Llano River about 10 miles SW of Mason (Ordovician of the United States)

Where: Mason County, Texas (30.6° N, 99.3° W: paleocoordinates 19.7° S, 90.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ellenburger Formation, Gasconadian (485.4 - 477.7 Ma)

Environment/lithology: limestone

Size classes: macrofossils, mesofossils

Preservation: recrystallized, original aragonite

Primary reference: E. O. Ulrich, A. F. Foerste, and A.K. Miller. 1943. Ozarkian and Canadian cephalopods. Part II, Brevicones. Geological Society of America Special Papers 49:1-240 [P. Wagner/P. Wagner/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 189303: authorized by Björn Kröger, entered by Björn Kröger on 10.10.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ellesmerocerida - Ellesmeroceratidae
Burenoceras dilatatum Ulrich et al. 1943
Burenoceras peramplum Ulrich et al. 1943