Nannotax3 - ntax_cenozoic - Micrantholithus angulosus

Micrantholithus angulosus

Classification: ntax_cenozoic -> Braarudosphaerales -> Braarudosphaeraceae -> Micrantholithus -> Micrantholithus angulosus
Sister taxa: M. breviradiatus, M. disculus, M. flos ⟩⟨ M. astrum, M. entaster, M. excelsus, M. hebecuspis, M. minimus, M. pinguis, M. vesper ⟩⟨ M. attenuatus, M. mirabilis ⟩⟨ M. angulosus, M. bramlettei, M. bulbosus, M. crenulatus, M. tinus, M. sp.

Bybell 1975 pl09 01.JPG
Bybell 1975 pl09 04.JPG
CalcPal-mangul.jpg
Bybell 1975 pl09 02.JPG
Bybell 1975 pl09 03.JPG
Bybell Gartner 72pl2-11.JPG
Bybell Gartner 72pl2-12.JPG
Bybell Gartner 72pl2-13.JPG
Bybell Gartner 72pl2-14.JPG

Taxonomy:

Citation: Micrantholithus angulosus Stradner & Papp 1961

Rank: Species

Basionym: Micrantholithus flos angulosus Stradner 1959

Distinguishing features:
Parent taxon (Micrantholithus): Pentaliths with sutures emerging through corners; edge often indented giving stellate outline
This taxon: Arms end in a trilobate termination. most specimens thin with narrow arms.

Farinacci & Howe catalog pages: M. angulosus [no catalog entry yet]

Search data:

Tags	LITHS: nannolith-radiate, pentagonal, star-shaped, CROSS-POLARS: T-prominent,
Metrics	Lith size: 9->13µm; Segments: 5->5; Liths per sphere: 12->12 Data source notes: lith size (diameter) from OD & illustrated specimens; lith numbers assumed from geometry

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Late Eocene Sub-Epoch (33.89-37.75Ma, top in Priabonian stage). Data source: Bybell & Gartner 1972
First occurrence (base): within Middle Eocene Sub-Epoch (37.75-47.84Ma, base in Lutetian stage). Data source: Bybell & Gartner 1972

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
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Micrantholithus

References:

Bybell, L. M. & Gartner, S. (1972). Provincialism among mid-Eocene calcareous nannofossils. Micropaleontology. 18(319-336): -. gs

Bybell, L. (1975). Middle Eocene calcareous nannofossils at Little Stave Creek, Alabama. Tulane Studies in Geology and Paleontology. 11(4): 177-247. gs V O

Stradner, H. & Papp, A. (1961). Tertiäre Discoasteriden aus Österreich und deren stratigraphische Bedeutung mit Hinweisen auf Mexico, Rumanien und Italien. Jahrbuch der Geologischen Bundesanstalt, Sonderband. 7: 1-159. gs V O

Micrantholithus angulosus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2021

Taxon Search:

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=856 Go to Archive.is to create a permanent copy of this page - citation notes

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