| Réf. Princ. | Marinho, M.M.F., D.A. Bastos and N.A. Menezes, 2013 |
| Ressemble à | |
| Bones in OsteoBase |
| Organes spécialisés | |
| Apparence différente | always different morphology between mature adults |
| Couleurs différentes | |
| Remarques | 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). |
| Éléments remarquables | |
| Profil du corps | fusiform / normal |
| Section transverse | |
| Profil dorsal de la tête | |
| Type d'yeux | |
| Type de bouche/museau | |
| Position de la bouche | |
| Type of scales | |
| Diagnose |
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). |
| Facilité d'identification |
| Lignes latérales | Interrompu(e)(s): No |
| Écailles sur la ligne latérale | |
| Écailles perforées de la ligne latérale | 3 - 5 |
| Écailles en série latérale | |
| Rangées d'écailles au-dessus de la ligne latérale | 4 - 4 |
| Rangées d'écailles au-dessus de la ligne latérale | |
| Écailles autour du pédoncule caudal | 12 - 12 |
| Barbillons | |
| Fentes branchiales (requins et raies uniquement) | |
| Branchiospines | |
| sur le membre inférieur | |
| sur le membre supérieur | |
| Total | |
| Vertèbres | |
| préanal(e) | 13 - 14 |
| Total | 31 - 33 |
| Attributs | no striking attributes |
| Nombre de nageoires | 1 |
| Nombre de pinnules | Dorsal |
| Ventral | |
| Total d'épines | |
| Total de rayons mous | 10 - 11 |
| Nageoire adipeuse | present |
| Attributs | forked |
| Nombre de nageoires | |
| Total d'épines | |
| Total de rayons mous |
| Pectorale(s) | Attributs more or less normal |
| Épines | |
| Rayons mous 9 - 11 | |
| Pelvienne(s) | Attributs more or less normal |
| position abdominal behind origin of D1 | |
| Épines | |
| Rayons mous 8 - 8 |