ABSTRACT
An acid prepared specimen of Araripelepidotes temnurus (Agassiz, 1841) (Actinopterygii, Semionotiformes) shows the maxilla, dentary, and antorbital. These bones, which were previously only poorly known in this fossil actinopterygian, are described in detail. From the development of a mobile maxilla and the presence of an interoperculum, it is concluded that A. temnurus was a suction feeder. By analogy to the Recent Cyprinus, the diet of A. temnurus probably consisted mainly of small invertebrates.