Daughter taxa (time control age-window is: 0-800Ma)![]() | Granddaughter taxa | ||||
| Acropyramiidae neptune records: | |||||
| Anthocyrtidae neptune records: | |||||
| Bekomidae neptune records: | |||||
| Cycladophoridae neptune records: | |||||
| Eucyrtidiidae neptune records: | Artophormis Calocyclas Conicavus Cymaetron Cyrtocapsella Eucyrtidium Lithocampe Lithopera Lithostrobus Phormocyrtis Stichocorys | ||||
| Lophocyrtiidae neptune records: | |||||
| Lychnocaniidae neptune records: | |||||
| Stichopiliidae neptune records: | |||||
| Theocotylidae neptune records: | |||||
| Theoperidae (ss) neptune records: | |||||
| Theoperidae inc sed neptune records: | Anthocyrtoma Aphetocyrtis Archicorys Cassideus Conarachnium Cyrtolagena Dictyocephalus middouri Dictyopodium Diplocyclas Eurystomoskevos Lithapium Lithomitrissa Lophoconus Lophocorys Phrenocodon Sethochytris Sethoconus Sethocyrtis Stichocampe Theocorys Udan | ||||
Catalog entries: Theoperidae
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Published descriptions
Lazarus et al. 2021 -
Nassellarians with a simple (neither divided or lobed), usually relatively small cephalis
and at least one, generally several post cephalic segments, usually also with internal septa at
segment sutures.
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:
![]() |
Theoperidae compiled by the radiolaria@mikrotax project team viewed: 6-6-2026
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205843 Go to Archive.is to create a permanent copy of this page - citation notes |