Lychnocanoma costata

Taxonomy

Catalog entries: Lychnocanoma costata

Original description: Shell of two segments. Cephalis small, subhemispherical with a few small circular pores, bearing a stout or thin conical apical horn. Collar structure indistinct externally, internally with three large and two small collar pores. Cephalic structure has A, V, MB, two L, two l and D; two L and D extend to three feet along the inside of wall as internal ribs. Thorax large, inflated campanulate with many well-developed costae which begin at the base of the cephalis or on the proximal thorax. Between adjacent costae are longitudinal rows of small, circular pores. In the proximal part of the thorax the pores are irregular in size and form, and the costae are inconstant. Three feet depending from the distalmost thorax are cylindrical, slightly curved outward, divergent distally and sometimes forming a ring by branches.
Remarks on original description: The following species is assigned with great hesitation to this genus because of possessing different cephalic structures than the other species of the genus.

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 costata, synonyms included - Lychnocanoma (?) costata;
• See also space-time plot :: Samples map :: Parent: Lychnocanoma

Lychnocanoma costata 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=204644 Go to Archive.is to create a permanent copy of this page - citation notes

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