References:
Sullivan, F. R. (1965). Lower Tertiary nannoplankton from the California Coast Ranges. II. Eocene. University of California Publications in Geological Sciences. 53: 1-74. gs
Taxonomy:
Distinguishing features: Braarudosphaera with ridge along the longer edge of each segment, giving rotated stellate appearance.
Farinacci & Howe catalog pages: B. perversus *
Search data:| Tags | LITHS: nannolith-radiate, pentagonal, CROSS-POLARS: T-prominent, |
| Metrics | Lith size: 12->18µm; Segments: 5->5; Coccosphere size: 24->36µm; Liths per sphere: 12->12 Data source notes: lith size (diameter) from OD; lith numbers assumed from geometry; csph size calculated from lith size |
Geological Range:
Last occurrence (top): within NP12 zone (50.50-53.70Ma, top in Ypresian stage). Data source: original publication - recorded as from Penutian Stage in California which roughly corresponds to nannofossil stage NP12 according to GeoWhen database
First occurrence (base): within NP12 zone (50.50-53.70Ma, base in Ypresian stage). Data source: original publication - recorded as from Penutian Stage in California which roughly corresponds to nannofossil stage NP12 according to GeoWhen database
Plot of occurrence data:
Sullivan, F. R. (1965). Lower Tertiary nannoplankton from the California Coast Ranges. II. Eocene. University of California Publications in Geological Sciences. 53: 1-74. gsReferences:
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Braarudosphaera perversus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-2-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=151 Go to Archive.is to create a permanent copy of this page - citation notes |