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Species Rugoglobigerina hexacamerata Brönnimann 1952


Discussion / Comments:
Caron (1985):
R. hexacamerata differs from other Rugoglobigerina species in generally having 6 globular chambers froming the last whorl, increasing only slowly in size. The species evolved from R. rugosa which differs in having only 4-5 chambers, increasing more rapidly in size.
Van Eijden & Smit (1991):
Remarks. R. hexacamerata occurs in the Maestrichtian and is usually rare. Intermediate forms with its ancestor, Archaeoglobigerina cretacea (d'Orbigny, 1840), and its descendant, Rugotruncana subcircumnodifer (Gandolfi, 1955), occur.
Systematics:

5
 Classis Foraminifera
  Familia Globotruncanidae
   Genus Rugoglobigerina
    Species Rugoglobigerina hexacamerata
Synonym list:
Caron (1985):
1952 Rugoglobigerina reicheli hexacamerata Brönnimann. - Brönnimann : 23-25 pl 2 figs 10-12 (type reference)
1952 Rugoglobigerina rugosa pennyi Brönnimann. - Brönnimann : p.34 pl 4 figs 1-3
1955 Globotruncana (Rugoglobigerina) hexacamerata subhexacamerata Gandolfi. - Gandolfi : p.34 pl 1 fig 11
1985 Rugoglobigerina hexacamerata Brönnimann. - Caron : p.74 34.1-2
Van Eijden & Smit (1991):
1952 Rugoglobigerina (Rugoglobigerina) reicheli hexacamerata Brönnimannn. - Brönnimann : p.23 pl. 2, figs. 10-12
1991 Rugoglobigerina hexacamerata Brönnimann. - Van Eijden & Smit : p.107
References:

Brönnimann,P. (1952):
Globigerinidae from the upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B.W.I. . Bulletins of American paleontology Vol. 34 p. 5-71

Gandolfi,R. (1955):
The genus Globotruncana in Northeastern Colombia . Bulletins of American paleontology Vol. 36 p. 7-118

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

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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