| Main Ref. | Menezes, N.A., 2006 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | fusiform / normal |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Both Acestrocephalus nigrifasciatus and Acestrocephalus sardina have the same color pattern and eye size, distinct from all their congeners. In addition, Acestrocephalus nigrifasciatus has more scale rows above (13-14 vs. 10-12) and below (12-13 vs. 10-12) lateral line. Differs from Acestrocephalus sardina by having longer and narrower muscular hiatus of the pseudotympanum than that of Acestrocephalus sardina; and the fibers of the obliquus inferioris muscle are not visible as in the latter species (Ref. 75890). Description: Dorsal fin ii,9; Anal fin iv,27-31; Pectoral fin i+14-15; Pelvic fin i+7 (Ref. 75890). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | 70 - 75 |
| Scales in lateral series | |
| Scale rows above lateral line | 13 - 14 |
| Scale rows below lateral line | 12 - 13 |
| Scales around caudal peduncle | 23 - 24 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | 7 - 8 |
| Vertebrae | |
| preanal | |
| total | 37 - 38 |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 11 - 11 |
| Adipose fin | present |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 31 - 35 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 15 - 16 | |
| Pelvics | Attributes |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 8 - 8 |