Catalog - Archaeoguembelitria Catalog - Archaeoguembelitria

CATALOG OF ORIGINAL DESCRIPTIONS: Archaeoguembelitria Georgescu 2009

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: pf_cat -> A -> Archaeoguembelitria
Other pages this level: Abathomphaloidea, Abathomphalus, Acarinina, Alanlordella, Alicantina, Alloglobigerinoides, Anaticinella, Anomalina, Archaeoglobigerina, Archaeoglobitruncana, Archaeoguembelitria, Aristerospira, Ascoliella, Astrorotalia, Asymetria


Citation: Archaeoguembelitria Georgescu 2009
taxonomic rank: Genus
Type species: Guembelitria harrisi Tappan, 1940, p. 115, pl. 19, fig. 2.
Type age (chronostrat): Upper Albian to lowermost Turonian (from the P. ticinensis Biozone throughout the lower part of the W. archaeocretacea Biozone).
Type locality: Cosmopolitan.

Current identification:

Original Description

Diagnosis.–  Test triserial with chamber surface exhibiting the transition from completely smooth to pore mounds.

Description.– Test triserial throughout, twisted or not. Chambers are globular and increase gradually in size as added. Sutures are distinct and depressed. Aperture is umbilical in position, large, a high arch situated at the base of the last formed chamber. A thin and delicate lip borders the aperture. Chamber surface is smooth in the earlier species and with pore mounds in the evolved ones. Test wall is calcitic, hyaline, microperforate.

The prefix “archaeo-“ (ancient, old) is added to the pre-existent genus name Guembelitria.

Extra details from original publication
Remarks.– Archaeoguembelitria  is proposed for a lineage of upper Albian to lowermost Turonian age, which consists of triserial foraminifera and were previously included within Guembelitria (Fig. 2). The test surface shows grad- ual transition between the earlier, smooth A. cenomana (Keller, 1935) and the evolved species, which bears pore mounds on the test surface, namely A. harrisi (Tappan, 1940). This sequence in the development of test ornamentation from smooth to pore mounds is relatively similar to the  late  Santonian-earliest Paleocene   Guembelitria, namely G. sp. (smooth surface)-G. turrita (pustulose)-G. cretacea (pore mounds).

Editors' Notes
Georgescu (2009a) described two new species of this new genus, one benthic (Archaeoguembelitria cenomana), and one planktonic (Archaeoguembelitria harrisi)


Georgescu, M. D. (2009a). On the origins of Superfamily Heterohelicacea Cushman, 1927 and the polyphyletic nature of planktic foraminifera. Revista Española de Micropaleontología. 41: 107-144. gs


Archaeoguembelitria compiled by the pforams@mikrotax project team viewed: 26-2-2024

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