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Globigerina (Globigerina) umbilicata Orr & Zaitzeff 1971 from: Kennett, J.Srinivasan, M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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Species Globigerina (Globigerina) umbilicata Orr & Zaitzeff 1971


Alternative name:
Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test medium to large, low trochospiral; chambers spherical to subspherical, increasing slowly in size as added, five to six in the final whorl; sutures distinctly depressed, often with a reduced final chamber (kummerform). Surface similar to Gg. (Gg.) bulloides. Umbilicus very large, deep. Aperture large, umbilical, with a thin lip.
Discussion / Comments:
Kennett & Srinivasan (1983):
This species differs from Gg. (Gg.) bulloides in exhibiting one or two more chambers in the final whorl distinctly incised sutures on the spiral side, and more conspicuous umbilicus. Dominantly a temperate species.
Systematics:

3
 Classis Foraminifera
  Genus Beella
   Genus Globigerina
    Species Globigerina (Globigerina) umbilicata
Synonym list:
Kennett & Srinivasan (1983):
1971 Globigerina umbilicata Orr & Zaitzeff. - Orr & Zaitzeff : p.18 pl 1 figs 1-4
References:

Orr,W.N. and Zaitzeff,J.B. (1971):
A new planktonic foraminiferal species from the California Pliocene . Journal of Foraminiferal Research Vol. 1 p. 17-19

Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.

Anonymous: Unedited TaxonConcept data
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