Morphology Data of Polydactylus bifurcus
Identification keys
Abnormalities
Main Ref. Motomura, H., S. Kimura and Y. Iwatsuki, 2001
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 elongated
Cross section compressed
Dorsal head profile more or less straight
Type of eyes eyes with fixed fatty (adipose) tissue/eyelids
Type of mouth/snout more or less normal
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

Body with 8 faint stripes along longitudinal scale rows above lateral line. Pectoral filaments 5. Second spine of dorsal fin very strong, 2.5 times width of 3rd spine. Lateral line bifurcated on caudal fin base, extending to posterior margins of upper and lower caudal fin lobes (Ref. 40970).

Ease of Identification

Meristic characteristics of Polydactylus bifurcus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 69 - 69
Scales in lateral series
Scale rows above lateral line 9 - 9
Scale rows below lateral line 12 - 12
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 30 - 30
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 9 - 9
Soft-rays total 13 - 13
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 11 - 11

Paired fins

Pectoral Attributes  rays very elongated
Spines     
Soft-rays   15 - 15
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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