Morphology Data of Bathyraja trachura
Identification keys
Abnormalities
Main Ref. Knuckey, J.D.S. and D.A. Ebert, 2022
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 moderately sized skates (91.0 cm TL) with disc length (28.7-56.7% TL) are distinguished by the following: pectorals broadly rounded, head length short (15.0-24.1% TL), preorbital length short (9.0-13.5% TL) are also distinguished by having the following: claspers short, tips relatively rounded, with large pseudosiphon and a strong, short pseudorhipidion, not reaching the tip, V-shaped cleft, projection absent; teeth in 27-36 rows on upper jaw and in 26-36 rows on lower jaw; pectoral fin radials 81; pelvics 23; total vertebrae 109; dorsal surface is covered with rough prickles, prickles on tail are larger and more robust; thorns on dorsal surface, mature males with alar thorns, no malar thorns, middorsal thorns weak or absent (0-1); nuchal thorns small or obsolete (0-3); tail thorns moderate (21-30); interdorsal thorns are small to occasionally absent (0-1). Colouration: dorsal dark purple, brown, or grey, spiracles occasionally pale, ventral coloration a lighter grey than dorsal surface, often with white blotching on mouth, gills, cloaca, and scattered across the body (Ref. 126515).

Ease of Identification

Meristic characteristics of Bathyraja trachura

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   
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