Catalog entries: Larcopyle hayesi hayesi
neotype: L. hayesi hayesi
neotype: L. hayesi hayesi
neotype: L. hayesi hayesi
x: L. hayesi hayesi
x: L. hayesi hayesi
x: L. hayesi hayesi
x: L. hayesi hayesi
x: L. hayesi hayesi
x: L. hayesi hayesi
x: L. hayesi hayesi
x: L. hayesi hayesiOriginal description:
The large shell (250–300 μm) is spherical to elliptical and sometimes has small thorns. The large pores are surrounded by pentagonal and hexagonal frames. Some pores appear to be subdivided into smaller pores by internal bar networks. The single spiral has up to 10, occasionally even more, closely spaced whorls. The levels of the whorls are connected by aligned beams, forming a characteristic radial pattern of dark bands (the beams) and white stripes (pore regions) when viewed in trans- mitted light. The meshwork of bars and beams can, in some of the intermediate spirals, create hub and spoke types of lattice- work, with a radial beam as the hub and triangular pores (apices directed inward) surrounding it. In the centre of the shell often a spongy mass can be seen which obscures the innermost whorls, although this is less well developed than in L. h. ‘irregularis’. A pylome is weak or absent, although many specimens have a few external spines, and often one rather stout spine with a flat tip extending from the pylome region.
Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"
Plot of occurrence data:
References:
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Larcopyle hayesi hayesi compiled by the radiolaria@mikrotax project team viewed: 10-9-2024
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204403 Go to Archive.is to create a permanent copy of this page - citation notes |