Dentoglobigerina

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globorotalidae -> Dentoglobigerina
Sister taxa: Berggrenia, Dentigloborotalia, Dentoglobigerina, Globoconella, Globoquadrina, Globorotalia, Globorotaloides, Neogloboquadrina, Pulleniatina,

Distinguishing features: Trocohspiral test with umbilically restricted aperture and one or more umbilical teeth

Daughter taxa: (blue => in age window 0-300Ma)

Specimens which cannot be assigned to established species

Taxonomy

Citation: Dentoglobigerina Blow 1979
Rank: genus
Type species: Globigerina galavisi Bermudez 1961
Taxonomic discussion: The genus Dentoglobigerina, as used here in the phylogenetic sense, includes the D. galavisi - D. globularis - D. altispira globulosa - D. altispira altispira lineage (Text Fig. 20). It includes morphotypes with umbilical teeth over an umbilically restricted aperture. Dentoglobigerina is morphologically intermediate between Globigerina and Globoquadrina. It resembles Globigerina by exhibiting an umbilically restricted aperture and Globoquadrina in possessing one or more umbilical teeth. The genus evolved in the late Oligocene and is largely confined to the Miocene. [Kennett & Srinivasan 1983]

Catalog entries: Dentoglobigerina;

Type images:

Distinguishing features: Trocohspiral test with umbilically restricted aperture and one or more umbilical teeth

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): in mid part of Piacenzian Stage (47% up, 3.1Ma, in Piacenzian stage). Data source: Total of range of species in this database
First occurrence (base): near top of Chattian Stage (91% up, 23.5Ma, in Chattian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.188

References:

Blow, W.H., (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea), 2. E. J. Brill, Leiden, 1413 pp.


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Dentoglobigerina compiled by the pforams@mikrotax project team viewed: 16-8-2018

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