Lophocyrtis exitelus

Taxonomy

Catalog entries: Lophocyrtis exitelus

Original description: This species has a strongly developed apical spine with thorns near the distal end and arches at the base where it joins the cephalis. Cephalic wall perforated by 20-30 small circular to subcircular pores. Collar stricture marked by a distinct change in contour. Some specimens have a single row of larger pores just below the collar stricture. Thorax approximately hemispherical with a rough to thorny surface. There are about 16 to 31 pores around the greatest circumference. Abdomen reduced to a single row of large pores, followed in some specimens by a delicate subcylindrical part attached to the three to six widely divergent feet (Plate 1, 4 ). In most specimens there are only thorns on the feet marking attachments of this rarely preserved lattice (Plate 1, 2 ). The single row of large pores seems to be equivalent to a similar row in the ancestor L. (L.) jacchia, where the proximal abdominal pores are larger than the others. Three to six widely divergent feet, round in cross-section and no differentiated peristome.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in "Holocene" 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 exitelus, synonyms included - Lophocyrtis exitelus;
• See also space-time plot :: Samples map :: Parent: Lophocyrtis

Lophocyrtis exitelus compiled by the radiolaria@mikrotax project team viewed: 24-6-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204584 Go to Archive.is to create a permanent copy of this page - citation notes

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