Globotruncanella coarctata (Bolli 1957)

Neagu, Theodor, 2016, Micropaleontological Study Of The Gura Beliei Red Marls Formation From The Pietroșița Area (Turonian - Maastrichtian). Part Iii Campanian-Maastrichtian Planktonic Foraminifera, Acta Palaeontologica Romaniae 12 (2), pp. 67-91 : 74

Globotruncanella coarctata (Bolli 1957)

Figs. 3 :1-9; Figs. 8 :1-3

1957 Praeglobotruncana coarctata Bolli , p.53, pl.12, fig. 2-3.

1978 Globotruncanella coarctata (Bolli) Maslakova , p.106, pl.24, fig.4

Dimensions: D = 0,36 - 0,29 mm; d = 0,31- 0,26 mm Remarks: Ours specimens differs from the Bolli's 1957 species by the more inflated chambers on the spiral side. The very faint keel and the minute spines of the umbilical chambers are tipical to the Bolli's species.

Occurrence: Țâța Valley, Pietrosița- Fieni area Stratigraphic distribution: Maastrichtian ( Abatomphalus mayaroensis biozone)

Specimens: LPB.IV. 12437

Figures

Fig. 3: 1-9 Globotruncanella coarctata (Bolli 1957), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV. 12427; 10-17 Globotruncanella pshadae (Keller 1946), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12427; 18-20 Globotruncanella petaloidea (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12428; 21-24 Globotruncanella havanensis (Voorwjik 1937), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12329; 25-27 Globotruncanella saratogensis (Applin 1920), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV. 12441; 28-30 Rugotruncana subrugosa (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12420; 31 Schsckoina multispinata (Cush.Wick 1940), Maastrichtian, Țâța Valley, PietroȘița-Fieni (All specimens x 90).

Fig. 8: 1-3 Globotruncanella coarctata (Bolli 1957), Maastrichtian, Țâța Valley, PietroȘița, L.P.B.IV.12437; 4-6 Globigerinella glaessneri (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12418; 7-9 Archaeoglobigerina blowi Pessagno 1967, Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12449; 10-12 Rugotruncana subpenny (Gandolfi l955), Maastrichtian, Țâța Valley, PietroȘița, L.P.B.IV.12426; 13-18 Rugoglobigerina kelleri (Subbotina 1953), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12451; 19-21 Rugotruncana tilevi Brönnimannn & Brown 1955, Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12436; 22-27 Abatomphalus pessagnoi (Longoria 1973), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12434 (All specimens x 90).