radiolaria - rads_cat - Triolena


This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: rads_cat -> T -> Triolena
Other pages this level: << < Tricolocapsa, Tricolospyris, Tricolpera, Tricorporisphaera, Tricranastrum, Tricyclidium, Tridictyopus, Trigonactura, Trigonastrum, Trigonocyclia, Trilampterium, Trilobatum, Trimanicula, Trimiduca, Triodiscus, Triolena, Triopyle, Triospyris, Triospyrium, Triostephus, Tripilidium, Triplagia, Triplagiacantha, Triplecta, Tripleurium, Tripocalpis, Tripocyclia, Tripocyrtis, Tripodictya, Tripodiscinus, Tripodiscium> >>

not figuredTriolena hexabelone Haeckel 1887

Triolena primordialis Haeckel 1887

not figuredTriolena tribelone Haeckel 1887

not figuredTriolena trigonalis Haeckel 1887

not figuredTriolena trispinosa Haeckel 1887


Citation: Triolena Haeckel 1887
Rank: genus
Type species: Triolena primordialis Haeckel 1887 [designated by Campbell,1954, p.D92]
Described on page(s) : 563
Family (traditional): not-known

Current identification:

Original Description
Pylodiscida with a simple, spherical or lenticular, central chamber, surrounded by three simple arm-chambers. Notches between the three arms open.

The genus Triolena is the most simple form of all Pylodiscida, and must be regarded as their common ancestral form, from an ontogenetic as well as a phylogenetic point of view. The small shell is composed of a simple, spherical or lenticular, latticed, central chamber, and: of three simple, surrounding equal arms, which are also simple latticed chambers, lie in the equatorial plane, and are separated by three equal angles or open gates.

Etymology: Greek triolena = shell with three arms"


Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gs


Triolena compiled by the radiolaria@mikrotax project team viewed: 28-9-2021

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