Gracilineustes

Gracilineustes is an extinct genus of marine crocodyliform that lived in the oceans during the Middle to Late Jurassic. Gracilineustes was a carnivore that spent much, if not all, its life out at sea. It was a small reptile, with G. leedsi measuring 2.25 - 3.11 m long and G. acutus measuring 3.77 m long.

Discovery and species
Fossil specimens referrable to Gracilineustes are known from Middle-Late Jurassic deposits of England and France.

Valid species

 * G. leedsi: Western Europe (England) of the Middle Jurassic (Callovian); Metriorhynchus laeve is a junior synonym.
 * G. acutus: Western Europe (France) of the Late Jurassic (Kimmeridgian)