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Neorhipidionina williamsoni (Henson, 1948)
Description Hottinger, L. (2007). Revision of the foraminiferal genus Globoreticulina Rahaghi, 1978, and of its associated fauna of larger foraminifera from the late Middle Eocene of Iran. Carnets de géologie (Notebooks on geology). (Articles)., available online at http://paleopolis.rediris.es/cg/07/A06/page(s): p. 9 (pdf), Pl. 5, figs. 5, 8 both left; Pl. 6, figs. 1-10; Pl. 7, fig. 5 left; Pl. 8, fig. 4 top center; Pl. 9, fig. 3 bottom; Pl. 10, fig. 5 bottom center.
Plate 6, figs. 1-10. Neorhipidionina spiralis n. gen. n. sp. 1: oblique, almost centered section showing the semiinvolute early spiral stage. Note the umbilical depression. 2: oblique section inclined at about 20° with respect to the coiling axis. At bottom left an oblique section of Penarchaias glynnjonesi (Henson, 1950). 3: section parallel to and near coiling axis. Note the disposition of the foramina on the septal face. At the bottom left a section almost perpendicular to the axis of the adult shell of Haymanella huberi (Henson, 1950) showing the stellar foramen and irregular radial chamber partitions. 4: At bottom left an axial section of the holotype of this new species, and at the top right a transverse section parallel to the axis of coiling. In addition at the upper left a transverse section of Archaias operculiniformis Henson, 1950, parallel to the axis of coiling. 5: oblique, almost centered section. At the top, the only section of Neorhipidionina williamsoni (Henson, 1948) found in Rahaghi's material. The species can be recognized by its medium-sized megalosphere, significantly larger than the one in N. spiralis and smaller than the one in N. macfadyeni (Henson, 1948). 6: section parallel to the axis of coiling. 7: oblique section inclined at about 45° to the axis of coiling. Note the umbilical depression on the left side of the section. 8-9: horizontal sections of the flaring adult parts of the shell showing the radial alignement of the septula in successive semiannular chambers. 10: oblique section of the flaring adult part of shell showing the radial pattern of the endoskeleton. At the bottom an oblique section of Penarchaias glynnjonesi (Henson, 1950). JPG file - 416.58 kB - 1 000 x 1 341 pixels added on 2025-07-0118 viewsForaminifera taxa Neorhipidionina williamsoni (Henson, 1948) †checked Le Coze, François 2025-07-01
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