Andy Anderson Farm, near Cedar Hill (Cretaceous to of the United States)

Also known as Libonectes morgani type locality

Where: Dallas County, Texas (32.6° N, 97.0° W: paleocoordinates 32.0° N, 63.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Britton Formation (Eagle Ford Group), Late/Upper Cenomanian to Late/Upper Cenomanian (99.6 - 89.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; concretionary, hematitic, gray limestone

• The specimen is in a very hard gray limestone conretion that weathers on the surface to a soft yellowish clay. Small nodules of hematite occur, superficially weathered to limonite. Small uncrushed cehalopod shells are abundant in the limestone. The matrix is crossed by veins of crystalline limestone and gypsum.

Size class: macrofossils

Primary reference: S. P. Welles. 1949. A new elasmosaur from the Eagle Ford Shale of Texas. Fondren Science Series 1:1-28 [R. Benson/R. Benson/R. Benson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 77349: authorized by Matthew Carrano, entered by Matthew Carrano on 09.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Plesiosauria - Elasmosauridae
"Elasmosaurus morgani n. sp." = Libonectes morgani
"Elasmosaurus morgani n. sp." = Libonectes morgani Welles 1949 southwest diver
SMUSMP 69120 (holotype)