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Description: | Peterborough [district, Cambridgeshire], [England] [probably ex.] [Bed 10 (Hudson & Martill, 1994)], Oxford Clay [Formation, Peterborough Member, ("Gryphaea and Reptile Beds")], [*Kosmoceras jason jason* Zone],[Middle Callovian], [Jurassic (Middle)] ...post-frontals (2), vomer/parasphenoid, quadrates (2), quadrato-jugals (2xR - extra enlarged head, fits on to V975 facet), basisphenoid, basioccipital, parietals (2), alisphenoids (2), prootics (2), squamosals (2); sclerotic plates (4), teeth (9); lower jaw bones: articulars (2), prearticulars (2, L may be damaged), angulars (2), surangulars (2), coronoids (2, but distal prong of R missing), splenials (2), dentaries (2, but the very tips are missing), teeth in lower jaw (22, 2 with tips) unplaced skull fragments (36).
Formerly referred to as *Metriorhynchus sp.*.
The Adams-Tresman formula for species determination (width of post-frontals to length of skull) was applied, but the full extent of the snout was indeterminable, the minimum measurement was border-line, and the tooth count inconclusive, thus making it unclear which species this individual belongs to.
There is more than one individual constituting this specimen, but this seems to be restricted to one extra right quadrato-jugal head. No suggestion can confidently be made as to the possible source of this bone, if indeed there is another specimen within the collection that it belongs to, but it does fit well into the large facet for the head of the right quadrato-jugal in the larger specimen V975, and matches for size/age/preservational morphology. This is, however, inconclusive.
4 parts (including "supraoccipital") taken to Leicester (loan 2287 - 7/5/99 until 18/5/99 - handcarried by JJL) for identification by Mark Evans with New Walk Museum's Oxford Clay collection. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | VERTTETRREPTIL : CROCMETR : FOSSIL : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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