Genus: Anningasaura VINCENT & BENSON, 2012
Etymology: In honor of Mary Anning, who was the first-recognized female palaeontologist, as well as the discoverer of the first-ever complete specimen of plesiosaur in 1823 (Conybeare, 1924).

Species: lymense VINCENT & BENSON, 2012
Etymology: In reference to Lyme Regis, England, Southern United Kingdom, the locality where the type specimen was found.
= Plesiosaurus macrocephalus OWEN, 1840 (referred specimen)

Holotype: NHMUK OR49202

Locality: Lyme Regis coast, Pinhay Bay- Charmouth, (SY 3291-SY 3794), Dorset County, England, Southern United Kingdom.

Horizon:

Biostratigraphy: Caenisites obtusum zone.

Age: Hettangian-Pliensbachian Stage, Lower Lias Epoch, Early Early Jurassic.

Material: Skull and skeleton.