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Turborotalia cerroazulensis frontosa Subbotina 1953 from: Toumarkine, M.Luterbacher, H.P. (1985): Paleocene and Eocene Planktic Foraminifera. In: Plankton Stratigraphy p. 87-154
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Anonymous: Unedited TaxonConcept data
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Subspecies Turborotalia cerroazulensis frontosa Subbotina 1953


Discussion / Comments:
Toumarkine & Luterbacher (1985):
The rather high arch-like aperture with a faint lip separates this form from species of Eocene Globigerina with which it may share the general morphology of the test. The aperture has an umbilical-extraumbilical position but does not reach the periphery of the test. Within the Turborotalia cerroazulensis lineage, the aperture extends to the periphery in the subspecies possagnoensis and pomeroli, it then migrates back towards the umbilicus in the subspecies cerroazulensis and finally reoccupies the same position as in the subspecies frontosa in the Late Eocene subspecies cocoaensis and cunialensis. Another important characteristic of the subspecies frontosa is the size and shape of the last chamber which is globular and occupies about one half of the entire test.
Systematics:

15
 Classis Foraminifera
  Species Turborotalia cerroazulensis
   Subspecies Turborotalia cerroazulensis frontosa
Synonym list:
Toumarkine & Luterbacher (1985):
1953 Globigerina frontosa Subbotina. - Subbotina : p.84 pl 12 figs 3a-c (type reference)
1957 Globigerina boweri Bolli. - Bolli : p.163 pl 36 figs 1a-c
1985 Turborotalia cerroazulensis frontosa Subbotina. - Toumarkine & Luterbacher : 136, 138 figs 34.11, 35.16-18
Was used in synonym list of:
References:

Subbotina,N.N. (1953):
Fossil foraminifera of the USSR. Globigerinidae, Hantkeninidae and Globorotaliidae [in Russian] . Trudy Vsesoyuznogo Neftyanogo Nauchno-Isledovatelskogo Geologo-Razvedochnogo Instituta (VNIGRI), Novaya Seriya Vol. 76 p. 1-296

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

Toumarkine,M. and Luterbacher,H.P. (1985):
Paleocene and Eocene Planktic Foraminifera.
In: Plankton Stratigraphy p. 87-154
Anonymous: Unedited TaxonConcept data
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