Lophocyrtis nomas

Taxonomy

Catalog entries: Lophocyrtis nomas

Original description: Cylindrical, three-segmented theoperid with an inflated subspherical thorax and cylindrical abdomen. Cephalis spherical, with a few small pores, or poreless, bearing a short conical apical horn, rarely with three ridges at its base. Apical spine partially free within the cephalis. Very short mitral arches merge with the top of the cephalic wall a short distance from the apical spine. The thorax is subspherical to inflated campanulate, and its surface smooth to slightly roughened by the pore frames. There are 20-30 quincuncially arranged circular pores on a half circumference. Collar and lumbar strictures well defined. Abdomen cylindrical to tapering distally with pores similar in size and arrangement to those on the thorax. The abdominal shell wall is more delicate than that of the thorax. Undifferentiated termination.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Early Miocene Sub-Epoch (15.97-23.03Ma, top in Burdigalian stage). Data source:
First occurrence (base): within Late Oligocene Sub-Epoch (23.03-28.09Ma, base in Chattian stage). Data source:

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: Lophocyrtis nomas, synonyms included - Lophocyrtis nomas;
• See also space-time plot :: Samples map :: Parent: Lophocyrtis

Lophocyrtis nomas compiled by the radiolaria@mikrotax project team viewed: 20-5-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204594 Go to Archive.is to create a permanent copy of this page - citation notes

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