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

neptune records: 112


Citation: Haeckel, 1881
Rank: family (new classif)
Type species: Theopilium Haeckel 1881
Notes & 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: 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.

Morphology remarks:

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



Phylogenetic relations:

Similar species:

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Aquitanian Stage (0% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database

Plot of occurrence data:



Theopiliidae compiled by the radiolaria@mikrotax project team viewed: 1-10-2020

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