Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 254, Figs. 6-10: U. Carboniferous (Westphalian), Big Saline Group, McCullock County, Texas, USA. 6, 7, Exterior, and sagittal section later made of same specimen, x 50; 8, axial section, x 75; 9,sagittal section, x 50; 10, tangential section, showing uncoiled chambers, x 75 (from W. L. Moore, 1964). note: Rectomillerella texasensis Liêm, 1974 = Millerella marblensis var., Moore, 1964, p. 301—305, pl. 48, fig. 1 — 14, 19—21, Lectotype (holotype) fig. 5 (Liêm, 1974 p. 25).
Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 254, Figs. 1-2: U. Carboniferous (Namurian), USA. 1, Morrowan, Kearny Formation, Kearny County, Kansas, sagittal section, x 75 (from Thompson, 1944); 2, Morrowan, Marble Falls Limestone, Marble Falls, Texas, axial section of holotype, x 100 (from Thompson, 1942). courtesy of Michael Hesemann https://foraminifera.eu