Catalog entries: Lampromitridae [no catalog entry yet]
Distinguishing features:
Parent taxon (Plagiacanthidae):
This taxon: Wide conical 2 segmented forms with a small simple subspherical cephalis. External cephalic spines usually cylindrical in cross section, thorax termination usually without a peristome or skirt.
as Theopilida in Haeckel 1881: Tricystida aperta triradiata. De Wever et al. 2001: Hat-shaped to helmet-conical nassellarians consiting usually of two to three segments. Cephalis simple, without ventral tube or well marked arches.
Morphology:
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Theopiliidae compiled by the radiolaria@mikrotax project team viewed: 10-12-2024
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