| Main Ref. | Costa, W.J.E.M., R.E. Reis and E.R. Behr, 2004 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | none |
| Body shape lateral | |
| Cross section | |
| Dorsal head profile | clearly concave |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | cycloid scales |
| Diagnosis |
Easily distinguished from all congeners by having a unique color pattern of male, consisting of dark gray bars on flank, the three anteriormost bars distinctively darker and narrower than posterior ones. Differs from A. carvalhoi by having more anal-fin rays in male (23-26 vs. 21-22), longer anal-fin base length (38.1-40.9% SL vs. 31.4-35.1% SL) and more caudal-fin rays (28-29 vs. 25-26). Urogenital papilla of male not attached to anal fin, pelvic fins not united medially, 22-24 dorsal-fin rays in male and 16-18 in female, 18-19 anal-fin rays in female and 28-30 scales in the longitudinal series (Ref. 54764). |
| Ease of Identification |
| 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 | 20 - 20 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | 12 - 12 |
| Vertebrae | |
| preanal | |
| total | 27 - 28 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | |
| Adipose fin |
| Attributes | more or less truncate |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 12 - 12 | |
| Pelvics | Attributes |
| Position abdominal | |
| Spines | |
| Soft-rays 5 - 5 |