Ammosphaeroidina pseudopauciloculata (Mjatliuk, 1966)

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 : 42

Ammosphaeroidina pseudopauciloculata (Mjatliuk, 1966)

Figure 19.9-10

1896 Trochammina pauciloculata Brady ; Grzybowski, p. 23, pl. 8, figs. 51, 52.

1960 Cystammina pauciloculata (Brady) ; Geroch, p. 66, pl. 6, fig. 8.

1966 Cystamminella pseudopauciloculata Mjatliuk ; p. 264, pl. 1, figs. 5-7, pl. 2, fig. 6, pl. 3, fig. 3.

1990 Ammosphaeroidina pseudopauciloculata (Mjatliuk) ; Kuhnt, p. 311, pl. 5, fig. 1.

2004 Ammosphaeroidina pseudopauciloculata (Mjatliuk) : Green, Kaminski, and Sikora, p. 125, pl. 5, fig. 3.

Material. 25 specimens from 10 samples.

Description. Test free, compressed, trochospirally coiled, trilobate in outline, elliptic and elongated in axial view or quadrilobate in ventral view, subelliptic in lateral view; 3-4 chambers in the last whorl increasing regularly in size covering the previous whorls. Chambers circular in outline, lenticular or subspheric with rounded periphery; sutures distinct, depressed. Aperture not distinguishable; wall smooth, finely agglutinated.

Distribution. Cosmopolitan species common from the Cretaceous to the Eocene ( Kaminski and Gradstein, 2005), less frequent in the Oligocene, and signaled in the Miocene ( Green et al., 2004; Kender et al., 2009).

Figures

FIGURE 19. Scanning electron micrographs of Haplophragmoididae (1-6), Sphaeramminidae (7-10), Lituolidae (11- 14), and Recurvoidea (15-25) from the Caltavuturo Formation cropping out at Portella Colla. 1-2, Haplophragmoides cf. latissimusuturalis Smith, 1971, PC3. 3, Haplophragmoides sp. 3, PC060615. 4, Haplophragmoides sp. 4, PC060601. 5, Haplophragmoides sp. 5, PC060615. 6, Haplophragmoides sp. 6, PC060621. 7-8, Praesphaerammina subgaleata (Vašiček, 1947), PC11 (7) and PC1 (8). 9-10, Ammosphaeroidina pseudopauciloculata (Mjatliuk, 1966), PC060604 (9) and PC060604 (10). 11, Ammobaculites agglutinans (d’Orbigny, 1846), PC060615. 12, Ammobaculites sp. 1, PC060607. 13, Ammobaculites sp. 3, PC15. 14, Ammobaculites sp. 2, PC060625. 15-16, Budashevaella multicamerata (Voloshinova and Budasheva, 1961), PC060604. 17, Cribrostomoides subglobosus (Cushman, 1910), PC060604. 18, Recurvoidella lamella (Grzybowski, 1898), PC060601. 19, Recurvoides anormis Mjatliuk, 1970, PC5. 20, Recurvoides sp. 1, PC060601. 21, Recurvoides sp. 2, PC060623. 22, Recurvoides nucleolus (Grzybowski, 1898), MM3. 23, Recurvoides walteri (Grzybowski, 1898), PC5. 24, Trochammina bifaciata Friedberg, 1901, PC060604. 25, Thalmannammina subturbinata (Grzybowski, 1898), MM14. Scale bar equals 0.5 mm.