Micralestes stormsi, Boulenger, 1902

Autapomorphies of Micralestes stormsi View in CoL :

1. Ventral projection of lagenar capsule (3): (0> 1) extending ventrally to articulation between basioccipital and parasphenoid. Paralleled in the Serrasalmidae , in nodes 170, 205, and 302, and in Cyphocharax spilotus .

2. Posterior extent of third infraorbital (65): (0> 1) relatively reduced, angle of preopercle covered partially by fourth infraorbital. Paralleled in Hemiodus cf. thayeria , Piabucus melanostomus , and Pyrrhulina australis .

3. Supraorbital (70): (0> 1) absent. Paralleled in nodes 170, 185, and 205.

4. Laterosensory canal of sixth infraorbital (76): (1> 0) not branched. Paralleled in the Iguanodectinae , in node 203, and in Charax stenopterus , Cyphocharax stellatus , and Phenacogaster tegatus .

5. Position of opening on neurocranium communicating with laterosensory canal of sixth infraorbital (77): (0> 1) in frontal. Paralleled in nodes 193 and 249 and in Attonitus ephimeros .

6. Ventral margin of horizontal process of anguloarticular (109): (0> 1) perpendicular to laterosensory canal of dentary from medial view. Paralleled in node 199 and in Bario steindachneri , and Bramocharax bransfordii .

7. Cusps of teeth on outer premaxillary row (125): (0> 1) five or more cusps. Paralleled in nodes 265 and 294 and in Brycon orbignyanus , Bryconops melanurus , Gymnocharacinus bergii , and Nematocharax venustus . Some trees: Paralleled in Bryconamericus agna .

8. Posterior extent of ventral process of quadrate (151): (0> 1) falling short of posterior margin of symplectic. Paralleled in the Hyphessobrycon luetkenii clade and Iguanodectinae , in nodes 284, 289, and 298, and in Astyanax mexicanus , A. cf. rutilus , Aulixidens eugeniae , Cyphocharax spilotus , Diapoma speculiferum , Hemiodus cf. thayeria , Metynnis maculatus , Moenkhausia sanctaefilomenae , Nematocharax venustus , Probolodus heterostomus , Psellogrammus kennedyi , and Pseudocorynopoma doriae . Some trees: Paralleled in node 302.

9. Ventral margin of anterior ceratohyal (179): (0> 1) with notches for articulation of branchiostegal rays. Paralleled in nodes 167 and 189 and in Brycon orbignyanus and Salminus brasiliensis .

10. Total number of transitional vertebrae (228): (0> 1) three or fewer. Paralleled in node 205 and in Acestrorhynchus pantaneiro , Characidium rachovii , Cyphocharax spilotus , and Triportheus pantanensis .

11. Posterior margin of cleithrum (234): (0> 1) with concavity ventral to first postcleithrum. Paralleled in node 189.

12. Form of third postcleithrum (250): (1> 0) slender, without associated lamella.

13. Supraneural anterior to neural spine of fourth vertebra (279): (1> 0) absent or small. Reversal of synapomorphy 7 of node 180. Paralleled in the Iguanodectinae and in node 204.

14. Bony lamellae associated with supraneurals (282): (0> 1) wider than primary axis of supraneurals. Paralleled in the Serrasalmidae .