Frondina permica Sellier de Civrieux & Dessauvagie, 1965

Description:

 Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification.  Van Nostrand, Reinhold Co. New York 1728 pp. Plate 432, Figs. 13-20: U. Permian, Anatolia, Turkey. 13-15, Side, apertural, and edge views of paratype, x 60; 16-18, side, apertural, and edge views of holotype, x 122; 19, 20 paratypes (from Sellier de Civrieux and Dessauvagie, 1965). courtesy of Michael Hesemann https://foraminifera.eu