Distinguishing features:
Parent taxon (Pocillithus): Minute muroliths with prominent spine, rim non-imbricate typically with serrated distal margin.
This taxon: rim low with smooth distal margin; central area spanned by cross-bars
Taxonomy:
Farinacci & Howe catalog pages: P. crucifer *
Distinguishing features:
Parent taxon (Pocillithus): Minute muroliths with prominent spine, rim non-imbricate typically with serrated distal margin.
This taxon: rim low with smooth distal margin; central area spanned by cross-bars
Morphology:
Differentiation. Pocillithus spinulifer has a central cross that forms a square spine-base, and the spine is square in cross-section; P. macleodii has a proximal plate that supports the spine, and no cross.
Size:
LITHS: murolith, circular, elliptical, cylindrical, CA: diagonal cross, process, |
Lith size: 0.5->1.5µm; Data source notes: holotype +/-0.5µm |
Geological Range:
Last occurrence (top): within Turonian Stage (89.39-93.90Ma, top in Turonian stage). Data source: Bown et al. 2017
First occurrence (base): within Turonian Stage (89.39-93.90Ma, base in Turonian stage). Data source: Bown et al. 2017
Plot of occurrence data:
Bown, P. R., Lees, J. A. & Young, J. R. (2017). On the Cretaceous origin of the Order Syracosphaerales and the genus Syracosphaera. Journal of Micropalaeontology. 36(2): 153-165. gs References:
Pocillithus crucifer compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-12-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10915 Go to Archive.is to create a permanent copy of this page - citation notes |
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