Genus: Steneosaurus GEOFFROY, 1825
Etymology:
= Leptocranius BRONN, 1837

Species: rostromajor SAINT-HILAIRE, 1825
Etymology: Latin, major, "elongated" and Latin, rostrum, "snout."
= Crocodilian snout CUVIER, 1800
= Leptocranius rostromajor BRONN, 1835-37

Lecolotype: MNHN.RJN 134c-d

Locality: Vaches Noires, Calvados, France.

Horizon: Marnes de Villers Formation.

Biostratigraphy:

Age: Callovian Stage, Dogger Epoch, Middle Jurassic-Oxfordian Stage, Early Malm Epoch, Early Late Jurassic..

Material: Partial rostrum.

Referred material:

= Steneosaurus longirostris HOLL, 1829
Etymology:
= Gavial longirostris (HOLL, 1829)

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= Gavialis becheleti GRAY, 1831
Etymology:

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Note: CUVIER's 'gavial de Honfleur a museau plus allonge'.