Octocyclus reinhardtii


Classification: ntax_mesozoic -> Podorhabdales -> Axopodorhabdaceae -> Octocyclus -> Octocyclus reinhardtii
Sister taxa: O. magnus, O. reinhardtii, O. sp.

Distinguishing features: Podorhabdid with central area spanned by eight bars that delineate eight large perforations that run either side of the longitudinal axis.


Taxonomy:

Citation: Octocyclus reinhardtii (Bukry, 1969) Wind & Wise in Wise & Wind, 1977
Rank: Species
Basionym: Podorhabdus reinhardtii Bukry, 1969

Farinacci & Howe catalog pages: P. reinhardtii *

Distinguishing features: Podorhabdid with central area spanned by eight bars that delineate eight large perforations that run either side of the longitudinal axis.


Morphology: Santonian holotype is a broken specimen and unclear. According to Wise & Wind (1977) this is a senior synonym of  O. magnus Black 1972, but the latter name is arguably useful for distinguishing particularly large, mid Cretaceous forms. Also in the Albian forms the crossbars are all of similar width whereas in the later forms, as in P. dietzmannii, the bar aligned with the short axis is significantly wider.

Search data:
TagsLITHS: placolith, ca_disjunct, grill, pores, process, CROSS-POLARS: rim-bicyclic, V-prominent,
MetricsLith size: 8->10µm;
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: At intermediate palaeolatitudes O. reinhardtii has its LO in the Turonian, zone UC9a, but it extends to the Maastrichtain at high paleolatitudes (Burnett 1998)
Last occurrence (top): within Late Maastrichtian Substage (66.04-69.91Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): within Albian Stage (100.50-112.95Ma, base in Albian stage). Data source: Burnett 1998

Plot of occurrence data:

References:

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

Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles. 51 (Protista 2): 1-79. gs V O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O

Crux, J. A. (1980). A biostratigraphical study of Upper Cretaceous nannofossils from South-east England and North France. PhD thesis, University College London. -. gs

Pospichal, J. J. & Wise, S. W. (1990b). Maestrichtian calcareous nannofossil biostratigraphy of Maud Rise ODP leg 113 sites 689 and 690, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 465-487. gs V O

Püttmann, T. & Mutterlose, J. (2019). Calcareous nannofossils from a Late Cretaceous nearshore setting. Journal of Nannoplankton Research. S4: 81-88. 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

Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs V O


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Octocyclus reinhardtii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-4-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10810 Go to Archive.is to create a permanent copy of this page - citation notes



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