Morphology Data of Triportheus orinocensis
Identification keys
Main Ref. Malabarba, M.C.S.L., 2004
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 cycloid scales

Body deep, with depth at dorsal-fin origin 28.7-37.1% SL and depth at pectoral-fin insertion 32.2-39.3. Distinguished easily from its congeners by the extensive scaling over the caudal and anal fins. Differs from elongate-bodied Triportheus species that have 1 longitudinal scale row between the pectoral-fin insertion and the ventral keel by the presence of 2 longitudinal scale rows between the pectoral-fin insertion and the ventral keel. Differs further from deep-bodied congeners by the combination of the number of hill rakers on the lower limb of the first gill arch (24-28); the number of branched anal-fin rays (28-32); and the number of lateral-line scales (34-39) (Ref. 54769).

Description: D. ii,9; A. iii,28-32; P. i,10-13; V. i,6 (Ref. 54769).

Ease of Identification

Meristic characteristics of Triportheus orinocensis

Lateral Lines Interrupted: No
Scales on lateral line 34 - 39
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 7 - 7
Scale rows below lateral line 2 - 2
Scales around caudal peduncle 5 - 5
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 24 - 28
on upper limb


Dorsal fin(s)

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

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Position    abdominal
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Torres, Armi G.
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