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Species Globigerina spiralis Bolli 1957


Diagnosis / Definition:
Bolli (1957):
Shape of test medium to high trochospiral, biconvex, spiral side distinctly convex, umbilical side less so; equatorial periphery lobate; axial periphery rounded. Wall calcareous, perforate, surface smooth. Chambers inflated, globular or slightly compressed laterally; about 15, arranged in 3 whorls; the 5 6 chambers of the last whorl increase moderately in size. Sutures on spiral side radial or slightly curved, depressed; on umbilical side radial, depressed. Umbilicus narrow, open. Apertures distinct arches with faint lips, interiomarginal, umbilical; that of last chamber in some specimens tends to an extraumbilical umbilical position. Coiling random. Largest diameter of holotype 0.28 mm.
Systematics:

20
 Genus Globigerina
  Species Globigerina spiralis

32
 Ordo Foraminiferida
  Familia Globigerinidae
   Genus Globigerina
    Species Globigerina spiralis
Synonym list:
Bolli (1957):
1957 Globigerina spiralis Bolli. - Bolli : pl. 16, figs. 16-18 new species
Van Eijden & Smit (1991):
1957 Globigerina spiralis Bolli. - Bolli : p.70 pl. 16, figs. 16-18
1991 Globigerina spiralis Bolli. - Van Eijden & Smit : p.111
Was used in synonym list of:
Eoglobigerina spiralis Bolli 1957
Acarinina subsphaerica Subbotina 1947
Praemurica spiralis 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 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

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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This work is licensed under a Creative Commons Attribution 2.5 License.
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