This information is ©
The Hunterian Museum and Art Gallery, University of Glasgow 2017
*Metriorhynchus superciliosus* skull
upper skull (1 main part): premaxillaries (2), maxillaries (2, post of L damaged), palatines (L+2/3R), nasals (2), jugal (L p-f junction only), prefrontals (2),..
Peterborough [district, Cambridgeshire], [England]
Oxford Clay [Formation, Peterborough Member, ("Gryphaea and Reptile Beds")], [*Kosmoceras jason jason* Zone],[Middle Callovian], [Jurassic (Middle)]
ADAMS-TRESMAN, Susan M. 1987 p.184, Table 1.
...frontals (2), postfrontals (2), vomer/parasphenoid (3 frags.), quadrate (R), supraoccipital, parietals (2), exoccipitals (2), squamosals (2), sclerotic plate fragment (1), upper jaw teeth (15/17), sockets for around 23; lower skull: articulars (2), prearticulars (2), angulars (2), surangulars (2), coronoid (R, mid-ramus missing), splenials (2, tip of R damaged), dentaries (2, tip of R damaged), lower jaw teeth (12/4), sockets for up to 20; unplaced teeth (30 - 8 of them with tips - +5 frags); shoulder girdle: coracoids (2, damaged); hip girdle: ischium (R - slight damage), femora (2 - may not be a pair, as one shorter, although this could simply be growth variation), tibia (R), fibula (R), 6 unidentified limb girdle frags (possible scapula, although it doesn't appear to fit with the coracoid).; post-cranial: atlas/axis (1), rib of atlas (R). PLUS 2 coprolites.
Identification as *Metriorhynchus superciliosus* on the basis of tooth number (20 or more) in upper jaw, and that the nasals and pre-maxillaries are separated from contact by a reasonable distance, and the ratio of the post-frontal/cranial length.
VERTTETRREPTIL : CROCMETR : FOSSIL :