Morphology Data of Bathyraja smirnovi
Identification keys
Abnormalities
Main Ref. Misawa, R., A.M. Orlov, S.Y. Orlova, I.I. Gordeev, H. Ishihara, T. Hamatsu, Y. Ueda, K. Fujiwara, H. Endo and Y. Kai, 2020
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
Cross section flattened
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished by the following characters: no blotches on the dorsal disc surface or a pair of white or dark blotches; dark blotch and band usually absent on the ventral disc surface; predorsal caudal vertebrae 80-87 (Ref. 123274)..

Geographical variations are present in the populations of the seas of Japan and Okhotsk: number of total tail thorns, ranging from 21-33 (average and standard deviation: 27.3±2.9) (southern Sea of Japan) vs.19-29 (26.0 ± 2.3) (northern Sea of Japan), vs. 22-27 (24.3 ± 1.5) (Sea of Okhotsk) (P < 0.05) and the frequency distribution of tail thorn numbers was bimodal in the Sea of Japan [modes: 25 and 28,29 (southern); 25,26 and 28 (northern)], but unimodal in the Sea of Okhotsk (mode: 25) (Ref. 123274).

Ease of Identification

Meristic characteristics of Bathyraja smirnovi

Lateral Lines Interrupted: No
Scales on lateral line
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

Fins

Dorsal fin(s)

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

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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