radiolaria - rads_cenozoic - Plagiacanthidae radiolaria - rads_cenozoic - Plagiacanthidae

Plagiacanthidae


Classification: rads_cenozoic -> Plagiacanthidae
Sister taxa: Actinommidae, Coccodiscidae, Heliodiscidae, Litheliidae, Orosphaeridae, Pyloniidae, Spongodiscidae, Streblonidae, 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
Lophophaenidae
Two segemented plagiacanthids with well developed cephalis and thorax, and generally some external expression of primary spicules - either as lateral external spines or prolonged in thorax as ribs/feet. Cephalis generally relatively large, thorax termination irregular and lacking any special structures.
neptune records:

Plagiacanthidae (ss)
Plagiacanthids without distinct lattice wall, consisting of the primary spicules with various branches or loose meshwork.
neptune records:
Plagiacantha
Plectagonidium
Protoscenium
Rhabdolithis
Tetraplecta

Plagiacanthidae inc sed

neptune records:
Theopilium
Tripilidium

Sethoperidae
One or two segmented forms with external spines usually connected by panels or arches of lattice wall.
neptune records:

Sethophormididae
Wide conical or nearly flat 2 segmented forms with relatively large but inconspicuous highly flattened cephalis.
neptune records:
Enneaphormis
Genetrix
Sethophormis
Tetraphormis
Velicucullus

Theopiliidae
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.
neptune records:
Clathrocycloma
Eucecryphalus
Lampromitra

Taxonomy

Citation: Plagiacanthidae
taxonomic rank: family
Basionym: Plagiacanthidae

Catalog entries: Plagiacanthidae [no catalog entry yet]

Description

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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Plagiacanthidae compiled by the radiolaria@mikrotax project team viewed: 27-2-2024

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205037 Go to Archive.is to create a permanent copy of this page - citation notes



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