Morphology Data of Polysteganus flavodorsalis
Identification keys
Abnormalities
Main Ref. Iwatsuki, Y. and P.C. Heemstra, 2015
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 compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: scale rows above lateral line 6.5 and between 5th dorsal-fin spine base and lateral line 5½; pored lateral line scales 52- 53; suborbital depth obviously less than the orbit diameter (OD), 72-75% (mean 74%) of OD; dorsal-fin rays are reddish pink with bright yellow margin, anal-fin rays pinkish; no obvious lines of blue spots on body, but usually a blue iridescence in each body scale around dorsal and lateral sides of body from some angles; yellow and red membranes only on upper and lower caudal-fin lobes, respectively (these 2 colors are strongly contrasted; somewhat deeper body, 39-43 (mean 41%) of SL; without bony bulge before and above eye; its caudal fin moderately forked (Ref. 106993).

Ease of Identification

Meristic characteristics of Polysteganus flavodorsalis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 52 - 53
Scales in lateral series
Scale rows above lateral line 6.5 - 6.5
Scale rows below lateral line 15.5 - 16.5
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 12 - 13
on upper limb 6 - 7
total 19 - 20
Vertebrae
preanal
total

Fins

Dorsal fin(s)

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

Caudal fin

Attributes

Anal fin(s)

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

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   15 - 16
Pelvics Attributes  
Position    
Spines     1
Soft-rays   5 - 5
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