Morphology Data of Hemibrycon surinamensis
Identification keys
Abnormalities
Main Ref. Bertaco, V.A. and L.R. Malabarba, 2010
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Males are easily recognized by the presence of bony hooks on the dorsal-, anal-, pelvic-, and pectoral-fin rays; slightly differ in pectoral- and pelvic-fin lengths and body depth compared to females; mature males with gill gland on first gill arch, covering the first branchial filaments (Ref. 85819).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales cycloid scales
Diagnosis

This species is distinguished from its congeners, except H. divisorensis, by the presence of a wide black asymmetrical spot covering base of caudal-fin rays and extending along entire length of caudal-fin rays 9 to 12-13. It differs from H. divisorensis by the absence of a black band in the lower half of the caudal peduncle from the region above the last anal-fin rays to the caudal-fin base, and by the smaller number of scales along anal-fin base scale sheath (15-16 vs. 17-22) (Ref. 85819).

Ease of Identification

Meristic characteristics of Hemibrycon surinamensis

Lateral Lines Interrupted: No
Scales on lateral line 39 - 41
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 6 - 7
Scale rows below lateral line
Scales around caudal peduncle 14 - 14
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 11 - 12
on upper limb 7 - 9
total
Vertebrae
preanal 16 - 17
total 38 - 39

Fins

Dorsal fin(s)

Attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 8 - 8
Adipose fin

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total 26 - 27

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   10 - 12
Pelvics Attributes  
Position    
Spines     
Soft-rays   7 - 8
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