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 specimen was picked and photographed by Michael Hesemann
with assistance of Dr. Georg Rosenfeldt, the raw material is provided by
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.
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