Hornibrookina weimerae


Classification: ntax_cenozoic -> Isochrysidales -> Prinsiaceae -> Hornibrookina -> Hornibrookina weimerae
Sister taxa: H. edwardsii, H. teuriensis ⟩⟨ H. arca, H. australis ⟩⟨ H. weimerae, H. apellanizii, H. sp.

Taxonomy:

Citation: Hornibrookina weimerae Self-Trail, 2011
Rank: Species

Distinguishing features: Small (2-3µm) species of Hornibrookina with somewhat rounded ends and a narrow central area filled by a central longitudinal bar. Individual transverse laths are impossible to discern with the light microscope. The proximal shield is relatively bright in XPL.

Farinacci & Howe catalog pages: H. weimerae *


Morphology: Hornibrookina weimerae most closely resembles H. teuriensis in being elongate oval with a relatively bright distal shield. However, it is much smaller, in both length and diameter, with a narrower central area (Self-Trail 2011)

Size: 2-0-2.6µm long, 1.2-1.7µm wide

Search data:
TagsLITHS: placolith, elliptical, CA: ca_disjunct, grill,
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 2->3µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP9A subzone (56.66-57.21Ma, top in Thanetian stage). Data source: Self-Trail 2011
First occurrence (base): within NP9A subzone (56.66-57.21Ma, base in Thanetian 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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Hornibrookina weimerae 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=739 Go to Archive.is to create a permanent copy of this page - citation notes



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