Daktylethra basilica


Classification: ntax_cenozoic -> Holococcoliths -> fossil holococcoliths -> Daktylethra -> Daktylethra basilica
Sister taxa: D. punctulata, D. probertii, D. unitatis, D. basilica, D. sp.

Taxonomy:

Citation: Daktylethra basilica Self-Trail, 2011
Rank: Species
Taxonomic discussion: Possibly a more heavily calcified variant of D. unitatis

Distinguishing features: Cavate with thin basal plate and thick flaring walls extending to one-third the height of the specimen; domed distal cover showing perforations. The basal plate, walls and dome are crystallographically continuous and bright at 45° in XPL, darkening slightly when rotated to 0°. The central cavate opening is almost circular in side view.

Farinacci & Howe catalog pages: D. basilica *


Morphology: Daktylethra basilica differs from D. unitatus (also from Zone NP 16) in having a thicker walls that extends away from the central dome and in having an almost perfectly circular central cavity. NB DEscrition of Self-Trail (2011) slightly edited to conform better with terminlogy used here to describe the other species of Daktylethra.

Search data:
TagsLITHS: holococcolith, elliptical, hollow, CA: pores, closed, CROSS-POLARS: 1ou, V-prominent,
MetricsLith size: 3->5µm;
Data source notes: lith size from OD
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: Self-Trail 2011
First occurrence (base): within NP16 zone (40.40-42.87Ma, base in Lutetian stage). Data source: Self-Trail 2011

Plot of occurrence data:

References:

Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs V O


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Daktylethra basilica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=427 Go to Archive.is to create a permanent copy of this page - citation notes



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