Plectacantha cremastoplegma

Taxonomy

Catalog entries: Plectacantha cremastoplegma

Original description: One-segmented shell consisting of a basic spine structure connected distally by a thin, smooth, irregular lattice of straight bars and subangular to subcircular pores of varying size. Primary and secondary laterals, median bar, thorn-like axial rod, and apical spine present in the usual (Plagiocarpa, Popofsky, 1913, text-figure 2d) configuration. Primary laterals both fork distally, each forming 2 (sometimes 3) stout, 3-bladed spines. Secondary laterals strongly developed into stout, 3-bladed spines. Similar spines ("lateral apical") flank the apical spine, one on each side of it. Strong arches extend between the primary laterals, and from each primary lateral to its corresponding "lateral apical" spine and secondary lateral, Two, vertically directed, stout, 3-bladed spines originate at the points of bifurcation of the primary laterals, initially forming part of the arch structure.

Length of cephalis (excluding spines) 72-113µm. Maximum breadth of cephalis (excluding spines) 81-108µm.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

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:

• 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.
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Plectacantha

Plectacantha cremastoplegma compiled by the radiolaria@mikrotax project team viewed: 5-10-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205051 Go to Archive.is to create a permanent copy of this page - citation notes

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