

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   7 - 10
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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