Endothyra
Endothyra, extinct genus of Foraminifera, protozoans with a readily preservable shell; found as fossils in Devonian to Triassic marine rocks (between 416 million and about 200 million years old). Endothyra, characterized by a tightly coiled shell, is sometimes found in very large numbers; it is especially abundant in some rocks of the Mississippian Subperiod (359 million to 318 million years ago).
This article was most recently revised and updated by John P. Rafferty.
Citation Information
Article Title:
Endothyra
Website Name:
Encyclopaedia Britannica
Publisher:
Encyclopaedia Britannica, Inc.
Date Published:
17 March 2009
Access Date:
November 14, 2026