DMNH 11843, Grayson Marl (Cretaceous of the United States)

Also known as Platypterygius specimen

Where: Tarrant County, Texas (32.8° N, 97.3° W: paleocoordinates 31.2° N, 62.0° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Grayson Marl Formation, Early/Lower Cenomanian (99.6 - 93.5 Ma)

• Comanchean series

• bed-level stratigraphic resolution

Environment/lithology: coastal; gray claystone and siltstone

• normal inner to middle neritic depositional system
• calcareous, gray, blocky claystone interbedded with thin-bedded siltstone

Size class: macrofossils

Collected by L. and M. Duchouquette and K. Bridges

Primary reference: T. L. Adams and A. R. Fiorillo. 2011. Platypterygius Huene, 1922 (Ichthyosauria, Ophthalmosauridae) from the Late Cretaceous of Texas, USA. Palaeontologia Electronica 14(3):19A [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 120507: authorized by Philip Mannion, entered by Philip Mannion on 15.11.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Ichthyosauria - Ophthalmosauridae
Platypterygius sp.
Platypterygius sp. von Huene 1922 ichthyosaur
DMNH 11843 [Dallas Museum] - disarticulated cranial and post-cranial elements (left postfrontal, left parietal, partial frontal, left quadrate, left angular, right surangular, several teeth, 40 presacral and caudal vertebrae including the atlas-axis complex, partial ribs, right coracoid, a right humerus, which is badly crushed, and an articulated, partial left forelimb)