Nannotax3 - ntax_mesozoic - Eprolithus apertior

Eprolithus apertior

Classification: ntax_mesozoic -> Braarudosphaerales -> Polycyclolithaceae -> Eprolithus -> Eprolithus apertior
Sister taxa: E. rarus, E. moratus, E. octopetalus, E. floralis, E. apertior, E. antiquus, E. sp.

Distinguishing features:
Parent taxon (Eprolithus): Moderately tall, circular to stellate, multiradiate nannoliths with 5-9 petaloid wall-cycle elements surrounding a wide central area spanned by a median diaphragm. Typically H-shaped in side view.
This taxon: Eprolithus with nine wall-elements and tall wall

Black1973-33-10.JPG
Black1973-33-9.JPG
Black1973-33-7.JPG
TypeFig Eprolithus apertior.jpg
Puttmann et al 2019 fig5 N.jpg
Burnett1998-6-13-02.jpg
Burnett1998-6-13-01.jpg

Taxonomy:

Citation: Eprolithus apertior Black, 1973

Rank: Species

Taxonomic discussion: Originally described as “resembling E. floralis very closely” (Black, 1973), and may represent a variant.

Farinacci & Howe catalog pages: E. apertior *

Morphology:

The wide central area is spanned by a diaphragm.

Size:

Most likely ancestor: Radiolithus orbiculatus - at confidence level 3 (out of 5). Data source: Varol 1992 (modified to include E. apertior).
Likely descendants: Eprolithus floralis; plot with descendants

Search data:

LITHS: nannolith-radiate, star-shaped, cylindrical, CA: closed, CROSS-POLARS: T-prominent,

Lith size: 4->8µm; Segments: 9->9;
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:
Notes: LAD is earlier at low latitudes - in UC7 (Burnett 1998)
Last occurrence (top): in upper part of UC9a subzone (70% up, 91Ma, in Turonian stage). Data source: Burnett 1998, fig. 6.3
First occurrence (base): in upper part of BC18 zone (75% up, 125.9Ma, in Aptian stage). Data source: Bown et al. 1998, fig. 5.3

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Eprolithus apertior, synonyms included - Eprolithus apertior;
See also space-time plot :: Samples map :: Parent: Eprolithus

References:

Black, M. (1973). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 2). Palaeontographical Society Monograph. 127: 49-112. gs

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs O

Püttmann, T., Mutterlose, J., Kaplan, U. & Scheer, U. (2019). Reworking of Cenomanian ammonites decoded by calcareous nannofossils (southern Münsterland Basin, northwest Germany). Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 291(1): 1-17. gs

Eprolithus apertior compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-9-2022

Taxon Search:

Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10433 Go to Archive.is to create a permanent copy of this page - citation notes

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information

1000

Notify me of new comments via email.

Remember my form inputs on this computer.