Planorotalites australiformis Jenkins 1966 from: Van Eijden, A.J.M.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 . |
Notice: This catalogue page may contain unedited data.
|
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):
Jenkins (1985):
Van Eijden & Smit (1991):
|
Was used in synonym list of: |
|
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
|
This work is licensed under a Creative Commons Attribution 2.5 License.
|
|