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Species Archaeoglobigerina australis Huber 1990


Diagnosis / Definition:
Huber (1990):
Test biconvex, moderate to high spired, chambers strongly inflated, globular, final whorl chambers on adult specimens four to six,increasing moderately in size, adult apertures umbilical to slightly extraumbilical with a broad flap, surface composed of randomly situated pustules.
Discussion / Comments:
Huber (1990):
Etymology: From australis (latin), referring to the southern latitude region where it is found.
Diagnosis: Test biconvex, moderate to high spired, chambers strongly inflated, globular, final whorl chambers on adult specimens four to six,increasing moderately in size, adult apertures umbilical to slightly extraumbilical with a broad flap, surface composed of randomly situated pustules.
Description: Test coiled in a moderate to high spire, unequally biconvex,spiral side usually more convex than umbilical side, average diameter of adult specimens 280 µm, average breadth 150 µm. 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 chambers usually kummerform. Proloculus diameter of adult specimens averaging 16 µm, initial whorl diameter averaging 71 µm, 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
Van Eijden & Smit (1991):
Remarks. The presence of many forms intermediate with Rugoglobigerina pennyi Brönnimann, 1952a shows the close affinities of Archaeoglobigerina with Rugoglobigerina. We consider it to be the unornamented (high latitude?) equivalent of R. pennyi.
Synonym list:
Huber (1990):
1977 Hedbergella monmouthensis Olsson. - Sliter : p. 542 pl. 3, figs.1-3
1977 Rugoglobigerina pilula Belford. - Sliter : p. 542 pl. 120, figs. 7-9
1977 Rugoglobigerina rotundata Brönnimann. - Sliter : p. 543 pl. 11,figs. 1-3
1983 Hedbergella monmouthensis Olsson. - Krasheninnikov & Basov : p. 804-805 pl. 6, figs. 5-8
1983 Rugoglobigerina pilula Belford. - Krasheninnikov & Basov : p. 807 pl. 11, figs. 3-6.
1983 Rugoglobigerina pustulata Brönnimann. - Krasheninnikov & Basov : p. 806 pl. 10, figs. 10-13
1983 Rugoglobigerina rotundata Brönnimann. - Krasheninnikov & Basov : p. 807 pl. 11, figs. 7-11
1988 Rugoglobigerina rotundata Brönnimann. - Huber : p. 206 figs. 28.12-14
1990 Archaeoglobigerina n sp. australis Huber. - Huber : Pl. 2, Figs. 11-13, Pl. 3, Figs. 1-7; Pl. 6, Figs. 7-9
Van Eijden & Smit (1991):
1990 Archaeoglobigerina australis Huber. - Huber : pl. 2, figs. 11-13; pl. 3, figs. 1-7
1991 Archaeoglobigerina australis Huber. - Van Eijden & Smit : p.119 pl. 1, figs. 1-3
Specimen:
USNM, Inventory number: USNM 415772
USNM, Inventory number: USNM 415773
References:

Sliter,W.V. (1977):
Cretaceous foraminifers from the southwestern Atlantic Ocean, Leg 36, Deep Sea Drilling Project.
In: Initial Reports of the Deep Sea Drilling Project Vol. 36 Eds: Barker, P.F.Dalziel, E.W.D.Al, E. p. 519-573

Krasheninnikov,V.A. and Basov,I.A. (1983):
Cenozoic planktonic foraminifers of the Falkland Plateau and Argentine Basin, Deep Sea Drilling Projejt Leg 71.
In: Initial Reports of the Deep Sea Drilling Project Vol. 71 Eds: Ludwig, W.J.Krasheninninov, V.A. p. 821-845

Huber,B.T. (1988):
Upper Campanian-Paleocene foraminifera from the James Ross Island region (Antarctic Peninsula).
In: Geology and Paleontology of Seymour Island, Antarctica, Memoirs of the Geological Society of America Vol. 169 Eds: Feldmann, R.M..Woodburne, M.O.. p. 163-251

Huber,B.T. (1990):
Maestrichtian planktonic foraminifer biostratigraphy of the Maud Rise (Weddell Sea, Antarctica): ODP Leg 113 Holes 689B and 690C.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 113 Eds: Barker, P.F.Kennett, J.P.O'Connell, S.B.Pisias, N.G. p. 489-513

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123
Anonymous: Unedited TaxonConcept data
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