North Central Texas, Dallas-Fort Worth area
Lower Eagle Ford Group, lower Britton FM, Turner
American South USA
Geological Time: Cretaceous Upper Cretaceous Cenomanian
Britton Formation
The identification is based upon:
Nederbragt, Alexandra J., 1991: Late Cretaceous biostratigraphy and development of Heterohelicidae (planktic foraminifera)
micropaleontology 37 44 pp. Plate 3, Fig.