Picrocleidus is an extinct genus of plesiosaur from the Middle Jurassic Oxford Clay Formation (Callovian stage) of the United Kingdom.
Picrocleidus is an extinct genus of plesiosaur from the Middle Jurassic Oxford Clay Formation (Callovian stage) of the United Kingdom.
== Discovery and naming == thumb|left|Life restoration The holotype was discovered in the Oxford Clay Formation in Peterborough, England and acquired by Alfred Nicholson Leeds. It was initially assigned to Muraenosaurus as M. beloclis by Seeley in 1892. The specific name means "arrow clavicle", referring to the triangular interclavicula. M. beloclis was moved to its own genus Picrocleidus by Charles William Andrews in 1910. The generic name is derived from Greek pikros, "sharp", en kleis, "key", again referring to the clavicles.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).