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Species Globorotalia angulata White 1928


Alternative name:
Globorotalia (Truncorotalia) angulata White 1928
Globorotalia (Morozovella) angulata White 1928
Diagnosis / Definition:
Bolli (1957):
Shape of test very low trochospiral, spiral side almost flat, umbilical side distinctly convex; equatorial periphery distinctly lobate; axial periphery acute, ornamented with minute spines in well preserved specimens. Wall calcareous, perforate, finely spinose, especially the umbilical side. Chambers angular, inflated; 12-15, arranged in 2 1/2 - 3 whorls, the 5 chambers of the last whorl increasing rapidly in size. Sutures on spiral side strongly curved, slightly depressed; on umbilical side radial, strongly depressed. Umbilicus narrow, deep, open. Aperture a narrow slit; interiomarginal, extraumbilical umbilical. Coiling random. Largest diameter of figured hypotype 0.41
Discussion / Comments:
Bolli (1957):
Globorotalia angulata (White) differs from the ancestral G. uncinata Bolli, new species, in having subangular chambers and an acute periphery. G. angulata is regarded as the ancestor of G. aequa Cushman and Renz. It is further closely related to G. angulata abundocamerata Bolli, new subspecies.
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globorotaliaceae
       Superfamilia Nonionacea
        Familia Globorotaliidae
         Genus Globorotalia
          Species Globorotalia angulata

20
  Genus Globorotalia
   Species Globorotalia angulata
Synonym list:
Bolli (1957):
1928 Globigerina angulata White. - White : pp. 191-192 pl. 27, figs. 13a-c
1957 Globorotalia angulata White. - Bolli : pl. 27, figs. 7-9
Was used in synonym list of:
Morozovella angulata White 1928
References:

White,M.P. (1928):
Some index foraminifera of the Tampico embayment of Mexico, Part 2 . Journal of Paleontology Vol. 2(4) p. 280-313

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
Anonymous: Unedited TaxonConcept data
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This work is licensed under a Creative Commons Attribution 2.5 License.
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