Gardin et al 2012 f6G-H.JPG
Gardin et al 2012 f6GH.jpg
Gardin et al 2012 f6G-H.JPG
Gardin et al 2012 f6GH.jpgTaxonomy:
Thoracosphaera geometrica (Jafar, 1983) Bown 1987
Archaeopontosphaera primitiva Jafar [cf. Bralower et al. - "the holotype of A. primitiva (Jafar, 1983, fig. 11. I ) appears to be a flattened specimen of T. geometrica"]
Farinacci & Howe catalog pages: P. geometrica * , A. primitiva *
Size: 3-9 µm (Bralower et al. 1991)
| Tags | LITHS: |
| Metrics | Lith size: 0->0µm; |
Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: Total of range of species in this database
Plot of occurrence data:
Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 1-118. gs Bown, P. R. (1998b). Triassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 29-33. gs Bralower, T. J., Bown, P. R. & Siesser, W. (1991). Significance of Upper Triassic nannofossils from the Southern Hemisphere (ODP Leg 122, Wombat Plateau, NW Australia). Marine Micropaleontology. 17: 119-154. gs Gardin, S., Krystyn, L., Richoz, S., Bartolini, A. & Galbrun, B. (2012). Where and when the earliest coccolithophores? Lethaia. 45: 507-523. gs Jafar, A. S. (1983). Significance of Late Triassic calcareous nannoplankton from Austria and Southern Germany. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 166: 218-259. gs Janofske, D. (1987). Kalkige Nannofossilien aus der Ober-Trias (Rhat) der Nordlichen Kalkalpen. Berliner Geowissenschaftliche Abhandlungen. 86: 45-67. gs V O Moshkovitz, S. (1982). On the findings of a new calcareous nannofossil (Conusphaera zlambachensis) and other calcareous organisms in the Upper Triassic sediments of Austria. Eclogae Geologicae Helvetiae. 75: 611-619. gs V OReferences:
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Orthopithonella geometrica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-4-2021
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