Spongurus spatulaeformis


Classification: rads_cenozoic -> Spongodiscidae -> Sponguridae -> Spongurus -> Spongurus spatulaeformis
Sister taxa: S. bilobatus, S. cauleti, S. cylindricus, S. pylomaticus, S. quadratus, S. spatulaeformis, S. sp.,

Taxonomy

Citation: Spongurus spatulaeformis Clark & Campbell 1942
Rank: species
Basionym: Spongurus spatulaeformis
Notes & discussion: Clark and Campbell 1942

Catalog entries: Spongurus spatulaeformis

Original description: Shell generally cylindrical, nearly three times longer than wide, with two equal, equidistant, angular, spatulalike lobes at the opposite ends, the ventral region as long as both lobes, this region not swollen, the necks separating lobes and midregion very dense, the reticulum being of similar structure through the whole shell, bars of the meshes very thin.

Length, 200µm; breadth, 50µm; lobes, 50 by 50µm, necks, 40µm. Distinguishing characters (rw): Spongurus spatulaeformis n. sp. resembles S. bilobatus n. sp. but has differently shaped lobes, these being inadequately shown in the photograph which was taken at a focus that does. not emphasize them, less swollen midregion, coarser mesh, and relatively thicker necks, separating the lobes and midregion.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

References:

Clark, B. L. & Campbell, A. S. (1942). Eocene radiolarian faunas from the Mt. Diablo area, California. Geological Society of America, Special Papers. 39: 1-112. gs :: ::


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Spongurus spatulaeformis compiled by the radiolaria@mikrotax project team viewed: 31-5-2020

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Short stable page link: http://mikrotax.org/radiolaria/index.php?id=205556 Go to Archive.is to create a permanent copy of this page - citation notes



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