radiolaria - rads_cenozoic - Aspis murus

Aspis murus

Classification: rads_cenozoic -> Artostrobiidae -> Aspis -> Aspis murus
Sister taxa: A. murus, A. velutochlamydosaurus, A. sp.


Citation: Aspis murus Nishimura 1992
Rank: species
Basionym: Aspis murus

Catalog entries: Aspis murus

Original description: Shell of three (?) segments; cephalis quite irregularly shaped, very thick-walled, with rather large pores with polygonal pore-frames, fairly rough-surfaced and covered with many irregular short tubes (?) externally; internal cephalic skeletal elements invisible; it is uncertain whether the skeletal elements were broken or not present. Thorax cylindrical, slightly widening distally, thick-walled, penetrated by many circular pores with polygonal pore-frames regularly longitudinally arranged, becoming larger distally. Marked constriction at the lumbar stricture; abdomen (?) broken, not constricted, widely opened distally, rather thin-walled.

Based on 15 specimens. Overall height 125-155 µ, maximum width of thorax 64-70 µ and of cephalis 32-50 µ. Distinguishing characters (rw): This form is distinguished from Aspis velutochlamydosaurus as described under that species.




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:



Aspis murus compiled by the radiolaria@mikrotax project team viewed: 30-9-2022

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