Bandy, O. L. (1949). Eocene and Oligocene foraminifera from Little Stave Creek, Clarke County, Alabama. Bulletins of American Paleontology. 32 n° 131: 31-206., available online at
http://www.biodiversitylibrary.org/item/40443#page/63/ page(s): p. 118 (or 148) pl. 22 fig. 1