Karrerulina conversa ( Grzybowski, 1901 )

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 : 45

Karrerulina conversa ( Grzybowski, 1901)

Figure 20.6-10

1901 Gaudryna conversa ; Grzybowski, p. 285, pl. 7, figs. 15, 16.

1977 Plectina conversa (Grzybowski) ; Krasheninnikov and Pflaumann, p. 569, pl. 3, fig. 4a-b.

1992 Karrerulina conversa (Grzybowski) ; Morlotti and Kuhnt, p. 222, pl. 4, fig. 15. 2005 Karrerulina conversa (Grzybowski) ; Kaminski and Gradstein, p. 469, pl. 116, figs.1-11. Material. 26 specimens from 10 samples. Description. Test free, elongated, initial trochospiral coil, followed by a triseriate stage, and finally a biseriate adult stage. Aperture terminal and circular. Distribution. Paleocene–Oligocene ( Kaminski and Gradstein, 2005).

Figures

FIGURE 20. Scanning electron micrographs of Trochamminoidea (1-11, 13), Ataxophragmiidae (12, 17, 20-21), and Textulariina (14-16, 18-19, 22-23) from the Caltavuturo Formation cropping out at Portella Colla. 1, Trochammina sp. 1, PC060601. 2, Trochammina sp. 2, PC060601. 3, Trochammina sp. 3, PC060601. 4, Trochammina sp. 4, PC060604. 5, Trochammina sp. 5, PC060605. 6-10, Karrerulina conversa (Grzybowski, 1901), PC060615 (6), PC018 (7), PC11 (8), PC060615 (9) and PCs0 (10). 11, Karrerulina horrida (Mjatliuk, 1970), PC060617. 12, Remesella varians (Glaessner, 1937), PC060601. 13, Gaudryina sp., PC1. 14, Eggerella compressa (Andreae, 1884), PC13. 15, Eggerella sp. 1, PC3. 16, Eggerella sp. 2, PC3. 17, Arenobulimina sp., PC060602. 18, Siphotextularia sp. 1, PC060621. 19, Siphotextularia sp. 2, PC060621. 20, Tetraxiella subtilissima PCs0. 21, Gravellina sp., PC060618. 22, Valvulina flexilis Cushman and Renz, 1941, PC060604. 23, Valvulina sp., PC060621. Scale bars equal 0.5 mm.