Paratrochamminoides acervulatus ( 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 : 29

Paratrochamminoides acervulatus ( Grzybowski, 1896)

Figure 16.14

1896 Trochammina acervulata ; Grzybowski, p. 274,

pl. 9, fig. 4. 2005 Paratrochamminoides acervulatus (Grzybowski) ; Kaminski and Gradstein, p. 290, pl.

59, figs. 1-7. Material. Nine specimens from six samples. Description. Test free, ovoid, the sack-shaped chambers are arranged in a conic and irregular trocospire. The ventral side shows a depressed umbelicus. Wall thick, finely agglutinated, aperture at the base of the last chamber. Distribution. Late Cretaceous–Eocene ( Kaminski and Gradstein, 2005).

Figures

FIGURE 16. Scanning electron micrographs of Reophacidae (1-3), Hormosinidae (4-13), and Lituotubidae (14-20) from the Caltavuturo Formation cropping out at Portella Colla. 1, Reophax duplex Grzybowski, 1896, PC060624. 2, Reophax pilulifer Brady, 1884, PC13. 3, Reophax sp. 1, PC060615. 4-5, Hormosina velascoensis (Cushman, 1926), PC060617 (4) and PC11 (5). 6, Hormosina trinitatensis Cushman and Renz, 1946, PC11. 7, Hormosina sp. 1, PC060624. 8, Hormosina sp. 2, PC060615. 9-11, Pseudonodosinella elongata Grzybowski, 1898, PC11 (9), PC060601 (10) and PCs0 (11). 12-13, Pseudonodosinella nodulosa Brady, 1879, PC11 (12) and PC060617 (13). 14, Paratrochamminoides acervulatus (Grzybowski, 1896), PC13. 15, Paratrochamminoides deflexiformis (Noth, 1912), PC060615. 16, Lituotuba lituiformis (Brady, 1879), PC060615. 17, Paratrochamminoides sp. 1, PC060601. 18, Paratrochamminoides draco (Grzybowski, 1901), PC11. 19, Paratrochamminoides mitratus (Grzybowski, 1901), PCs0. 20, Conglophragmium deforme (Grzybowski, 1898), PC060623. Scale bar equals 0.5 mm.