Main Ref. | Marinho, M.M.F., D.A. Bastos and N.A. Menezes, 2013 |
Appearance refers to | |
Bones in OsteoBase |
Specialized organs | |
Different appearance | always different morphology between mature adults |
Different colors | |
Remarks | Presence of spines and hooks on fins only in males; tiny spines laterally located on unbranched dorsal-fin rays; hooks on all pelvic-fin rays and on last unbranched and first five or six branched anal-fin rays. Males have shallower body depth and longer pectoral and pelvic fins than females; and medial portion of pelvic bone of males expanded and dorsally projected (Ref. 94718). |
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 |
This species differs from all members of the genus Tyttobrycon by the possession of tricuspid premaxillary teeth, tri- or pentacuspid maxillary teeth and four broad tricuspid anterior dentary teeth (vs. all teeth conical in the jaws). It can be further diagnosed from all congeners, except T. dorsimaculatus, by having 5-7 premaxillary teeth (vs. 8-9), and from T. dorsimaculatus by having only scattered melanophores on the dorsal fin (vs. dorsal fin with a conspicuous black spot). The presence of adipose fin separates this species from T. hamatus and T. spinosus (vs. adipose fin absent) (Ref. 94718). Description: Dorsal-fin rays ii,8-9; anal-fin rays iii-iv,12-14; pectoral-fin rays i,8-10; pelvic-fin rays i,7; 3 longitudinal scale rows below lateral line at pelvic-fin origin; 28- 31longitudinal scale row, including pored scales (Ref. 94718). |
Ease of Identification |
Lateral Lines | Interrupted: No |
Scales on lateral line | |
Pored lateral line scales | 3 - 5 |
Scales in lateral series | |
Scale rows above lateral line | 4 - 4 |
Scale rows below lateral line | |
Scales around caudal peduncle | 12 - 12 |
Barbels | |
Gill clefts (sharks/rays only) | |
Gill rakers | |
on lower limb | |
on upper limb | |
total | |
Vertebrae | |
preanal | 13 - 14 |
total | 31 - 33 |
Attributes | no striking attributes |
Fins number | 1 |
Finlets No. | Dorsal |
Ventral | |
Spines total | |
Soft-rays total | 10 - 11 |
Adipose fin | present |
Attributes | forked |
Fins number | |
Spines total | |
Soft-rays total |
Pectoral | Attributes more or less normal |
Spines | |
Soft-rays 9 - 11 | |
Pelvics | Attributes more or less normal |
Position abdominal behind origin of D1 | |
Spines | |
Soft-rays 8 - 8 |