radiolaria - rads_cenozoic - Theopiliidae radiolaria - rads_cenozoic - Theopiliidae


Classification: rads_cenozoic -> Plagiacanthidae -> Theopiliidae
Sister taxa: Lophophaenidae, Plagiacanthidae (ss), Plagiacanthidae inc sed, Sethoperidae, Sethophormididae, Theopiliidae
Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa

neptune records: 43
Clathrocycloma capitaneum
Clathrocycloma catherinea
Clathrocycloma parcum
Clathrocycloma sp.


neptune records: 97


neptune records: 112


Citation: Haeckel, 1881
taxonomic rank: family (new classif)
Type species: Theopilium Haeckel 1881
Taxonomic discussion: This family is part of the revised classification system being developed by Prof. Suzuki and colleagues

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.

Biogeography and Palaeobiology

Biostratigraphic distribution

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: 16-7-2024

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