Bolli & Saunders (1985):
With few exceptions (Stainforth et al., 1975) the species has been recorded only from the Holocene. Because of its tumid, somewhat elongate test it was considered to be related to G. tumida. However, the test, including the peripheral keel, is much more delicately built. specimens when present are as a rule considerably less frequent than G. tumida.
Chaisson & Leckie (1993):
Similar species: The smooth finely perforate texture distinguishes this species
from Globorotalia tumida, which is always a rough textured species. In Hole
806B, unusually deep records of G. ungulata cause its range to overlap with that
of G. plesiotumida, with which it shares an oblong form and a final chamber that,
on the spiral side, is longer radially than it is wide. Both species are also more
inflated on the umbilical side, and the most reliable way to separate them is by
the smooth glassy texture and higher dorsal spire of G. ungulata. |
Bermudez,P.J. (1960): Contribución al estudio de las Globigerinidae de la región Caribe-Antillana (Paleoceno-Reciente) . Mem. Tercer Congr. Geol. Venezolano Vol. 3
Bermudez,P.J. (1961): Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleocene-Reciente). In: Boletino Geologia (Venezuela), Special Publicacion Vol. 3
Kennett,J. and Srinivasan,M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
Bolli,H.M. and Saunders,J.B. (1985): Oligocene to Holocene low latitude planktic foraminifers. In: Plankton Stratigraphy Eds: Bolli, H.M.Saunders, J.B. p. 155-262
Vincent,E. and Toumarkine,M. (1990): Neogene planktonic foraminifers from the Western Tropical Indian Ocean, Leg 115. In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 115 Eds: Duncan, R.A..Backman, J.Peterson, L.C. p. 795-836
Chaisson,W.P. and Leckie,R.M. (1993): High-Resolution Planktonic Foraminifer Biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific). In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 130 Eds: Berger, W.H.Kroenke, L.W..Mayer, L.A..et al. p. 137-178
Chaisson,W.P. and Pearson,P.N. (1997): Planktonic foraminifer biostratigraphy at Site 925: middle Miocene–Pleistocene. In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 154 Eds: Shackleton, N.J.Curry, W.B.Richter, C.Bralower, T.J.
Chaisson,W.P. and d'Hondt,S.L. (2000): Neogene planktonic foraminifer biostratigraphy at Site 999, Western Caribbean Sea. In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 165 Eds: Leckie, R.M.Sigurdsson, H.Acton, G.D.Draper, G. p. 19-56
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