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Globorotalia broedermanni Cushman & Bermudez 1949 from: Bolli, H.M. (1957): The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82
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Anonymous: Unedited TaxonConcept data
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Species Globorotalia broedermanni Cushman & Bermudez 1949


Alternative name:
Diagnosis / Definition:
Bolli (1957):
Shape of test biconvex, low trochospiral, moderately compressed; equatorial periphery nearly circular; axial periphery rounded to subangular. Wall calcareous, perforate, surface covered with short spines. Chambers subangular, inflated; about 12-15, arranged in 2 1/2 -3 whorls, the 5-6 chambers of the last whorl increasing slowly in size. Sutures on spiral side curved, slightly depressed between last chambers of final whorl; on umbilical side radial, slightly depressed. Umbilicus narrow, open. Aperture a low arch; interiomarginal, extraumbilical umbilical. Coiling over 90 percent dextral. Largest diameter of hypotype 0.33 mm.
Discussion / Comments:
Bolli (1957):
The origin of Globorotalia broedermanni Cushman and Bermudez cannot be traced in the Trinidad sections. The species appears at the base of the Globorotalia rex zone apparently fully developed and with a strong preference for dextral coiling (indicating an advanced evolutionary stage). A marked faunistic change between the Globorotalia rex zone and the older Globorotalia velascoensis zone indicates a hiatus in the studied sections. It is in this missing interval that possible ancestral forms of Globorotalia broedermanni have to be sought.
Systematics:

20
 Genus Globorotalia
  Species Globorotalia compressa
   Species Globorotalia velascoensis

24
  Genus Porticulasphaera
   Species Globigerapsis index
    Species Globorotalia aspensis
     Species Globorotalia broedermanni
      Species Porticulasphaera mexicana
Synonym list:
Bolli (1957):
1949 Globorotalia broedermanni Cushman & Bermudez. - Cushman & Bermudez : p. 40 pl. 7, figs. 22-24
1957 Globorotalia broedermanni Cushman & Bermudez. - Bolli : pl. 19, figs. 13-15
Bolli (1957):
1949 Globorotalia (Truncorotalia) broedermanni Cushman & Bermudez. - Cushman & Bermudez : p. 40 pl. 7, figs. 22-24
1957 Globorotalia broedermanni Cushman & Bermudez. - Bolli : p. 274 pl. 37, figs. 13a-c
1957 Globorotalia broedermanni Cushman & Bermudez. - Bolli : p. 80 pl. 19, figs. 13-15
Was used in synonym list of:
References:

Cushman,J.A. and Bermudez,P.J. (1949):
Some Cuban species of Globorotalia . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 25 p. 26-44

Bolli,H.M. (1957):
The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82

Bolli,H.M. (1957):
Planktonic Foraminifera from the Eocene Navet and San Fernando formations of Trinidad, B.W.I. . Bull. U.S. natl. Mus. Vol. 215 p. 155-172
Anonymous: Unedited TaxonConcept data
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