Acadialithus dennei

Distinguishing features:
Parent taxon (Acadialithus): Squat tube-shaped nannoliths; wall formed of two vertically stacked cycles, with 6-7 elements per cycle; wide central opening; c-axes oblique
This taxon: Acadialithus with 6 elements in each wall cycle

Taxonomy:

Farinacci & Howe catalog pages: A. dennei *

Distinguishing features:
Parent taxon (Acadialithus): Squat tube-shaped nannoliths; wall formed of two vertically stacked cycles, with 6-7 elements per cycle; wide central opening; c-axes oblique
This taxon: Acadialithus with 6 elements in each wall cycle

Geological Range:
Notes: Valentine (1980) recorded both A. dennei and A. valentinei n. sp. as a “common constituent” (Valentine, 1980, p. 74) from samples (12,700 to 13,240’) that he regarded as Berriasian. This interval also contains Polycostella senaria, so it is here regarded as Upper Tithonian. Unfortunately, Valentine (1980) did not present a detailed distribution chart for the COST B-3 well. Sinnyovsky (2005) records both A. dennei and A. valentinei n. sp. as common from sample Be 263, near the top of the Upper Tithonian. [Howe 2017]
Last occurrence (top): within Late Tithonian Substage (145.01-147.72Ma, top in Tithonian stage). Data source: Howe 2017
First occurrence (base): within Late Tithonian Substage (145.01-147.72Ma, base in Tithonian stage). Data source: Howe 2017

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Acadialithus

Acadialithus dennei compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-9-2023 Taxon Search: Advanced Search Short stables page link: https://mikrotax.org/Nannotax3/index.php?id=10003 Go to Archive.is to create a permanent copy of this page - citation notes

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