Morphology Data of Bryconamericus oroensis
Identification keys
Abnormalities
Main Ref. Román-Valencia, C., R.I. Ruiz-C., D.C. Taphorn and C. García-A., 2013
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance always different morphology between mature adults
Different colors
Remarks Sexually mature males lack row of spines on first to tenth branched anal-fin rays, without spines on simple rays, each ray with 5-11 spines, located on basal. Middle and posterior-most branches,11-23 large spines on all branched rays of pelvic fin, located on both branches of rays extending on to anterior-most part. Males have caudal peduncle more swollen and caudal-fin rays thicker than females. Males have lateral stripe darker and more prominent than females. Males have higher concentration of melanophores along posterior margins of scales that, strongly concentrated along the lateral band and also along infraorbital, opercular and lateral surface of the cranium (vs. lighter pigmentation pattern, with the humeral and peduncular regions pigmented, in females) (Ref. 93958).

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
Diagnosis

This species differs from all its congeners by having a dark lateral stripe overlaid with a peduncular spot and a reticulated pattern on the sides of the body (vs. peduncular spot and other body pigments not superimposed over a dark lateral stripe). Other diagnostic characters include the following: three simple dorsal–fin rays, the first only visible in cleared and stained material and articulated, along with the second simple ray, with the first dorsal pterygiophores; third simple ray longer, and articulated with second dorsal pterygiophores (vs. only two simple dorsal–fin rays, both articulated with first dorsal ptery¬giophores); and anterior frontals both separated and so the fontanel front parietal continues on the mesethmoid (vs. anterior tips of frontals united and fontanel front parietal no continued on the mesethmoids) (Ref. 93958).

Description: Anal-fin rays iii-iv, 24-28 (Ref. 93958).

Ease of Identification

Meristic characteristics of Bryconamericus oroensis

Lateral Lines Interrupted: No
Scales on lateral line 38 - 41
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 6 - 6
Scale rows below lateral line 6 - 8
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total 38 - 39

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 12 - 12
Adipose fin present

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   12 - 12
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     
Soft-rays   8 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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