Neogloboquadrina dutertrei dutertrei d'Orbigny 1839 from: Bolli, H.M.Saunders, J.B. (1985): Oligocene to Holocene low latitude planktic foraminifers. In: Plankton Stratigraphy Eds: Bolli, H.M.Saunders, J.B. p. 155-262 | . |
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Subspecies Neogloboquadrina dutertrei dutertrei d'Orbigny 1839 |
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| Discussion / Comments: |
Bolli & Saunders (1985):
With the base of the Pliocene begin to appear low, medium and high spired forms of considerable size range, with 4-7 chambers in the last whorl, with apertures restricted mainly to an umbilical position. Such forms may also possess umbilical tooth like flaps. Bandy et at. (1967) subdivide N. dutertrei into the subspecies dutertrei with tooth like apertural flaps and subcretacea (Lomnicki) (=subspecies blowi, see Rögl & Bolli, 1973, p. 570) without these features. On fig. 1, p. 154, they demonstrate that the subspecies dutertrei developed from the subspecies 'subcretacea' in the Late Pliocene and remained restricted to tropical latitudes through to the present day thus constituting a good environmental indicator. Contrary to other authors, Bandy et at believe that the subspecies 'subcretacea' developed in Late Miocene from Globorotalia globorotaloidea (Colom). In the Mediterranean area medium spired forms, commonly with 5 chambers in the last whorl and an umbilicalextraumbilical aperture bordered by a thick lip, occur in the latest Miocene. They are included in N. dutertrei even though the distinguishing features (tooth like flaps and umbilical position of aperture) of the genus are not present. |
| Synonym list: |
Bolli & Saunders (1985):
1857 Globigerina dubia Egger. - Egger : According to Banner&Blow (1961) Brady's figures represent three different speciments
1901 Globigerina eggeri Rhumbler. - Rhumbler : p.19 pl.20, figs.20a-c (after Brady, 1884, pl.79, figs. 17a-c, there designated)
1960 Globigerina eggeri Rhumbler. - Banner & Blow : p.11 pl.2, figs.4a-c
(4a after Brady, 1884, pl.79, fig.17a; 4b and 4c are other views of the same specimen)
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| References: |
d'Orbigny,A.D. (1839):
Foraminifères.
In: Histoire Physique, Politique et Naturelle de l'ile de Cuba2 (atlas vol 8 pls 1-12) Eds: de la Sagra, R. p. 1-224
Egger,J.G. (1857):
Die Foraminiferen der Miocän-Schichten bei Ortenburg in Nieder-Bayern . Neues Jahrb. Mineral. Geognos. Geol. Petrefacten Kunde p. 266-311
Rhumbler,L. (1901):
Nordische Plankton-Foraminiferen.
In: Nordisches Plankton Vol. 1 Eds: Brandt, K. p. 1-33
Banner,F.T. and Blow,W.H. (1960):
Some primary types of species belonging to the superfamily Globigerinaceae . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 11(1) p. 1-41
Bolli,H.M. and Saunders,J.B. (1985):
Oligocene to Holocene low latitude planktic foraminifers.
In: Plankton Stratigraphy Eds: Bolli, H.M.Saunders, J.B. p. 155-262
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