Psammosphaera irregularis ( Grzybowski, 1896 )

Benedetti, A, 2017, Eocene / Oligocene deep-water agglutinated foraminifers (DWAF) assemblages from the Madonie Mountains (Sicily, Southern Italy), Palaeontologia Electronica 20 (1), pp. 1-66 : 21

Psammosphaera irregularis ( Grzybowski, 1896)

Figure 12.14-15

1896 Keramosphaera irregularis ; Grzybowski, p. 273, pl. 8, fig. 12, no fig. 13.

1966 Psammosphaera levigata White ; Geroch, p. 436, pl. 7, figs. 18-20.

cf. 1981 Psammosphaera sp. var. B; Gradstein and Berggren, p. 241, pl. I, fig. 16.

1995 Psammosphaera irregularis (Grzybowski) ; Bubík, p. 84, pl. 1, figs. 15, 16.

Material. 27 specimens from 12 samples.

Description. Test small to medium in size, single chamber, lenticular, circular in outline with raised peripheral margin. Wall thick composed of medium to coarse quartz grains, aperture not clearly visible. In some specimens a small aperture appears in between the grains.

Distribution. Known in flysh-type deposits from the Late Cretaceous to Eocene ( Kaminski and Gradstein, 2005).

Figures

FIGURE 12. Scanning electron micrographs of Astrorhizida (1-13) and Saccamminidae (14-15) foraminifers from the Caltavuturo Formation cropping out at Portella Colla. 1-2, Rhabdammina discreta Brady, 1884, PCs0 (1) and PC060618 (2). 3, Rhabdammina eocenica Cushman and Hanna, 1927, PC060601. 4-5, Psammosiphonella cylindrica (Glaessner, 1937), PC11 (4) and PCs0 (5). 6-7, Psammosiphonella linearis (Brady, 1879), PC060618 (6) and PC11 (7). 8, Bathysiphon sp., MM12. 9, Nothia excelsa (Grzybowski, 1898), PC060603. 10, Nothia robusta (Grzybowski, 1898) with Ammolagena clavata (Jones and Parker, 1860), PC060621. 11, Nothia cf. latissima (Grzybowski, 1898), PC060624. 12-13, Rhizammina indivisa Brady, 1884, PC060621. 14-15, Psammosphaera irregularis (Grzybowski, 1896), PC13 (14) and PC22 (15). 16, Placentammna placenta (Grzybowski, 1898), PCs0. 17, Saccammina grzybowskii (Schubert, 1902), PC060621. Scale bar equals 0.5 mm.

FIGURE 13. Scanning electron micrographs of Psammosphaeridae (1-4) and Ammodiscidae (5-27) from the Caltavuturo Formation cropping out at Portella Colla. 1, Psammosphaera cf. laevigata White, 1928, PCs0. 2, Psammosphaera sp. 1, PC13. 3, Psammosphaera sp. 2, PC060615. 4, Psammosphaera sp. 3, PC060625. 5, Ammodiscus cretaceus (Reuss, 1845), PC22. 6, Hyperammina sp., PC060625. 7-8, Ammodiscus incertus (d’Orbigny, 1839), PC060603 (7) and PC13 (8). 9-11, Ammodiscus tenuisimus (Gümbel, 1862), PC22 (9), PC060615 (10) and PC060615 (11). 12-13, Ammodiscus latus Grzybowski, 1898, PC11 (12) and PC11 (13). 14, Ammodiscus peruvianus Berry, 1928, PC060617. 15-16, Ammodiscus cf. latus Grzybowski, 1898, PC11. 17, Ammodiscus sp. 1, PC11. 18, Ammodiscus sp. 2, PC15. 19, Ammodiscus sp. 3, PC060603. 20, Annectina biedai Gradstein and Kaminski, 1997, PC060618. 21, Annectina cf. grzybowski (Jurkiewicz, 1960), PC060617. 22, Glomospira sp. 2, PC15. 23, Glomospira sp. 1, PC11. 24, Glomospira sp. 3, PC13. 25-26. Glomospira serpens (Grzybowski, 1898), PC060617 (25) and PC060618 (26). 27, Glomospira irregularis (Grzybowski, 1898), PC060618. Scale bar equals 0.5 mm.

FIGURE 14. Scanning electron micrographs of Hormosinelloidea from the Caltavuturo Formation cropping out at Portella Colla. 1, Ammolagena clavata (Jones and Parker, 1860) on a specimen of Psammosiphonella cylindrica (Glaessner, 1937), PCs0. 2, Ammolagena clavata (Jones and Parker, 1860), PC060607. 3-7, Caudammina gutta Benedetti and Pignatti, 2009, PC18. 8, Subreophax cf. guttifer (Brady, 1881), PC15. 9, Subreophax cf. pseudoscalaris (Samuel, 1977), PCs0. 10, Subreophax scalaris (Grzybowski, 1896), PC11. 11-12, Subreophax splendidus (Grzybowski, 1898), PC060624 (11) and PC11 (12). 13, Arthrodendron subnodosiformis (Grzybowski, 1898), PC060615. 14, Arthrodendron grandis (Grzybowski, 1898), PC050515. 15-19, Kalamopsis grzybowskii (Dylążanka, 1923), PC18 (15), PC11 (16), PC18 (17), PC060621 (18) and PC060621 (19). Scale bar equals 0.5 mm.

FIGURE 15. Scanning electron micrographs of Usbekistaniinae from the Caltavuturo Formation cropping out at Portella Colla. 1, Glomospira extendens Emiliani, 1954, PC11. 2, Glomospira gordialis (Jones and Parker, 1860), PC060604. 3-16, Repmanina charoides (Jones and Parker, 1860), PC060604 (3), PC060601 (4), PC060604 (5), PC060603 (6), PC060611 (7), PC060601 (8), PC060603 (9), PC060621 (10), PC060621 (11), PC060617 (12), PCs0 (13), PCs0 (14), PC060604 (15) and PCs0 (16). Scale bar equals 0.5 mm.