Morphology Data of Astyanax bifasciatus
Identification keys
Main Ref. Garavello, J.C.I. and F.A.A. Sampaio, 2010
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 from its congeners from the IguaƧu basin by the combination of the following characters: infraorbital 3 deep, but not in contact with preopercle, leaving a narrow naked area between border and preopercle; premaxillary external series with 4 (rarely 5) pentacuspid teeth; non-symphysial teeth in premaxillary internal series heptacuspid; vertical humeral bar with dorsal portion much wider than ventral portion; a faint and diffuse 'post-humeral' spot; lateral line scales 36-40, usually 37 or 38; first branchial arch with 7-9, usually 8, rakers in upper branch and 10-13, usually 12, rakers in lower branch (Ref. 85756).

Ease of Identification

Meristic characteristics of Astyanax bifasciatus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 36 - 40
Scales in lateral series
Scale rows above lateral line 6 - 7
Scale rows below lateral line 4 - 6
Scales around caudal peduncle 15 - 16
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb


Dorsal fin(s)

Fins number
Finlets No. Dorsal   
Spines total
Soft-rays total 9 - 10
Adipose fin

Caudal fin


Anal fin(s)

Fins number
Spines total
Soft-rays total 19 - 24

Paired fins

Pectoral Attributes  
Soft-rays   11 - 14
Pelvics Attributes  
Spines     1
Soft-rays   7 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
Comments & Corrections
Sign our Guest Book
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17