Morphology Data of Onuxodon parvibrachium
Identification keys
Main Ref. Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins, 1999
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 eel-like
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Eel-like, shallow to moderate body depth; adults small, less than 100 mm, trunk compressed; 1 to several large symphyseal fangs on premaxilla and dentary; anterior swim bladder modified into 'rockerbone'; predorsal bone present; pectoral fin rays supported by numerous small distal radials (Ref. 34024). Pectoral fins short; eyes small; lateralis papillae not visible on head or anterior lateral line (Ref. 34024).

Description: Characterized by translucent pinkish color; short pectoral fin, 3.0-6.0 in head length; body depth about 6.0-8.0 in TL; head length about 6.0-7.0 in TL; front of jaws of adult with pair of prominent canine teeth separated by gap from narrow band of small teeth posteriorly; numerous conical teeth in vomer and palatines (Ref. 90102).

Ease of Identification

Meristic characteristics of Onuxodon parvibrachium

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
preanal 16 - 18


Dorsal fin(s)

Fins number
Finlets No. Dorsal   
Spines total
Soft-rays total 44 - 47
Adipose fin

Caudal fin


Anal fin(s)

Fins number
Spines total
Soft-rays total 44 - 51

Paired fins

Pectoral Attributes  
Soft-rays   14 - 16
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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