Main Ref. | Crampton, W.G.R., D.H. Thorsen and J.S. Albert, 2005 |
Appearance refers to | |
Bones in OsteoBase |
Specialized organs | |
Different appearance | |
Different colors | |
Remarks |
Striking features | |
Body shape lateral | |
Cross section | |
Dorsal head profile | |
Type of eyes | |
Type of mouth/snout | |
Position of mouth | |
Type of scales | |
Diagnosis |
Distinguished from its congeners endemic to the Amazon and Orinoco Basins and the Guyana Shield in having many pectoral-fin rays 20-22; and a color pattern of oblique and undivided thin pale bands, less than one-quarter width of dark bands, with straight high-contrast margins, which extend to the dorsal midline on the anterior half of the body, and of which many are interrupted at the ventral margin of the hypaxial muscles along the anterior two-thirds of the body. Differs further from congeners endemic to the Amazon-Orinoco basins and the Guyana Shield in having the following unique combination of characters: clear (unpigmented) patch at the caudal end of the anal-fin membrane in specimens 6.0-23.5 TL; and bands never divided to form band pairs (Ref. 55508). |
Ease of Identification |
Lateral Lines | Interrupted: No |
Scales on lateral line | |
Pored lateral line scales | 108 - 132 |
Scales in lateral series | |
Scale rows above lateral line | 5 - 7 |
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 | 35 - 37 |
total |
Attributes | |
Fins number | |
Finlets No. | Dorsal |
Ventral | |
Spines total | 0 - 0 |
Soft-rays total | 0 - 0 |
Adipose fin | absent |
Attributes |
Fins number | |
Spines total | |
Soft-rays total | 210 - 250 |
Pectoral | Attributes |
Spines | |
Soft-rays 20 - 22 | |
Pelvics | Attributes |
Position | |
Spines | |
Soft-rays |