Nannotax3 - ntax_main - Tetrapodorhabdus coptensis

Citation: Tetrapodorhabdus coptensis Black, 1971

Synonyms:

Hemipodorhabdus biforatus Black 1972 [cf Grun & Allemann 1975, NB they did not include all specimens figured by Black in their concept of T. coptensis but did include the holotype]
Tetrapodorhabdus hunmanbiensis Black (1971) [my interpretation - JRY 2015]

Taxonomic discussion: Poorly differentiated from T. decorus and arguably a junior synonym of it - but often recorded in the Early Cretaceous whereas T. decorus is mostly recorded from the Late Cretaceous.

Distinguishing features:
Parent taxon (Tetrapodorhabdus): Elliptical; central area with diagonal cross or offset crossbars bars, supporting hollow spine
This taxon: Podorhabdids with central area spanned by diagonal cross bars.

Geological Range:
Last occurrence (top): within Late Maastrichtian Substage (66.04-70.10Ma, top in Maastrichtian stage). Data source: Bown et al. 1998
First occurrence (base): within Berriasian Stage (137.70-143.10Ma, base in Berriasian stage). Data source: Bown et al. 1998

References:

Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs

Black, M. (1972a). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 1). Palaeontographical Society Monograph. 126: 1-48. gs

Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-82. gs O

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

Crux, J. A. (1989). Biostratigraphy and palaeogeographical applications of Lower Cretaceous nannofossils from north-western Europe. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series . 143-211. gs

de Kaenel, E. & Bergen, J. A. (1996b). Mesozoic calcareous nannofossil biostratigraphy from sites 897, 899, and 901, Iberia Abyssal Plain: New biostratigraphic evidence. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 27-59. gs O

Grün, W. & Allemann, F. (1975). The Lower Cretaceous of Caravaca (Spain): Berriasian Calcareous Nannoplankton of the Miravetes Section (Subbetic Zone, Prov. of Murcia). Eclogae Geologicae Helvetiae. 68: 147-211. gs O

Varol, O. & Girgis, M. (1994). New taxa and taxonomy of some Jurassic to Cretaceous calcareous nannofossils. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 192: 221-253. gs

Tetrapodorhabdus coptensis

References:

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