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Globorotalia tumida flexuosa Koch 1923 from: Vincent, E.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
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Anonymous: Unedited TaxonConcept data
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Subspecies Globorotalia tumida flexuosa Koch 1923


Alternative name:
Discussion / Comments:
Bolli & Saunders (1985):
This subspecies is a variant of G. tumida tumida with an additional chamber or two which become saddle like, strongly bent down or flexed towards the umbilical side. Such forms are not necessarily restricted to certain stratigraphic levels but appear to be controlled rather by particular environmental conditions. G. tumida flexuosa was common in the younger Pleistocene of the Atlantic province, becoming extinct there some 80000 years ago. However, virtually identical forms already occurred much earlier, for example in the Early Pliocene Globorotalia margaritae Zone in well Bodjonegoro I of Java (Bolli, 1966b). More locally, or within a given province, G. tumida flexuosa may serve as a useful index.
Synonym list:
Bolli & Saunders (1985):
1923 Pulvinulina tumida var. flexuosa Koch. - Koch : p.357 text-figs. 9,10
1985 Globorotalia tumida flexuosa Koch. - Bolli & Saunders : 225, 228 figs. 33.6, 34.14-16; 6,10,11
Vincent & Toumarkine (1990):
1923 Pulvinulina tumida var. flexuosa Koch. - Koch : p. 351 figs. 9 and 10
1990 Globorotalia tumida flexuosa Koch. - Vincent & Toumarkine : p. 834 pl.5, figs. 8-10
References:

Koch,R. (1923):
Die jungtertiäre Foraminiferen fauna von Kabu (Res. Surabaja, Java) . Ecoglae geologicae Helvetiae Vol. 18(2)

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
Anonymous: Unedited TaxonConcept data
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