Lychnocanoma auxilla

Taxonomy

Catalog entries: Lychnocanoma auxilla

Original description: Shell of two complete segments, a fragile, generally incomplete, third segment, and three feet; first two segments pyriform with contour of cephalis and thorax merging. Cephalis subspherical with a few, small, circular pores bearing a stout, finely striated, conical horn; internally collar stricture with four collar pores; externally an upwardly directed vertical pore opens from the thick thoracic wall which envelopes the basal cephalis. Thorax subcampanulate, asymmetric proximally where the vertical pore expands the shell wall; surface smooth or finely papillate; pores subcircular, frequently with uneven margins, irregular in size, shape, and distribution. Three stout, finely striated feet depend from the distal thorax. A third segment with a thin, fragile, irregularly porous wall joins the three feet proximally. When broken away or not well developed, tiny thorns on the inner margin of the proximal feet and fragments attached to the thorax indicate its probable presence.

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: Lychnocanoma auxilla, synonyms included - Lychnocanoma auxilla;
• See also space-time plot :: Samples map :: Parent: Lychnocanoma

Lychnocanoma auxilla compiled by the radiolaria@mikrotax project team viewed: 22-7-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204641 Go to Archive.is to create a permanent copy of this page - citation notes

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