Morphology Data of Arctozenus risso
Identification keys
Abnormalities
Main Ref. Ambrose, D.A., 1996
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral elongated
Cross section
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout funnel-like
Position of mouth terminal
Type of scales cycloid scales
Diagnosis

Bright silvery in color (Ref. 6885). Branchiostegal rays: 8 (Ref. 35950).

Ease of Identification

Meristic characteristics of Arctozenus risso

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 18 - 36
on upper limb 3 - 9
total
Vertebrae
preanal
total 72 - 86

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 8 - 13
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 28 - 34

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   10 - 13
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   8 - 12
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