arrayname: original 

Eprolithus

Distinguishing features:
Parent taxon (Polycyclolithaceae): Nannoliths composed of two superposed wall cycles and a central-area which may be closed, open and vacant, or spanned by a diaphragm-like structure. Elements have tangential c-axis orientation.
This taxon: 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.

Daughter taxa (time control age-window is: 0-800Ma)
				Eprolithus rarus Eprolithus with six wall-elements.
				Eprolithus moratus Eprolithus with seven wall-elements
				Eprolithus octopetalus Eprolithus with eight wall-elements.
				Eprolithus floralis Eprolithus with nine wall-elements.
				Eprolithus apertior Eprolithus with nine wall-elements and tall wall
				Eprolithus antiquus Circular eprolithid nannolith with narrow wall, wide diaphragm and relatively large central perforation.
				Eprolithus sp. Specimens not identified to species level

Taxonomy:

Farinacci & Howe catalog pages: Eprolithus * , Polycyclolithus + *

Distinguishing features:
Parent taxon (Polycyclolithaceae): Nannoliths composed of two superposed wall cycles and a central-area which may be closed, open and vacant, or spanned by a diaphragm-like structure. Elements have tangential c-axis orientation.
This taxon: 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.

Geological Range:
Last occurrence (top): at top of Campanian Stage (100% up, 72.2Ma, in Campanian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within BC7 zone (131.54-132.40Ma, base in Hauterivian stage). Data source: Total of ranges of species in this database

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
• Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Polycyclolithaceae

Eprolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-4-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10431 Go to Archive.is to create a permanent copy of this page - citation notes

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