Bilapillus wadeae

Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Bilapillus -> Bilapillus wadeae
Sister taxa: B. wadeae, B. sp.


Citation: Bilapillus wadeae Lees, 2007
Rank: Species

Farinacci & Howe catalog pages: B. wadeae * , B. phenax *

Morphology: Simlar to Lucianorhabdus compactus but smaller. "A small species of Bilapillus. The illustrations in Pl.13, figs 44, 45 appear to show perforations in the central blocks." [Lees 2007]

Size: 2.5-4µm long (Blair & Watkins, 2009); Holotype dimensions: L = 3.30μm, W = 2.20μm.

Search data:
TagsLITHS: holococcolith, elliptical, CA: pores, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
MetricsLith size: 2->4µm; Segments: 2->2;
Data source notes: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Santonian Stage (83.64-86.26Ma, top in Santonian stage). Data source: Blair & Watkins (2009)
First occurrence (base): within Cenomanian Stage (93.90-100.50Ma, base in Cenomanian stage). Data source: Lees 2007 (original description)

Plot of occurrence data:


Blair, S. A. & Watkins, D. K. (2009). High-resolution calcareous nannofossil biostratigraphy for the Coniacian/Santonian Stage boundary, Western Interior Basin. Cretaceous Research. 30(2): 367-384. gs

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 V O

Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs V O


Bilapillus wadeae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-1-2021

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