Belonostomus

Belonostomus (meaning "big long mouth") or Diphyodus (meaning "double tooth") is a genus of prehistoric fish that was described by Louis Agassiz in 1844. Fossils range from 99.6mya (species unknown) to 65.5mya (B. longirostris).

Belonostomus species include:
 * Belonostomus acutus
 * Belonostomus carinatus
 * Belonostomus crassirostris
 * Belonostomus indicus
 * Belonostomus longirostris
 * Belonostomus münsteri
 * Belonostomus tenuirostris