| Main Ref. | Britski, H.A. and J.C. Garavello, 2007 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Males with conspicuous urogenital papillae immediately posterior to anal opening, whereas females with the urogenital ducts open into the inner cloacal cavity. Adult males can be additionally distinguished by modifications on the dorsal surface of the pelvic fin: development of a characteristic skin flap along first ray (unbranched); and greater development and typical arrangement of the odontodes of median portion of branched rays, which also show an enlargement of the skin covering those odontodes. Females have no skin flap on the dorsal surface of the first ray (unbranched) and have minute or have no odontodes on the dorsal surface of branched rays (Ref. 75061). |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Diagnosed from its congeners by having reddish-brown tipped teeth. Can be differentiated also by the following combination of characters: 20-40 teeth on premaxillary and 15-38 on the dentary bones; 23-24 plates in longitudinal series; lateral line almost complete, represented by 19-22 perforated +1 or 2 non-perforated plates; dorsal surface of pectoral spine with about five longitudinal series of odontodes; abdomen in adults (about 2.30 cm SL) entirely covered with large plates, two to four in lateral series between the tip of the cleithrum and pelvic-fin base; a large dark brown lateral stripe extending from tip of snout, through inferior orbit, to end of caudal peduncle; transverse dark bars very inconspicuous or absent (Ref. 75061). Description: Dorsal fin i7; Anal fin i5; Pectoral fin i6; Pelvic fin i5 (Ref. 75061). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 23 - 24 |
| Pored lateral line scales | 19 - 22 |
| Scales in lateral series | |
| Scale rows above lateral line | |
| 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 | |
| total |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 8 - 8 |
| Adipose fin | absent |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 6 - 6 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 7 - 7 | |
| Pelvics | Attributes |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 6 - 6 |