| 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 duct opens into the inner cloacal cavity. Adult males can be additionally distinguished by having longer pelvic fin extending beyond anal-fin origin, by the development of a skin flap along dorsal portion of first pelvic-fin ray and by the growth of skin along dorsal surface of branched rays concealing specialized odontodes. Females have pelvic fin tip falls short of anal-fin origin, no skin flap on first pelvic-fin ray and no growth of skin and smaller odontodes on dorsal surface of the pelvic-fin 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 all congeners, except Hisonotus insperatus, by having a pair of rostral plates at tip of snout. Distinguished from Hisonotus insperatus by having more teeth on premaxillary (12-30) and dentary bones (9-26) vs. (3-14) and (5-11). Can be differentiated from other species of the genus by the following combination of characters: longitudinal series with 25-26 plates; lateral line almost complete with 23-24 perforated plus last non-perforated plates; abdomen in adults entirely covered with large plates, five to eight plates in lateral series between tip of cleithrum and base of pelvic fin; large dark brown lateral stripe extending from tip of snout to caudal blotch; dorsum with basal dark blotch near origin of dorsal-fin region and three transverse dark brown bars located at end of dorsal-fin base, middle and end of caudal peduncle; yellow line extending from anterior part of each orbit, over inferior nostrils, both converging to tip of snout (Ref. 75061). Description: Dorsal fin i,7; Anal fin i5; Pectoral fin i6; Pelvic fin i5 (Ref. 75061). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 25 - 26 |
| Pored lateral line scales | 23 - 24 |
| 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 |
| Fins number | |
| Spines total | |
| Soft-rays total | 6 - 6 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 7 - 7 | |
| Pelvics | Attributes |
| Position abdominal beneath origin of D1 | |
| Spines | |
| Soft-rays 6 - 6 |