Leptorrhamphus

Leptorrhamphus is an extinct genus of gavialoid crocodilian that lived during the Middle to Late Miocene in what is now Argentina. Fossils of the crocodile have been found in the formation then named Entrerriana Formation, in modern literature referred to as the Ituzaingó Formation.[1] The type species is L. entrerrianus, named after the formation in 1890.[2] It is now thought to be a nomen dubium.

Leptorrhamphus Temporal range: Mid-Late Miocene ~11.6–7.2 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Crocodilia
Superfamily:	Gavialoidea
Genus:	Leptorrhamphus Ambrosetti, 1890
Species
L. entrerrianus Ambrosetti, 1890 (type)

References

1. Barrancas del Rio Parana at Fossilworks.org
2. Camp, C. L., Taylor, D. N. and Welles, S. P., eds. (1942) Bibliography of Fossil Vertebrates 1934-1938. Geological Society of America Special Papers, Number 42.