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Species Heterohelix globulosa Ehrenberg 1840


Discussion / Comments:
Caron (1985):
The globular chambers increase gradually in size, except for the late chambers, which increase more rapidly. Faint costae are present on all chambers.
Huber (1990):
Most forms included in this species resemble the specimen shown on Pl. 1, Fig. 3, which has fine costate ornamentation on all chambers. However, some (e.g., Pl. 1, Fig. 4) have an elongate test with pustulose surface ornament on the earlier chambers, resembling Heterohelix papula Belford, which was described from the Santonian Toolonga Calcilutite in Western Australia (Belford, 1960, 1983), but has not since been reported elsewhere.
Van Eijden & Smit (1991):
Remarks. Intermediate forms with the more compressed H. planata (Cushman, 1938) are common. This species is rare in all Maestrichtian samples, and more common in older samples.
Systematics:

5
 Classis Foraminifera
  Familia Heterohelicidae
   Genus Heterohelix
    Species Heterohelix globulosa
Synonym list:
Caron (1985):
1840 Textularia globulosa Ehrenberg. - Ehrenberg : p.135 pl 4 figs 2,4,5,7,8
1967 Heterohelix globulosa Ehrenberg. - Pessagno : p.260 fig 5
1985 Heterohelix globulosa Ehrenberg. - Caron : 55, 56 fig 24.5
Huber (1990):
1840 Textularia globulosa Ehrenberg. - Ehrenberg : p. 135 pl. 4, figs. 2B, 4B, 5B, 7B, 8B.
1990 Heterohelix globulosa Ehrenberg. - Huber : Pl. 1, Figs. 3, 4
Van Eijden & Smit (1991):
1840 Textularia globulosa Ehrenberg. - Ehrenberg : p.135 pl. 4, figs. 2, 4-5, 7-8
1991 Heterohelix globulosa Ehrenberg. - Van Eijden & Smit : p.104
References:

Ehrenberg,G.C. (1840):
Über die Bildung der Kreidefelsen und des Kreidemergels durch unsichtbare Organismen . Abhandlungen der Königliche Akademie der Wissenschaften zu Berlin Vol. 1838 p. 59-147

Pessagno,E.A. (1967):
Upper Cretaceous planktonic foraminifera from the West Coastal Plain . Palaeontographia Americana Vol. 5 p. 259-441

Caron,M. (1985):
Cretaceous planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86

Huber,B.T. (1990):
Maestrichtian planktonic foraminifer biostratigraphy of the Maud Rise (Weddell Sea, Antarctica): ODP Leg 113 Holes 689B and 690C.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 113 Eds: Barker, P.F.Kennett, J.P.O'Connell, S.B.Pisias, N.G. p. 489-513

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123
Anonymous: Unedited TaxonConcept data
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