Morphology Data of Brachysomophis umbonis
Identification keys
Main Ref. McCosker, J.E. and J.E. Randall, 2001
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 circular
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Stout with tail 50-51% and head 15.5% of TL; dorsal-fin origin well behind pectoral tips; pectoral fins minute, slightly broader than long; snout short, about 3.2-4.0 in jaw; center of eye in anterior third of upper jaw; cirri of maxillary labia minute, those of lower jaw few, short and stout; interorbital space and top of head flat, dorsal head profile incised and medially constricted behind eyes; a lateral-projecting rounded protuberance about equal to orbit situated behind and beneath orbit; head pores distinct; teeth conical; preserved specimens yellowish, pale ventrally in head and trunk region, overlain behind nape with dense, fine brown speckling and an orange U-shaped band from gill opening to midhead and meeting across dorsal surface; (Ref. 42180).

Ease of Identification

Meristic characteristics of Brachysomophis umbonis

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 51 - 51
total 103 - 104


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total
Adipose fin absent

Caudal fin

Attributes pointed

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  other (see remarks)
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Comments & Corrections
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