Roeboexodon geryi

Mirande, Juan Marcos, 2010, Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy, Neotropical Ichthyology 8 (3), pp. 385-568 : 491

Autapomorphies of Roeboexodon geryi :

1. Lateral opening between ventral diverging lamellae of mesethmoid and anterior process of lateral ethmoid (15): (0> 1) small, ovate and partially occluded by diverging lamellae of mesethmoid and anterior process of lateral ethmoid. Paralleled in Markiana nigripinnis and Roeboides descalvadensis .

2. Ventral projection of mesethmoid spine, forming a keel between premaxillae (26): (0> 1) present. Paralleled in node 253.

3. Bony lamellae bordering sensory canal of nasal (34): (0> 1) wider at some point than tubular region. Paralleled in nodes 174 and 181 and in Galeocharax humeralis and Leporinus striatus .

4. Ventral extent of third infraorbital (64): (1> 0) reaching horizontal arm of preopercle. Reversal of synapomorphy 3 of node 180. Paralleled in the Heterocharacinae and Iguanodectinae , in nodes 184, 198, 225, and 302, and in Agoniates anchovia , Brycon pesu , Hasemania nana , Markiana nigripinnis , Moenkhausia sanctaefilomenae , Pseudochalceus kyburzi , and Stichonodon insignis . Some trees: Reversed in node 292.

5. Development of transverse process of neural arch of third vertebra (219): (0> 1) well developed and extending beyond anterior margin of tripus.Paralleled in node 302, and in Agoniates anchovia , Cyanocharax alburnus , Deuterodon langei , Engraulisoma taeniatum , Hemiodus cf. thayeria , and Thayeria obliqua. Some trees: Paralleled in Microschemobrycon casiquiare and Parecbasis cyclolepis .

6. Posterior margin of cleithrum (234): (0> 1) with concavity ventral to first postcleithrum. Reversal of synapomorphy 4 of node 204. Paralleled in nodes 196 and 289 and in Probolodus heterostomus .