Distinguishing features:
Parent taxon (Lithastrinus): Eprolithids with two cycles of five to seven ray-like, curved, wall-cycle elements surrounding a narrow median diaphragm.
This taxon: Lithastrinus with five petaloid wall-elements
Taxonomy:
Farinacci & Howe catalog pages: L. pentabrachius *
Distinguishing features:
Parent taxon (Lithastrinus): Eprolithids with two cycles of five to seven ray-like, curved, wall-cycle elements surrounding a narrow median diaphragm.
This taxon: Lithastrinus with five petaloid wall-elements
Most likely ancestor: Lithastrinus grillii - at confidence level 3 (out of 5). Data source: Varol 1992.
Likely descendants: Lithastrinus quadricuspis;
plot with descendants
LITHS: nannolith-radiate, pentagonal, star-shaped, CA: closed, CROSS-POLARS: T-prominent, |
Lith size: 5->15µm; Segments: 5->5; Data source notes: original description |
Geological Range:
Last occurrence (top): within Campanian Stage (72.17-83.65Ma, top in Campanian stage). Data source: Varol, 1992 (original description)
First occurrence (base): within Campanian Stage (72.17-83.65Ma, base in Campanian stage). Data source: Varol, 1992 (original description)
Plot of occurrence data:
Varol, O. (1992). Taxonomic revision of the Polycyclolithaceae and its contribution to Cretaceous biostratigraphy. Newsletters on Stratigraphy. 27(93-127): -. gsReferences:
Lithastrinus pentabrachius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-9-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10571 Go to Archive.is to create a permanent copy of this page - citation notes |
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