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 -> D -> Dizonium
Other pages this level: << < Diplocyclas, Diploplegma, Diplosphaera, Diplospongus, Dipodospyris, Dipospyris, Dipylissa, Discocephalus, Discopyle, Discospira, Discospirella, Discozonium, Disolenia, Dispongia, Distriactis, Dizonium, Dorcadospyris, Doryconthidium, Dorydiscus, Dorydruppa, Dorylonchella, Dorylonchidium, Dorylonchomma, Doryphacus, Doryprunum, Dorysphaera, Drepotadium, Druppatractus, Druppocarpus, Druppula, Drymosphaera> >>

not figuredDizonium amphacanthum Haeckel 1887

not figuredDizonium circulare Haeckel 1887

not figuredDizonium ellipticum Haeckel 1887

not figuredDizonium octacanthum Haeckel 1887

Dizonium pleuracanthum Haeckel 1887

Dizonium stauracanthum Haeckel 1887

not figuredDizonium transversum Haeckel 1887


Citation: Dizonium Haeckel 1887
Rank: genus
Type species: Dizonium circulare Haeckel 1887 [designated by Campbell,1954, p.D96]
Described on page(s) : 634
Family (traditional): not-known

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Current identification/main database link:

Original Description
Pylonida with simple, spherical or subspherical, central chamber, surrounded by two crossed latticed girdles, one smaller (primary) transverse and one larger (secondary) lateral girdle.

Etymology: From the Greek dizonium = with two girdles"

Extra details from original publication
The genus Dizonium differs from the preceding Monozonium in the possession of two crossed elliptical lattice-girdles. The smaller girdle, immediately surrounding the central chamber, is the transverse girdle (the single girdle of Monozonium). On the poles of its major axis (the transverse axis) it is connected with the larger girdle, the elliptical perimeter of which circumscribes the lateral plane. The minor axis of this latter is the major axis of the former. Between the two crossed girdles remain four larger openings or gates, quite as in Tetrapyle. But whilst in Tetrapyle the enclosed medullary shell is a trizonal Larnacilla-shell, here in Dizonium it is a simple spherical or lentelliptical chamber.
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 year 1873-1876, Zoology. 18: 1-1803. gs


Dizonium compiled by the radiolaria@mikrotax project team viewed: 29-11-2020

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