Morphology Summary - Xenurolebias tupinikin
Morphology Data of Xenurolebias tupinikin
Identification keys
Abnormalities
Main Ref. Gomes, B.P., L.M. Sarmento-Soares, R.F. Martins-Pinheiro and G.R. Leite, 2025
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral  (shape guide) fusiform / normal
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: adult males presenting in life a dark blotch overlapping the median portion of the last stripe on the caudal peduncle; dorsal and anal fin borders with a black outline; body depth of 25.9-27.9 in SL; caudal fin in males with 5-6 bars; male head depth 64.5-76.9% of HL; and absence of yellow spots on the distal half of the dorsal fin in males (Ref 138058).

Ease of Identification

Meristic characteristics of Xenurolebias tupinikin

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
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 12 - 17
Adipose fin absent

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 21 - 23

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   13 - 13
Pelvics Attributes  
Position    
Spines     
Soft-rays   6 - 6
(e.g. 9948)
(e.g. oophagy)
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