Autapomorphy of Thayeria boehlkei:

1. Length of laterosensory canal of dentary (79): (0> 1) reduced or absent. Paralleled in node 279 and in Aphyocharax nattereri, Bryconamericus rubropictus, Hyphessobrycon elachys, H. luetkenii, and Nantis cf. indefessus .