Asteroidea, Lake Waco Dam, Del Rio fm, Waco, McLennan County (Cretaceous of the United States)

Where: McLennan County, Texas (31.6° N, 97.2° W: paleocoordinates 30.0° N, 62.3° W)

• coordinate based on political unit

• hand sample-level geographic resolution

When: Del Rio Formation (Washita Group), Early/Lower Cenomanian (99.6 - 93.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore shelf; poorly lithified claystone

Size classes: macrofossils, mesofossils

Preservation: replaced with pyrite

Collection methods: mechanical,

Primary reference: D. B. Blake and R. Reid. 1998. Some Albian (Cretaceous) asteroids (Echinodermata) from Texas and their paleobiological implications. Journal of Paleontology 72(3):512-532 [L. Villier/L. Villier]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 59883: authorized by Loic Villier, entered by Loic Villier on 19.04.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Asteroidea
 Valvatida - Goniasteridae
Crateraster sp. Spencer 1913 sea star
 Paxillosida - Astropectinidae
Betelgeusia reidi n. gen. n. sp.
Betelgeusia reidi n. gen. n. sp. Blake and Reid 1998 sea star
 Zorocallida - Terminasteridae
Alkaidia sumralli n. gen. n. sp.
Alkaidia sumralli n. gen. n. sp. Blake and Reid 1998 sea star