Morphology Data of Leptachirus triramus
Identification keys
Main Ref. Randall, J.E., 2007
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

This species is distinguished by the following characters: D 65-72; A 50-56; lateral-line scales 71-84; pelvic rays 4 or 5 (usually 4); lateral line on ocular side of head with three branches; vertebrae 36-38; dorsal pterygiophores anterior to fourth neural spine 7-11; slender body, depth 2.85-3.15 in SL; no caudal peduncle or extremely short; short head, length 4.7-5.15 in SL; eye diameter 4.8-5.5 in HL; interorbital width 9.55-10.7 in HL; longest dorsal ray 1.7-2.0 in HL; caudal fin 3.95-4.1 in SL; ocular-side pelvic fin anterior to blind-side fin; ocular-side pelvic fin joined by membrane to base of genital papilla, while fin of blind side joined to blind-side of anal papilla; pelvic fins reaching base of second anal ray, 2.3-2.6 in HL; no scales extending out on dorsal and anal rays; ocular side in alcohol light grey-brown, with many small blackish spots, and 3 longitudinal rows of blackish blotches of about twice eye diameter; dorsal and anal fins pale with a dark middle streak on rays; caudal fin with small dark spots on rays (Ref. 84817).

Ease of Identification

Meristic characteristics of Leptachirus triramus

Lateral Lines Interrupted: No
Scales on lateral line 71 - 84
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 36 - 38


Dorsal fin(s)

Fins number
Finlets No. Dorsal   
Spines total
Soft-rays total 65 - 72
Adipose fin

Caudal fin


Anal fin(s)

Fins number
Spines total
Soft-rays total 50 - 56

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Soft-rays   4 - 4
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
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