Mooreinella biserialis Cushman & Waters, 1928

Description:

 Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification.  Van Nostrand, Reinhold Co. New York 1728 pp. Plate 142, Figs. 1-3: U. Carboniferous (Pennsylvanian) East Mountain Shale Member of Mineral Wells Formation, San Saba County, Texas, USA. 1, Side view of elongate specimen, SEM, x 70; 2, 3, side and edge views showing well-developed short triserial stage, elongate biserial stage of inflated chambers, and arched aperture, SEM, x 70 (new figures from Loeblich and Tappan, 1987). courtesy of Michael Hesemann https://foraminifera.eu