Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 283, Figs. 9-10: L. Permian (Artinskian), Leonardian, Bone Spring Formation, Sierra Diablo, Texas, USA. Type species of Parafusulina (Skinnerella) Coogan. 9, Sagittal section, x 10; 10, axial section, x 10 (from Dunbar and Skinner, 1937).