Bathonian genus first appearances

Aspidorhynchus (from Ancient Greek ἀσπίς (aspís), meaning "shield", and ῥύγχος (rhúnkos), meaning "snout") is an extinct genus of predatory ray-finned fish from the Middle Jurassic to the earliest Cretaceous. Fossils have been found in Europe, Antarctica and the Caribbean.

Pycnodus (from , 'dense' and 'tooth') is an extinct genus of ray-finned fish from the Eocene period. It is a wastebasket taxon, although many fossils from the Jurassic or Cretaceous are assigned to this genus, only the Eocene species, P. apodus is valid. As its name suggests, it is the type genus of Pycnodontiformes. thumb|left|Proscinetes bernardi, one example of pycnodont that was once assigned as Pycnodus The known whole fossils of Pycnodus are up to long, and have a superficial resemblance to angelfish or butterflyfish. The animals, as typical of all other pycnodontids, had many knob-like

Belonostomus (from , 'dart' and 'mouth') is a genus of prehistoric ray-finned fish that was described by Louis Agassiz in 1844. It is a member of the order Aspidorhynchiformes, a group of fish known for their distinctive elongated rostrums.