CATALOG OF ORIGINAL DESCRIPTIONS: Archaeoglobigerina australis Huber 1990

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 -> Archaeoglobigerina -> Archaeoglobigerina australis
Other pages this level: A. australis, A. blowi, A. bosquensis, A. mateola, A. subplana,

Archaeoglobigerina australis

Citation: Archaeoglobigerina australis Huber 1990
Rank: Species
Type locality: ODP Site 690, Maud Rise, Weddell Sea, ODP Sample 113-690C-19X-3, 113-123 cm
Type level: Maastrichtian
Holotype Repository: USNM
Holotype number: 415772

Linked specimens: USNM-415773 USNM-415772

Current identification/main database link: Archaeoglobigerina australis Huber 1990


Original Description
Test coiled in a moderate to high spire, unequally biconvex, spiral side usually more convex than umbilical side, average diameter of adult specimens 0.28 mm, average breadth 0.15 mm. Chambers strongly inflated, globular, increasing moderately in size with four to five and one-half in the penultimate whorl, increasing gradually in size with three and three-quarters to five and three-quarters in the ultimate whorl, 12 to 15 comprising the tests of adult specimens, final chamber usually kummerform. Proloculus diameter of adult specimens averaging 16 m, initial whorl diameter averaging 71 m, with a mean of 4.4 chambers in the initial whorl. Sutures moderately to strongly depressed, radial and straight on both the spiral and umbilical sides. Apertures of juvenile specimens extra-umbilical in position, having greater width than height, bordered by a narrow, thickened lip. Apertures of adult specimens umbilical to slightly extra-umbilical in position, often bordered by a broad flap that may completely extend across the umbilicus, with relict apertural flaps sometimes coalescing to form a pseudo-tegillum. Umbilicus deep, narrow to broad, comprising an average of 28% of the maximum test diameter. Test surface covered with fine to coarse, randomly situated pustules, surface of final chamber usually with finer pustulose ornament than previous chambers. Outer wall radial hyaline and finely perforate.

References:

Huber, B.T., (1990). Maestrichtian planktonic foraminifer biostratigraphy of the Maud Rise (Weddell Sea, Antarctica): ODP Leg 113 Holes 689B and 690C. Proceedings of the Ocean Drilling Program, Scientific Results, 113: 489-513.


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Archaeoglobigerina australis compiled by the pforams@mikrotax project team viewed: 17-12-2017

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