Schizodon

1. Mouth subterminal; snout prominent................ S. nasutus

1’. Mouth terminal; snout non-prominent........................... 2

2. Body without dark-brown transverse bars; darkbrown oval, horizontaly elongated, blotch on the caudal peduncle ......................................................... S. altoparanae

2’. Body with dark-brown transverse bars; no dark-brown blotch on the caudal peduncle................................ S. borellii