Artobotrys auriculaleporis

Taxonomy

Catalog entries: Lophophaena auriculaleporis

Original description: Shell small, with two strong, forked, very prominent apical horns, the larger one usually subvertical, 0.5 total length, and the smaller, subhorizontal one 0.3 total length, the tips sharp, the horns both very stout (about 3°), equally four-bladed, the angles decurrent distally, strong basally, slightly twisted, the level of origin not especially modified as the horns arise directly from the cephalis, the horns well-separated (45° in some, and 90° in other, individuals); cephalis small, asymmetrical with the top higher on the side with the vertical horn, wide, apically the space between the horns flattened, sides expanded from top to base, the basal diameter twice the height, the height only about 0.12 total length; thorax truncate-ovate (40° in the upper part, later 10° and finally 30° in the contracted 0.25 of thorax), the sides very strongly convex, trim, apertural end truncated squarely, the diameter 0.3 total length, with a thin, subregular, rounded rim like the moulded edge of a metal pail, the rim slightly irregular as if torn along the free edge; wall mostly thin, a little thicker at the top of the cephalis than elsewhere, generally neat; surface of horns, hyaline; of cephalis, hyaline save a scattering of small, pimplelike dots; of thorax, with a great many circular pores of several sizes, the largest pores being near the middle, and the smaller ones irregularly scattered among them and below, the pores all well-spaced, no pores just above the apertural rim, but a regular row is found exactly above the rim; framework light.

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:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Artobotrys auriculaleporis, synonyms included - Artobotrys auriculaleporis;
• See also space-time plot :: Samples map :: Parent: Artobotrys

Artobotrys auriculaleporis compiled by the radiolaria@mikrotax project team viewed: 10-12-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=203237 Go to Archive.is to create a permanent copy of this page - citation notes

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