Where: Medina County, Texas (29.4° N, 99.3° W: paleocoordinates 34.9° N, 72.6° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Anacacho Formation, Early/Lower Campanian to Early/Lower Campanian (83.5 - 70.6 Ma)
• Ammonite distributions suggest that at least two time intervals are represented by the Anacacho in the type area and probably elsewhere; a lower Campanian and a middle Campanian interval. The stratigraphic position of this collection is unknown.
• group of beds-level stratigraphic resolution
Environment/lithology: perireef or subreef; lithified, shelly/skeletal limestone
Size class: macrofossils
Reposited in the USNM
Primary reference: C. W. Cooke. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254-A:1-44 [W. Kiessling/U. Merkel/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 190358: authorized by Matthew Clapham, entered by Matthew Clapham on 05.12.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Rhynchonellata | |
Cricosia filosa Conrad 1866 | |
Echinoidea | |
"Ananchytes texana n. sp." = Echinocorys texanus
"Ananchytes texana n. sp." = Echinocorys texanus Cragin 1893 sea urchin |