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Subspecies Globigerina soldadoensis angulosa Bolli 1957


Diagnosis / Definition:
Bolli (1957):
Shape of test low trochospiral, spiral side slightly convex to flat, umbilical side strongly inflated; equatorial periphery distinctly lobate; axial periphery subangular. Wall calcareous, perforate, distinctly spinose. Chambers subangular, inflated; about 12, arranged in 2 1/2 whorls, the 5 chambers of the last whorl increasing fairly rapidly in size. Sutures on spiral side oblique, depressed; on umbilical side radial, depressed. Umbilicus medium sized, open. Apertures low arches; interiomarginal umbilical. Coiling random. Largest diameter of holotype 0.57 min.
Discussion / Comments:
Bolli (1957):
Globigerina soldadoensis angulosa Bolli, new subspecies, differs from G. soldadoensis Bronnimann in the more angular shape of the chambers. It also has a more restricted stratigraphic range.
Transitional forms indicate that Globigerina soldadoensis angulosa is likely to be the ancestor of Globorotalia aspensis (Colom).
Systematics:

20
 Genus Globigerina
  Species Globigerina soldadoensis
   Subspecies Globigerina soldadoensis angulosa

32
 Ordo Foraminiferida
  Familia Globigerinidae
   Genus Globigerina
    Species Globigerina soldadoensis
     Subspecies Globigerina soldadoensis angulosa
Synonym list:
Bolli (1957):
1957 Globigerina soldadoensis angulosa Bolli. - Bolli : pl. 16, figs. 4-6 new subspecies
Bolli (1957):
1957 Globigerina soldadoensis angulosa Bolli. - Bolli : p. 272 pl. 35, 8a-c
1957 Globigerina soldadoensis angulosa Bolli. - Bolli : p. 71 pl. 16, figs. 4-6
Was used in synonym list of:
Acarinina soldadoensis angulosa Bolli 1957
Acarinina angulosa Bolli 1957
References:

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
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