Podorhabdus grassei


Classification: Mesozoic -> Podorhabdales -> Axopodorhabdaceae -> Podorhabdus -> Podorhabdus grassei
Sister taxa: P. grassei, P. sp.

Distinguishing features: Broadly elliptical to subcircular podorhabdid with central area spanned by a granular bar supporting a broad, tall, hollow, flaring spine.


Taxonomy:

Citation: Podorhabdus grassei Noël, 1965
Rank: Species
Synonyms:
Variants: Hemipodorhabdus conjugatus Medd 1979 - smaller

Farinacci & Howe catalog pages: P. grassei + * , D. jungi * , D. biperforatus * , H. conjugatus *

Distinguishing features: Broadly elliptical to subcircular podorhabdid with central area spanned by a granular bar supporting a broad, tall, hollow, flaring spine.

Search data:
TagsLITHS: placolith, circular, elliptical, CA: ca_disjunct, process, bar, closed, CROSS-POLARS: rim-bicyclic, V-prominent,
MetricsLith size: 4->8µm;
Data source notes: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: May range as high as Berriasian in the Pacific ocean (Subzone NK2a) (see Bown, 2005).
Last occurrence (top): within NJ17a subzone (149.09-151.50Ma, top in Tithonian stage). Data source: Bown & Cooper 1998
First occurrence (base): in upper part of NJ8b subzone (70% up, 170.6Ma, in Aalenian stage). Data source: Bown & Cooper 1998 (fig. 4) - secondary events

Plot of occurrence data:

References:

Barnard, T. & Hay, W. W. (1974). On Jurassic coccoliths: A tentative zonation of the Jurassic of Southern England and North France. Eclogae Geologicae Helvetiae. 67(3): 563-585. gs V O

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. 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 V O

Grün, W. & Zweili, F. (1980). Das kalkige Nannoplankton der Dogger-Malm-Grenze im Berner Jura bei Liesberg (Schweiz). Jahrbuch der Geologischen Bundesanstalt. 123: 231-341. gs V O

Medd, A. W. (1979). The Upper Jurassic coccoliths from the Haddenham and Gamlingay boreholes (Cambridgeshire, England). Eclogae Geologicae Helvetiae. 72: 19-109. gs V O

Noël, D. (1965b). Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Éditions du Centre National de la Recherche Scientifique, Paris. 1-209. gs

Perch-Nielsen, K. (1984b). Validation of new combinations. INA Newsletter. 6(1): 42-46. gs V O

Rood, A. P., Hay, W. W. & Barnard, T. (1971). Electron Microscope Studies of Oxford Clay Coccoliths. Eclogae Geologicae Helvetiae. 64: 245-272. gs V O

Rood, A. P., Hay, W. W. & Barnard, T. (1973). Electron microscope studies of Lower and Middle Jurassic coccoliths. Eclogae Geologicae Helvetiae. 66: 365-382. gs V O

Wise, S. W. & Wind, F. H. (1977). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project. 36(269-491): -. gs V O


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Podorhabdus grassei compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-10-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10921 Go to Archive.is to create a permanent copy of this page - citation notes



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