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Species Globigerina ciperoensis Bolli 1954


Alternative name:
Globigerina (Globigerina) ciperoensis Bolli 1954
Discussion / Comments:
Bolli (1957):
A considerable variation is observed within the species Globigerina ciperoensis Bolli. The forms included originally in this species (Bolli, 1954) have a characteristically large umbilicus; they are now given subspecies rank (G. ciperoensis ciperoensis). All gradations occur to forms with a small umbilicus associated with the typical representatives, but those with smaller umbilicus become predominant towards the end of the Globigerina ciperoensis ciperoensis zone, where the typical G. ciperoensis ciperoensis disappear. They continue into the Globorotalia kugleri zone and lower part of the Catapsy drax dissimilis zone. This form is here described as a new subspecies, Globigerina ciperoensis angudiumbilicata. Another subspecies, Globigerina ciperoensis angulisuturalis has been erected for specimens that show deep, angular, U shaped sutures between the chambers of the last whorl. Transitional forms to G. ciperoensis ciperoensis are common. The new subspecies appears to be restricted to the Globorotalia opima opima zone and the Globigerina ciperoensis ciperoensis zone.
Van Eijden & Smit (1991):
Remarks. This zonal marker is very rare at Sites 757 and 758. Most specimens we observed are intermediate with G. angustiumbilicata Bolli, 1957a.
Systematics:

22
 Genus Dentoglobigerina
  Informal Group Globigerina ciperoensis
   Species Globigerina ciperoensis

32
 Ordo Foraminiferida
  Familia Globigerinidae
   Genus Globigerina
    Species Globigerina ciperoensis
Synonym list:
Bolli (1957):
1957 Globigerina ciperoensis Bolli. - Bolli :
Van Eijden & Smit (1991):
1954 Globigerina ciperoensis Bolli. - Bolli : 1-3 figs. 3-4
1991 Globigerina ciperoensis Bolli. - Van Eijden & Smit : p.110
Vincent & Toumarkine (1990):
1954 Globigerina ciperoensis Bolli. - Bolli : p. 1 figs. 3-6
1990 Globigerina ciperoensis Bolli. - Vincent & Toumarkine : p. 796
Spezzaferri & Silva (1990):
1957 Globigerina ciperoensis Bolli. - Bolli : pl. 22; fig. 10a-b
1990 "Globigerina" ciperoensis Bolli. - Spezzaferri & Silva : 241, 242 pl. IV, fig. 7a-b; pl. V, fig. 3a-c, 4a-d
Was used in synonym list of:
Globigerina (Globigerina) ciperoensis Bolli 1954
References:

Bolli,H.M. (1954):
Note on Globigerina concinna Reuss 1850 (Point-a-Pierre, Trinidad) . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 5(1)

Bolli,H.M. (1957):
Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I..
In: Studies in Foraminifery, Bulletin of the U.S. National Museum Vol. 215 Eds: Loeblich, A.R.Tappan, H.Beckmann, J.P.Bolli, H.M.Gallitelli, E.M.Troelsen, J.C. p. 97-123

Spezzaferri,S. and Silva,I.S.. (1990):
Oligocene planktonic foraminiferal biostratigraphy and paleoclimatic interpretation from Hole 538A, DSDP Leg 77, Gulf of Mexico . Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 83 p. 217-263

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

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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