radiolaria - rads_cat - Amphitholus radiolaria - rads_cat - Amphitholus


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 -> A -> Amphitholus
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Amphitholus acanthometra Haeckel 1887
= Amphitholus acanthometra
not figuredAmphitholus armatus Haeckel 1887

not figuredAmphitholus artidium Haeckel 1887

Amphitholus artiscus Haeckel 1887

not figuredAmphitholus dodecanthus Haeckel 1887

not figuredAmphitholus octacanthus Haeckel 1887

Amphitholus panicium Haeckel 1887

not figuredAmphitholus polyacanthus Haeckel 1887


Citation: Amphitholus Haeckel 1887
taxonomic rank: genus
Type species: Amphitholus artiscus Haeckel 1887
Described on page(s) : 666
Family (traditional): not-known

Current identification/main database link: Amphitholus Haeckel 1887

Original Description

Tholonida with simple cortical shell (without external veil), with two hemispherical cupolas, opposite on the poles of one axis; central chamber (between them) Larnacilla-shaped, with medullary shell.

The genus Amphitholus is the most simple form of all Coccotholida (or all Tholonida provided with medullary shell). Its simple cortical shell exhibits, like Tholartus, two lateral hemispherical cupolas, attached on both sides of a lentelliptical central chamber (on the poles of its transverse axis). The central chamber has the form of a triaxial ellipsoid, and contains, like Larnacilla, a small medullary shell, connected with it by the wings of a latticed transverse girdle. Amphitholus may be derived either from Tholartus by secondary production of a cortical shell, or (more probably) from Larnacilla by apposition of two lateral dome-shaped protuberances. In the latter case it may be regarded as an Amphipyle, the lateral open wings of which are closed by lattice-work.

Greek amphitholus = shell with two opposite cupolas"

Extra details from original publication

Sub-genera described:


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 years 1873-1876. 18: 1-1803. gs O


Amphitholus compiled by the radiolaria@mikrotax project team viewed: 17-7-2024

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