radiolaria - rads_cenozoic - Larcopyle hayesi irregularis radiolaria - rads_cenozoic - Larcopyle hayesi irregularis

Larcopyle hayesi irregularis

Classification: rads_cenozoic -> Pyloniidae -> Larcopyle -> Larcopyle hayesi -> Larcopyle hayesi irregularis
Sister taxa: L. hayesi hayesi, L. hayesi irregularis


Citation: Larcopyle hayesi irregularis Lazarus et al. 2005
taxonomic rank: sub-species
Basionym: Larcopyle hayesi irregularis

Catalog entries: Larcopyle hayesi irregularis

Original description:

The large (250–300 μm) shell has an ellipsoidal shape. A single (?) spiral with closely spaced whorls surrounds a central spongy mass. Medium-sized pores with frames perforate the outer wall. The beams, particularly in the inner half of the shell are not so well aligned between whorls, so the characteristic white stripes of L. h. ‘hayesi’ are only developed in the outer part of the shell in L. h. ‘irregularis’. A wide pylome with teeth is obvious in most specimens. Transitional specimens to L. h. ‘haysei’ are very common.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Miocene Epoch (5.33-23.03Ma, top in Messinian stage). Data source: Lazarus et al. 2005
First occurrence (base): within Oligocene Epoch (23.03-33.89Ma, base in Rupelian stage). Data source: Lazarus et al. 2005

Plot of occurrence data:



Larcopyle hayesi irregularis compiled by the radiolaria@mikrotax project team viewed: 2-3-2024

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!