Globotruncanella sarmientoi ( Gandolfi 1955 )

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 sarmientoi ( Gandolfi 1955)

Figs. 5 : 15-27; Figs. 13 : 19-26; Figs. 14 : 1-3; Figs. 15 : 13-24

1955 Globotruncana caliciformis ssp. sarmientoi Gandolfi , p.47, pl.3, fig.3 a-c

Dimensions: D = 0,53- 0,43 mm; d = 0,40- 0,36 mm; g = 0,19- 0,17 mm

Remarks: The general aspect of the shell is specific to the genus Globotruncanella . Gandolfi (1955, p. 48) mention: " This species is morphologically related to Globorotalia pshadae Keller 1946 ". In contrast with Kellerr's species, G. sarmientoi differs by the large size; the presence of a double keel from the peripheral margins of the early chambers (the peripheral keel) is represented by a row of muricae. The last chamber or the last two chambers present only one keel smooth not rugose as there are on the early chambers. Ordinary on the umbilical side the early chambers a strong to weak rouged aspect. From the Gandolfi's species ours specimens differs by the aspect of the spiral side, where the chambers have a moderate inflated and smooth aspect. From Globotruncanella havanensis (Vootwjik l937) emend. Brönnimann & Brown 1955, ours specimens differs by the presence of a double peripheral keel on the early chambers, the presence of a single smooth keel on the last two chambers and the moderate convex but not flat aspect of the spiral size.

Occurrences: Țâța Valley, Pietrosița- Fieni area Stratigraphic distribution: Upper Maastrichtian Specimens: LPB.IV.12448

Figures

Fig. 5: 1-3 Rugoglobigerina pennyi Brönnimann 1952, Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12417; 4-6 Rugoglobigerina pustulata Brönnimann 1952, Maastrichtian, Țâța Valley, PietroȘița, L.P.B.IV.12415; 7-9 Rugoglobigerins kelleri (Subbotina 1953), Maastrichtian, Țâța Valley, PietroȘița, L.P.B.IV.12451; 10-12, 27-29 Rugoglobigerina macrocephala Brönnimann, Maastrichtian, Țâța Valley, PietroȘița, L.P.B.IV.12413; 13-15, 19-24 Rugotruncana ellissi Brönnimann & Brown 1955, Maastrichtian, Țâța Valley, PietroȘița, L.P.B.IV 12426; 16-18 Rugoglobigerina loetterli (Nauss 1947), Maestrichtian, Maastrichtian, Țâța Valley, PietroȘița, L.P.B.IV.12443; 15-27 Globotruncanella sarmientoi (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița LPB.12448 (All specimens x 90).

Fig. 13: 1-3 Rugotruncana subpennyi (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12426; 4-6 Rugotruncana subhexacamerata (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12422; 7-12 Archaeoglobigerina blowi Pessagno 1967, Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12441; 13-15 Globotruncanella pshadae (KELLER 1946), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12427; 16-18 Rugoglobigerina kelleri (Subbotina 1953), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12451; 19-26 Globotruncanella sarmientoi (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12448 (All specimens x 90).

Fig. 14: 1-3 Globotruncanella sarmientoi (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12448; 4-12 Archaeoglobigerina blowi (Pessagno 1967), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12449; 13-15 Rugoglobigerina pustulata Brönnimann 1952, Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12415; 16-24 Rugoglobigerina ordinaria (Subbotina 1953), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12446; 25-29 Rugoglobigrerina kelleri (Subbotina 1953 Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12451; 30-31 Rugoglobigerina rotundata Brönnimann 1952 Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12416 (All specimens x 90).

Fig. 15: 1-3 Globigerinella glaessneri (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12418; 4-12 Rugotruncana subcircumnodifer (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12439; 13-24 Globotruncanella sarmientoi (Gandolfi 1955), Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12448; 25-27 Rugoglobigerina kingi Trujillo 1960, Maastrichtian, Țâța Valley, PietroȘița, LPB.IV.12450 (All specimens x 90).