Euchitonia


Classification: rads_cenozoic -> Spongodiscidae -> Spongodiscidae inc sed -> Euchitonia
Sister taxa: Amphirhopalum, Coccolarcus, Euchitonia, Ommatogramma, Plectodiscus, Porodiscus, Spongasteriscus, Spongobrachium, Stylospongia, Tholodiscus, Trigonastrum
Daughter taxa: (blue => in age window 0-800Ma) Granddaughter taxa
Euchitonia elegans

neptune records:

Euchitonia sp.

neptune records: 35

Taxonomy

Citation: Euchitonia Ehrenberg 1861
Rank: genus
Basionym: Euchitonia

Catalog entries: Euchitonia

Original description: Polycystinum compositum e Calodictyis. Testula silicea plana spongioso-cellulosa, lobato-stellata. Cellulae disci spongiaceae concentricae. Membrana cellulosa radios ad apices usque coniungens.

Ab affini Histiastro fossili Antillarum membrana totos radios involvente differt, quae in illo prope discum solummodo observatur. Praeterea aculei validi Histiastri triactidis et quaternarii radios terminant, quae in Euchitonia desiderantur.


Translated description: Composite polycystin of the Calodictya. Small test, siliceous, flat, spongy-porous, lobate-stellate. Pores of the spongy disc concentric. A porous membrane connects the radii all the way to their apices.

Differs from the related fossil Histiastrum from the Antilles, which has a membrane only near the disc, in having a membrane surrounding all the radii. Besides, the radii of Histiastrum triactis and H. quaternaria terminate in strong spines, which are lacking in Euchitonia. (Translated from Latin by E.M.R. and W.R.R.)]
Remarks on original description: [Euchitonia Ehrenberg, 1860a [775:767] is a Nomen Nudum]

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of Piacenzian Stage (100% up, 2.6Ma, in Piacenzian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aquitanian Stage (0% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Ehrenberg, C. G. (1861c). Uber den Tiefgrund des stillen Oceans zwischen Californien und den Sandwich-Inseln aus bis 15600' Tiefe nach Lieut. Brooke. Monatsberichte der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1860: 819-834. gs


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Euchitonia compiled by the radiolaria@mikrotax project team viewed: 24-11-2020

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Short stable page link: http://mikrotax.org/radiolaria/index.php?id=204052 Go to Archive.is to create a permanent copy of this page - citation notes



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