Petrarhabdus


Classification: Mesozoic -> Podorhabdales -> Prediscosphaeraceae -> Petrarhabdus
Sister taxa: Petrarhabdus, Prediscosphaera,

Distinguishing features: Prediscosphaera with massive, blocky spine covering most of the distal surface.


Daughter taxa: (blue => in age window 0-800Ma)
Prediscosphaera with massive, four-part, blocky, square spine covering most of the distal surface.

A species of Petrarhabdus in which the spine is significantly smaller than the coccolith. In the LM, the image is very highly birefringent.  In the SEM, the spine appears to be composed of three stacks of calcite blocks,


Specimens not identified to species level

Taxonomy:

Citation: Petrarhabdus (Deflandre, 1959) Wind & Wise in Wise, 1983
Rank: Genus
Type species: Petrarhabdus copulatus (Deflandre, 1959) Wind & Wise in Wise, 1983

Farinacci & Howe catalog pages: Petrarhabdus *

Distinguishing features: Prediscosphaera with massive, blocky spine covering most of the distal surface.

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Cenomanian Stage (0% up, 100.5Ma, in Cenomanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

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

Deflandre, G. (1959). Sur les nannofossiles calcaires et leur systématique. Revue de Micropaléontologie. 2: 127-152. gs

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


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Petrarhabdus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-10-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10889 Go to Archive.is to create a permanent copy of this page - citation notes



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