Nannotax3 - ntax_cenozoic - Neocrepidolithus dirimosus

Neocrepidolithus dirimosus

Classification: ntax_cenozoic -> Mesozoic Survivors -> Chiastozygaceae -> Neocrepidolithus -> Neocrepidolithus dirimosus
Sister taxa: N. cohenii, N. cruciatus, N. dirimosus, N. fossus, N. grandiculus, N. neocrassus, N. sp.

PN81fig2-12.JPG
PN81pl6-01.JPG
Varol1998_7-01-13.jpg

Taxonomy:

Citation: Neocrepidolithus dirimosus (Perch-Nielsen, 1979b) Perch-Nielsen, 1981

Rank: Species

Basionym: Crepidolithus dirimosus Perch-Nielsen, 1979b

Distinguishing features: Bicyclic Neocrepidolithus with closed central area.

Farinacci & Howe catalog pages: C. dirimosus *

Search data:

Tags	LITHS: murolith, elliptical, CA: closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Metrics	Lith size: 4->5µm; Data source notes: lith size very approx (need to check OD figs)

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

Geological Range:
Last occurrence (top): within NP5 zone (59.54-61.51Ma, top in Selandian stage). Data source: Perch-Nielsen 1985b
First occurrence (base): within NP2 zone (64.81-65.47Ma, base in Danian stage). Data source: Perch-Nielsen 1985

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: Neocrepidolithus dirimosus, synonyms included - Neocrepidolithus dirimosus;
See also space-time plot :: Samples map :: Parent: Neocrepidolithus

References:

Perch-Nielsen, K. (1979a). Calcareous nannofossil zonation at the Cretaceous/Tertiary boundary in Denmark. In, Birkelund, T. & Bromley, R. G. (eds) Proceedings Cretaceous-Tertiary Boundary Events Symposium, Copenhagen, 1. Copenhagen 115-135. gs

Perch-Nielsen, K. (1981b). New Maastrichtian and Paleocene calcareous nannofossils from Africa, Denmark, and USA and the Atlantic, and some Paleocene lineages. Eclogae Geologicae Helvetiae. 74(3): 831-863. gs V O

Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs

Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 200-224. gs

Neocrepidolithus dirimosus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 2-3-2021

Taxon Search:

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=933 Go to Archive.is to create a permanent copy of this page - citation notes

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