Taxonomy:
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.
Tags | LITHS: holococcolith, elliptical, CA: pores, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 2->4µm; Segments: 2->2; Data source notes: original description & illustrated specimens |
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 OReferences:
![]() |
Bilapillus wadeae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-1-2021
Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10064 Go to Archive.is to create a permanent copy of this page - citation notes |