Morphology Summary - Hemigrammus serrazul
Morphology Data of Hemigrammus serrazul
Identification keys
Abnormalities
Main Ref. Ferreira, K.M., A.C. Ribeiro and F.R. Carvalho, 2026
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) elongated
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: flank uniformly colored, without spots, i.e., no humeral and caudal spots, just a tiny and narrow longitudinal stripe; premaxillary teeth in two rows: outer with three to five tricuspid teeth, inner with five tetra- pentacuspid teeth; a narrow silvery/yellowish longitudinal stripe on flank, with slightly blackish upper eye portion in in vivo specimens; pored lateral-line scales 12-15 (mode 15); branched anal-fin rays 21-25 (mode 22); and small bony hooks on the tip of lepidotrichia of the second to fourth branched pelvic-fins rays present, these absent from the anal fin (Ref. 138764).

Ease of Identification

Meristic characteristics of Hemigrammus serrazul

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 33 - 33

Fins

Dorsal fin(s)

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

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total 21 - 25

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   11 - 12
Pelvics Attributes  
Position    
Spines     
Soft-rays   7 - 7
(e.g. 9948)
(e.g. oophagy)
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