Morphology Data of Osteodiscus andriashevi
Identification keys
Main Ref. Pitruk, D.L. and V.V. Federov, 1990
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales

Abdominal disk large, its rays long, fine under thin skin over entire length; a narrow free fold of skin around the disk with unthickened bordering edge, two anterior rays attached to anterior process of pelvis; jaw teeth simple with blunt cusps, with lateral cusps in the posterior rows; pores of the seismosensory system on the head not enlarged; single suprabranchial pore; pectoral fin without notch; pleural ribs absent; epipleural ribs present; one reduced epural (Ref. 41724).

Ease of Identification

Meristic characteristics of Osteodiscus andriashevi

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 9 - 9
total 55 - 59


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 52 - 53
Adipose fin absent

Caudal fin

Attributes pointed; confluent

Anal fin(s)

Fins number
Spines total 0 - 0
Soft-rays total 46 - 49

Paired fins

Pectoral Attributes  
Soft-rays   21 - 23
Pelvics Attributes  
Soft-rays   6 - 6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Torres, Armi G.
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