Trochamminoides grzybowskii Kaminski and Geroch, 1992

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 : 33

Trochamminoides grzybowskii Kaminski and Geroch, 1992

Figure 17.5

1898 Trochammina elegans Rzehak ; Grzybowski, p. 287, pl. 11, fig. 10.

1977 Trochamminoides elegans (Grzybowski) ; Samuel, p. 45, pl. 4, fig. 17.

1992 Trochamminoides grzybowskii ; Kaminski and Geroch, p. 64, fig. 1a, b.

2005 Trochamminoides grzybowskii Kaminski and Geroch ; Kaminski and Gradstein, p. 311, pl. 66, figs. 1-4.

Material. Four specimend from four samples.

Description. Test free, large, elliptic or subcircular in outline, 2–3 whorls planispirally evolute coiled. Chambers numerous, subspheric, sutures depressed, well distinct at regular distance. Wall finely agglutinated, smooth surface. Aperture small at the base of the last chamber.

Distribution. Coniacian–Eocene ( Kaminski and Gradstein, 2005).

Figures

FIGURE 17. Scanning electron micrographs of Lituotubidae (1-3, 7, 9, 11-12) and Trochamminoidae (4-6, 8, 10) from the Caltavuturo Formation cropping out at Portella Colla. 1-2, Paratrochamminoides heteromorphus (Grzybowski, 1898), MM12 (1) and MM14 (2). 3, Conglophragmium irregulare (White, 1928), PCs0. 4, Trochamminoides coronatus (Brady, 1879), MM14. 5, Trochamminoides grzybowskii Kaminski and Geroch, 1992, MM1. 6, Trochamminoides subcoronatus (Grzybowski, 1896), MM1. 7, Paratrochamminoides cf. olszewskii (Grzybowski, 1898), PC060615. 8, Trochamminoides dubius (Grzybowski, 1901), PC060611. 9, Paratrochamminoides olszewskii (Grzybowski, 1898), PC11. 10, Trochamminoides dubius (Grzybowski, 1901), PC060611. 11, Paratrochamminoides aff. olszewskii (Grzybowski, 1898), PC060615. 12, Paratrochamminoides aff. gorayskii (Grzybowski, 1898), PC060615. Scale bars equal 0.5 mm.