radiolaria - rads_cat - Circotympanum radiolaria - rads_cat - Circotympanum


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 -> C -> Circotympanum
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not figuredCircotympanum decagonium Haeckel 1887

not figuredCircotympanum hexagonium Haeckel 1887

Circotympanum octogonium Haeckel 1887


Citation: Circotympanum Haeckel 1887
taxonomic rank: genus
Type species: Circotympanum hexagonium Haeckel 1887 [designated by Campbell,1954, p.D110]
Described on page(s) : 1012

Current identification:

Original Description

Tympanida with two simple different horizontal rings, connected by numerous (six to eight or more) divergent columellae.

and a lower larger "basal ring") are connected by a variable number of divergent rods or columellae (at least six or eight). Circotympanum is probably derived from Tympaniscus or Tympanidium by partial reduction of the sagittal ring, the upper (apical) a


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


Circotympanum compiled by the radiolaria@mikrotax project team viewed: 21-6-2024

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