Morphology Data of Bryconops tocantinensis
Identification keys
Abnormalities
Main Ref. Guedes, T.L.O., E.F. Oliveira and P.H.F. Lucinda, 2016
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Mature males with bony hooks on the anal and pelvic-fin rays.

Descriptive characteristics of juvenile and adult

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

Bryconops tocantinensis is distinguished from all species of Bryconops, except

B. humeralis and B. vibex by the color pattern in vivo (dorsal, adipose, and caudal fins entirely orange). It differs from B. humeralis and B. vibex by the lack of a humeral spot and by the lack of maxillary teeth (vs. a single humeral spot present and 1-3 maxillary teeth on both sides present). It can be further diagnosed from B. vibex by having 38-41 perforated lateral line scales (vs. 44-46) (Ref. 109891).

Ease of Identification

Meristic characteristics of Bryconops tocantinensis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 38 - 41
Scales in lateral series 42 - 45
Scale rows above lateral line 7 - 8
Scale rows below lateral line 3 - 4
Scales around caudal peduncle 16 - 16
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal 18 - 18
total 40 - 40

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 10 - 11
Adipose fin absent

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total 25 - 29

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   11 - 12
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     
Soft-rays   8 - 8
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