Distinguishing features:
Parent taxon (Petrarhabdus): Prediscosphaera with massive, blocky spine covering most of the distal surface.
This taxon: Prediscosphaera with massive, four-part, blocky, square spine covering most of the distal surface.
Taxonomy:
Farinacci & Howe catalog pages: T. copulatus *
Distinguishing features:
Parent taxon (Petrarhabdus): Prediscosphaera with massive, blocky spine covering most of the distal surface.
This taxon: Prediscosphaera with massive, four-part, blocky, square spine covering most of the distal surface.
Search data:
LITHS: placolith, circular, quadrate, CA: cross-axial, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, V-prominent, |
Lith size: 7->10µm; Segments: 16->16; Data source notes: illustrated specimens |
Geological Range:
Last occurrence (top): in upper part of UC20a subzone (80% up, 69Ma, in Maastrichtian stage). Data source: Burnett 1998, fig 6.6
First occurrence (base): within Campanian Stage (72.05-83.64Ma, base in Campanian stage). Data source: Burnett 1998
Plot of occurrence data:
Burnett, J. A. (1997c). New species and new combinations of Cretaceous nannofossils and a note on the origin of Petrarhabdus (Deflandre) Wise & Wind. Journal of Nannoplankton Research. 19(2): 133-146. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O Deflandre, G. (1959). Sur les nannofossiles calcaires et leur systématique. Revue de Micropaléontologie. 2: 127-152. gs Varol, O. (1992). Taxonomic revision of the Polycyclolithaceae and its contribution to Cretaceous biostratigraphy. Newsletters on Stratigraphy. 27(93-127): -. 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 OReferences:
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Petrarhabdus copulatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-12-2023
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10890 Go to Archive.is to create a permanent copy of this page - citation notes |
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