radiolaria - rads_cenozoic - Phormostichoartus radiolaria - rads_cenozoic - Phormostichoartus


Classification: rads_cenozoic -> Artostrobiidae -> Phormostichoartus
Sister taxa: Artobotrys, Artostrobium, Aspis, Botryostrobus, Buryella, Dictyoprora, Lithamphora, Lithomitra, Phormostichoartus, Siphocampe, Siphostichartus, Spirocyrtis, Theocamptra, Tricolocampe
Daughter taxa (time control age-window is: 0-800Ma)
Phormostichoartus caryoforma

neptune records:
Phormostichoartus corbula

neptune records: 499
Phormostichoartus crustula

neptune records: 136
Phormostichoartus doliolum

neptune records: 800
Phormostichoartus fistula

neptune records: 850
Phormostichoartus furcaspiculata

neptune records: 22
Phormostichoartus marylandicus

neptune records: 293
Phormostichoartus multiseriatus

neptune records: 22
Phormostichoartus pitomorphus

neptune records: 60
Phormostichoartus platycephala

neptune records: 44
Phormostichoartus schneideri

neptune records: 1
Phormostichoartus strongi

neptune records:
Phormostichoartus sp.

neptune records: 81


Citation: Phormostichoartus Campbell 1951
taxonomic rank: genus
Basionym: Phormostichoartus

Catalog entries: Phormostichoartus

Original description: Cyrtophormis having the shell with numerous (12 to 20 or more) terminal feet.
Remarks on original description: [A new name proposed for Acanthocyrtis Haeckel, 1887a, p.1461, a junior homonym of Acanthocyrtis Haeckel, 1881a.]

[In the original publication (Haeckel, 1881, p.437) Acanthocyrtis was placed adjacent to Eucyrtidium (which genus was marked by an asterisk indicating a new genus!) and stated to be distinguished by ''testa spinosa,'' whereas Eucyrtidium was stated to be characterized by having ""testa laevi."" In 1887 Haeckel (p.1461) used the name Acanthocyrtis first as a subgenus of Cyrtophormis Haeckel 1887 stating, ""shell with numerous (12-20 or more) terminal feet and again later (p.1494) he used it as a subgenus of Eucyrtidium Ehrenberg 1847 where it was differentiated as having "Joints of the shell of very different lengths. Surface spiny. It is apparent that the later description is more nearly in keeping with the original intent of the description of Acanthocyrtis and this name should be retained for a subgenus of Eucyrtidium. For the other group a new name is needed.
The typical subgenus of Cyrtophormis has five to seven terminal feet in contrast with the greater number in this subgenus.]


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:


Campbell, A. S. (1951). New genera and subgenera of Radiolaria. Journal of Paleontology. 25(4): 527-530. gs


Phormostichoartus compiled by the radiolaria@mikrotax project team viewed: 23-5-2024

Taxon Search:
Advanced Search

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

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!