radiolaria - rads_cenozoic - Plagiacanthidae (ss)

Plagiacanthidae (ss)

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

neptune records:
P. arachnoides
P. panarium
P. sp.


neptune records:
P. deflandrei
P. sp.


neptune records:
P. simplex
P. sp.


neptune records: 13
R. ellida
R. pipa
R. sp.


neptune records:
T. pinigera
T. plectaniscus
T. sp.


Citation: Hertwig, 1879
Rank: Family
Type species: Plagiacantha Clapar├Ęde 1858

Taxonomic discussion:
Plagiacanthidae (sensu stricto) - this category is being used for genera which were placed in the traditional family Plagiacanthidae and which are now placed in the revised family created from it with the same name but restricted scope [JRY 2020]

Catalog entries: Plagiacanthidae (ss) [no catalog entry yet]


Distinguishing features:
Parent taxon (Plagiacanthidae):
This taxon: Plagiacanthids without distinct lattice wall, consisting of the primary spicules with various branches or loose meshwork.

no clear formal definition in Hertwig. De Wever et al. 2001: Apoaxoplastidian skeleton represented exclusively by the initial spicule with, or without, connecting arches, or a very loose cephalic shell

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Danian Stage (0% up, 66Ma, in Danian stage). Data source: Total of range of species in this database

Plot of occurrence data:



Plagiacanthidae (ss) compiled by the radiolaria@mikrotax project team viewed: 20-10-2021

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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