| Main Ref. | Arcila, D., R.P. Vari and N.A. Menezes, 2013 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Mature males have hooks on anal-, pelvic-, and caudal-fin rays (vs. absent in mature females). |
| Striking features | |
| Body shape lateral (shape guide) | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | terminal |
| Type of scales | cycloid scales |
| Diagnosis |
Acrobrycon starnesi is distinguished from A. ipanquianus by having the following characters: 61-66 perforated lateral-line scales (vs. 51 to 60); 22-26 horizontal scales rows around the caudal peduncle (vs. 19-21); body depth at the dorsal-fin origin 25.8-31.0% of SL (vs. 49.0-51.2%SL); horizontal diameter of the eye 30.4-36.5% HL (vs. 20.2-29.8% HL); and interorbital width 24.6-28.1% of HL (vs. 29.1-40.2% HL). It differs from A. ortii by having 22-26 branched anal-fin rays (vs. 19-21), 61-66 perforated lateral-line scales (vs. 53-58), 22-26 horizontal scales rows around the caudal peduncle (vs. 19-20), body depth at the dorsal-fin origin relative to the least interobital width 70-80% (vs. 90-120%), horizontal eye diameter relative to the least interorbital width 70-80% (vs. 90-110%), and body depth at dorsal-fin origin relative to the anal fin base length 100-120% (vs. 70-90%) (Ref. 94771). Description: Anal-fin rays iv-v,22-26; pectoral-fin rays ii-iii,9-11 (Ref. 94771). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 61 - 66 |
| Pored lateral line scales | 61 - 66 |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | 22 - 26 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 10 - 10 |
| Adipose fin | present |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 8 - 8 |