Neosemantis cladophora


Classification: rads_cenozoic -> Trissocyclidae -> Stephaniidae -> Neosemantis -> Neosemantis cladophora
Sister taxa: N. bjoerklundi, N. cladophora, N. distephanus, N. hofferti, N. sp.

Taxonomy

Citation: Neosemantis cladophora (Jørgensen 1905) Goll 1979
Rank: species
Basionym: Neosemantis cladophora

Catalog entries: Campylacantha cladophora

Original description: The sagittal, basal spine is best developed, very strong, long, strongly bent, gradually narrowing off into a long fine point, like all the stronger main spines and branches three-edged. One edge is dorsal, the others lateral. On these three edges, there are strong, expanded, narrow pointed branches, several in a row along the same edge, rather scattered and not clearly forming verticils when compared to the branches on the other edges. The branches become shorter towards the end of the main spines. The larger branches are in their turn furnished with similar squarrose branches. The basal, lateral spines are also strongly developed, although not quite so much so as the sagittal, dorsal one, in other respects corresponding precisely in form and arrangement of branches. The apical spine is much less developed, having only a verticil of three branches on the corresponding place to the verticil of Plagiacantha, outside this being thin and unbranched.
The ventral, sagittal spine is thin and unbranched, almost straight, pointing obliquely downwards between the lateral spines and being somewhat shorter than these. In addition, in well developed forms, there appears to be two strong, lateral arched branches extending from the basal, dorsal spine at the base of the apical spine. These arched branches form a pair of secondary, lateral spines, lr and ll, in form and arrangement of branches corresponding to the primary, lateral spines, only less developed. In those individuals where a smaller numbers of secondary spines were developed, they were not visible. But it must be remarked that the species is very brittle, so that the branches are easily broken off. Distinguishing characters (rw): Rare, always in small numbers, only in deep water samples.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:

References:


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Neosemantis cladophora compiled by the radiolaria@mikrotax project team viewed: 26-11-2020

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Short stable page link: http://mikrotax.org/radiolaria/index.php?id=204729 Go to Archive.is to create a permanent copy of this page - citation notes



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