Lorrainosaurus is an extinct genus of pliosaurid from the Middle Jurassic of Lorraine, France.[
]
Discovery and naming
The holotype (MNHNL BU159) was discovered during a temporary excavation for a roadway upgrade between the Montois-la-Montagne and Sainte-Marie-aux-Chênes communes in Lorraine, France. The remains consisted of a near-complete mandible, coracoid shoulder bone, a tooth, and fragments of the maxilla and front limb. They specifically originated from a section of the Marnes de Gravelotte, a marl deposit dated to the Bajocian stage of the Middle Jurassic around 168 mya. The specimen first came under the study of paleontologist Pascal Godefroit in 1994, who described it as a new species of Simolestes and assigned the name S. keileni.[
]
The generic identification was doubted by the PhD thesis of Noè (2001),[Noè, L. F. (2001). A taxonomic and functional study of the Callovian (Middle Jurassic) Pliosauroidea (Reptilia, Sauropterygia). Chicago.] but it was not until at least 2021 that the holotype began to be rigorously reexamined by Sven Sachs of the Bielefeld Natural History Museum.[
]
Description
Lorrainosaurus was a fairly small pliosaur. When extrapolating the length of the holotype's full-length mandible () to the proportions of the closely related Stenorhynchosaurus, which is represented by a near-complete skeleton with a mandible close to one-third of the total animal's length, a total length of for L. keileni can be estimated.[
]
See also
-
List of plesiosaur genera
-
Timeline of plesiosaur research
Notes
