radiolaria - rads_cenozoic - Actinommidae radiolaria - rads_cenozoic - Actinommidae

Actinommidae


Classification: rads_cenozoic -> Actinommidae
Sister taxa: Actinommidae, Coccodiscidae, Heliodiscidae, Litheliidae, Orosphaeridae, Pyloniidae, Spongodiscidae, Tholoniidae ⟩⟨ Amphipyndacidae, Archaeodictyomitridae, Artostrobiidae, Cannobotryidae, Carpocaniidae, Plagiacanthidae, Pterocorythidae, Theoperidae, Trissocyclidae ⟩⟨ Collophidiidae, Collosphaeridae, Sphaerozoidae ⟩⟨ incertae sedis, hidden
Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Actinommidae (ss)

neptune records:

Actinommidae inc sed

neptune records:
Actinosphaera
Diploplegma
Heliosoma
Spongodictyon

Astrosphaeridae

neptune records:

Centrocubidae

neptune records:
Centrocubus
Gonosphaera
Lonchosphaera
Octodendron

Hexalonchidae

neptune records:
Haliomma
Heliaster
Hexacontium
Hexacromyum
Hexalonche
Pentactinosphaera

Hexastylidae

neptune records:
Centracontium
Centrolonche
Hexastylus
Stigmosphaera

Pantanelliidae

neptune records:
Xiphosphaera

Quinquecapsulariidae

neptune records:
Joergensenium

Rhizosphaeridae

neptune records:
Rhizosphaera
Spongoplegma

Saturnalidae

neptune records:
Axoprunum
Saturnalis

Spongosphaeridae

neptune records:
Plegmosphaera
Spongodrymus
Spongosphaera
Styptosphaera

Stylosphaeridae

neptune records:

Taxonomy

Citation: Actinommidae
Taxonomic rank: family
Basionym: Actinommidae
Taxonomic discussion:
A probably polyphyletic group which has been divided using sometimes incompatible criteria into numerous subgroups by various authors.  Many proposed divisions are based on rather arbitrary characters, and may not be any more natural than many of those included in Haeckel's highly artificial taxonomy.  For example Ethmosphaeridae, a category of Haeckel for forms with no 'major' external spines is included in many modern classifications but shows virtually no molecular differences to a genus (Cladococcus) with substantial external spines [Biard et al. 2022]. Thus only a selection of proposed new families included here, mostly for the practical purpose of navigating the high diversity of the group, but these should be seen as highly provisional. - dl

Catalog entries: Actinommidae

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Description


Published descriptions



Lazarus et al. 2021- 


Spherical to ellipsoidal radiolarians with one or more mostly concentric lattice shells, connected by radial beams, sometimes with radial external spines.

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:

References:


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Actinommidae compiled by the radiolaria@mikrotax project team viewed: 12-5-2026

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=203036 Go to Archive.is to create a permanent copy of this page - citation notes



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