Nannotax3 - ntax_cenozoic

Gomphiolithus

Classification: ntax_cenozoic -> Discoasterales -> Fasciculithaceae -> Gomphiolithus
Sister taxa: Diantholitha, Fasciculithus, Gomphiolithus, Lithoptychius

Daughter taxa (time control age-window is: 0-800Ma)
				Gomphiolithus magnicordis Medium-sized species (H ca 7 µm, W ca 9 µm) with flat cylindrical outline, consisting of 20 to 30 wedges with a smooth outer surface and a large and deep distal depression with central body.
				Gomphiolithus magnus Large, cylindrical fasciculith that narrows sharply around half way up the column, forming a shoulder.

Taxonomy:

Citation: Gomphiolithus Aubry in Aubry et al. 2011

Rank: Genus

Type species: Fasciculithus magnus Bukry & Percival 1971

Distinguishing features: Fasciculiths formed of a single cycle, arguably with central body, deep cavity on one side, no fenestrae

Farinacci & Howe catalog pages: Gomphiolithus *

Phylogenetic relations: These are the ancestral fasciculiths according to Romein (1979) and separating them, as reccomended by Aubry et al. (2011), makes sense phylogenetically, if Fascilulithus (sensu stricto) evolved from Lithoptychius rather than from Gompholithus.

Search data:

Tags	LITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: R-prominent,
Metrics	Lith size: 6->10µm;

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

Geological Range:
Notes: Romein (1979), Perch-Nielsen (1985), Steurbaut & Sztrakos (2008), & Monechi et al. (2013) all give these species a similar restricted range in lower NP4
Last occurrence (top): in upper part of Danian Stage (75% up, 62.7Ma, in Danian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Danian Stage (69% up, 63Ma, in Danian stage). Data source: Total of range 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: Fasciculithaceae

References:

Aubry, M. P., Bord, D. & Rodriguez, O. (2011). New taxa of the Order Discoasterales Hay 1977. Micropaleontology. 57(3): 269-287. gs

Romein, A. J. T. (1979). Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletin. 22: 1-231. gs V O

Gomphiolithus 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=629 Go to Archive.is to create a permanent copy of this page - citation notes

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