Hyphessobrycon socolofi, Weitzman, 1977

Mirande, Juan Marcos, 2010, Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy, Neotropical Ichthyology 8 (3), pp. 385-568 : 510

Autapomorphies of Hyphessobrycon socolofi :

1. Relative size of frontal and parietal fontanels (23): (1> 0) length of frontal fontanel up to 2/3 length of parietal fontanel. Some trees: Paralleled in Hyphessobrycon elachys .

2. Number of gill rakers on first hypobranchial and ceratobranchial (195): (1> 0) 16 or more. Paralleled in nodes 177 and 183 and in Astyanax latens , A. cf. rutilus , A. pelegrini , Hoplias cf. malabaricus , Moenkhausia dichroura , Parecbasis cyclolepis , Piaractus mesopotamicus , and Stichonodon insignis .

3. Pectoral-fin bony hooks in adult males of species bearing hooks on fins (310): (0> 1) present. Paralleled in node 268 and in Astyanax cf. asuncionensis , A. lineatus , Bario steindachneri , Bryconamericus cf. iheringii , B. rubropictus , Hyphessobrycon luetkenii , and Phenacogaster tegatus .

4. Dorsal-fin bony hooks in adult males of species bearing hooks on fins (311): (0> 1) present. Paralleled in nodes 248 and 268 and in Astyanax cf. asuncionensis , A. lineatus , Bario steindachneri , Bryconamericus rubropictus , Hyphessobrycon luetkenii , Nematocharax venustus , and Probolodus heterostomus .

5. Caudal-fin bony hooks in adult males of species bearing hooks on fins (312): (0> 1) present. Paralleled in node 268 and in Acrobrycon tarijae , Astyanax cf. asuncionensis , A. lineatus , Bario steindachneri , Hyphessobrycon luetkenii , and Probolodus heterostomus .