Psammosiphonella cylindrica ( Glaessner, 1937 )

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 : 20

Psammosiphonella cylindrica ( Glaessner, 1937)

Figure 12.4-5

1937 Rhabdammina cylindrica ; Glaessner, p. 354, pl. 1, fig. 1.

1952 Psammosiphonella cylindrica (Glaessner) ; Avnimelech, p. 65.

1992 Rhabdammina cilindrica ; Glaessner; Morlotti and Kuhnt, p. 223, pl. 2, fig. 1.

2005 Psammosiphonella cylindrica (Glaessner) ; Kaminski and Gradstein, p. 119, pl. 5/6, fig. 9- 13.

2009 Rhabdammina cylindrica (Glaessner) ; Kender, Kaminski and Jones, p. 492, pl. 1, fig. 1.

Material. 238 specimens from 21 samples.

Description. Test tubular with circular section. Wall thick, composed of quartz grains dispersed in siliceous cement. Surface rough, aperture a simple terminal opening. Against the light is clearly visible the central siphon.

Distribution. Known in flysh-type deposits from the Cretaceous.

Remarks. Psammosiphonella cylindrica differs from Rhabdammina discreta Brady, 1884 in the absence of constrictions, and in having smoother surface. Psammosiphonella linearis is smaller and thinner, and has a more evident siphon.

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.