| Main Ref. | Menezes, N.A., S.H. Weitzman and I. Quagio-Grassiotto, 2013 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Caudal peduncle depth, pectoral-fin length, pelvic-fin length, dorsal-fin height and the distance from dorsal-fin origin to caudal-fin base are sexually dimorphic (Ref. 94699). |
| Striking features | |
| Body shape lateral | short and / or deep |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | cycloid scales |
| Diagnosis |
This species can be distinguished from its congeners by having the following characters: urogenital papilla externally visible in both males and females (vs. absent in M. pearsoni); length of urogenital papilla of sexually active males is shorter, half length of anal-fin base (vs. about equal to length of anal fin-base in M. kontos); dorsal fin height 16.1-17.8% SL in females and juveniles (vs. 13.4-15.8% SL in M. kontos); and 5 premaxillary tooth cusps (vs. 7 in M. kontos) (Ref. 94699). Description: Dorsal-fin rays ii,7-8; anal-fin rays ii,9-12; pectoral-fin rays i,9-10; pelvic-fin rays ii,4-5; 3 scale rows from pelvic-fin origin to lateral line (Ref. 94699). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 33 - 39 |
| Pored lateral line scales | 33 - 39 |
| Scales in lateral series | |
| Scale rows above lateral line | 4 - 5 |
| Scale rows below lateral line | |
| Scales around caudal peduncle | 10 - 10 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 11 - 15 |
| on upper limb | 9 - 10 |
| total | |
| Vertebrae | |
| preanal | |
| total | 37 - 38 |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 9 - 10 |
| Adipose fin | absent |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 11 - 14 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 10 - 11 | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 6 - 7 |