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Species Planorotalites australiformis Jenkins 1966


Diagnosis / Definition:
Tjalsma (1977):
P. australiformis was reported from New Zealand to replace P. pseudomenardii in the upper Paleocene and to range well into the lower Eocene. At Site 329 it occurs frequently from the top of Section 3, Core 33 to the top of Core 32.
Discussion / Comments:
Tjalsma (1977):
P. australiformis was reported from New Zealand to replace P. pseudomenardii in the upper Paleocene and to range well into the lower Eocene. At Site 329 it occurs frequently from the top of Section 3, Core 33 to the top of Core 32.
Jenkins (1985):
The small test (holotype 0.26 mm) with 4 chambers in the final whorl distinguishes P. australiformis from other species of the genus. It has been recorded in New Zealand and on DSDP Leg 29 from the Paleocene Globigerina triloculinoides Zone into the Middle Eocene Acarinina primitiva Zone (Jenkins, 1966a, 1975). It also occurs in the equivalent of the Acarinina primitiva Zone in South Australia (Ludbrook & Lindsay, 1969).
Van Eijden & Smit (1991):
Remarks. This species (probably a variant of P. planoconica (Subbotina, 1953)) is conspicuously present in the 125-250-ìm fraction of Sample 121-752A-13X-3, 110-115 cm, of early middle Eocene age.
Systematics:

32
 Familia Globorotaliidae
  Genus Planorotalites
   Species Planorotalites australiformis
Synonym list:
Tjalsma (1977):
1965 Globorotalia australiformis Jenkins. - Jenkins : p.112 fig. 11, nos.92-96
1977 Planorotalites australiformis Jenkins. - Tjalsma : p.507 pl. 2, figs. 7-10
Jenkins (1985):
1966 Globorotalia australiformis Jenkins. - Jenkins : p.112 fig. 11, nos. 92-96
1985 Planorotalites australiformis Jenkins. - Jenkins : p.273 figs. 6.8; 5
Van Eijden & Smit (1991):
1966 Globorotalia australiformis Jenkins. - Jenkins : 1112-1113 fig. 11, nos. 92-96
1991 Planorotalites australiformis Jenkins. - Van Eijden & Smit : p.123 po. 5, figs. 9-10
Was used in synonym list of:
Globanomalina australiformis Jenkins 1966
References:

Jenkins,D.G. (1965):
Planktonic foraminiferal zones and new taxa from the Danian to lower Miocene of New Zealand . New Zealand Journal of Geology and Geophysics Vol. 8(6) p. 1088-1288

Jenkins,D.G. (1966):
Planktonic foraminiferal zones and new taxa from the Danian to lower Miocene of New Zealand. . N. Z. J. Geol. Geophys. Vol. 8 p. 1088-1126

Tjalsma,R.C. (1977):
Cenozoic Foraminifera from the South Atlantic, DSDP Leg 36.
In: Initial Reports of the Deep Sea Drilling Project Vol. 36 p. 493-518

Jenkins,D.G. (1985):
Southern mid-latitude Paleocene to Holocene planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 263-282

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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