Foraminifera from the Duck Creek Formation of Oklahoma and Texas

Abstract

One hundred and twenty species of Foraminifera are described from the Lower Cretaceous Duck Creek formation of southern Oklahoma and northern Texas, of which 37 are new. Twenty-eight of the previously described species are recorded from this formation for the first time. Five generic ranges are extended downward into the Lower Cretaceous. These are Ammobaculoides and Hastigerinella, which had not previously been recorded below the Upper Cretaceous, and Siphotextularia, Unicosiphonia and Stichocibicides, not previously known below the Tertiary. One new genus, Washitella, is described.