Rhacolepis

Rhacolepis is an extinct genus of ray-finned fish^[1] from the Cretaceous Santana Formation of Brazil.^[2] Complete fossilised hearts from this species have been recovered.^[3]

R. buccalis skull

Inside the stomach of a Notelops brama.

R. buccalis with several hundred small shrimp in stomach.

Fossil in Vienna

Rhacolepis Temporal range: Aptian ~119–113 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Rhacolepis buccalis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	†Crossognathiformes
Family:	†Pachyrhizodontidae
Genus:	†Rhacolepis Agassiz, 1841
Type species
Rhacolepis buccalis Agassiz, 1841
Species
R. buccalis Agassiz, 1841 R. latus Agassiz, 1841