radiolaria - rads_cat - Coronidium radiolaria - rads_cat - Coronidium


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 -> Coronidium
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Coronidium acacia Haeckel 1887

Coronidium cervicorne Haeckel 1887

Coronidium diadema Haeckel 1887

Coronidium dyostephanus Haeckel 1887


Citation: Coronidium Haeckel 1887
taxonomic rank: genus
Type species: Coronidium dyostephanus Haeckel 1887 [designated by Campbell,1954, p.D107]
Described on page(s) : 973

Current identification:

Original Description

Coronida with five large simple gates (four lateral and one basal). Skeleton composed of two incomplete meridional rings and one complete basal ring, without lattice-work.

The genus Coronidium and the following, nearly allied Acanthodesmia, form together the peculiar subfamily of Acanthodesmida - not in the wider sense in which I first founded this group (1862, Monogr. d. Radiol., p.265), but in the restricted sense, which is exactly defined in my Prodromus (1881, p.445). According to this definition, the shell is composed of three different rings, perpendicular to one another; only one of these is complete, the simple horizontal basal ring; the two others are incomplete and vertical (the primary or sagittal and the secondary or frontal ring). Therefore there remain constantly between the three rings five characteristic large openings or gates; four of these are lateral (between the halves of the two meridional rings), the fifth is basal, enclosed by the horizontal basal ring. The longest known type of this subfamily is Acanthodesmia vinculata, the five characteristic gates of which are clearly distinguished by its discoverer, Johannes Muller (""Das Gehause besteht nur aus den Leisten zwischen funf grossen Lucken ""). The Acanthodesmida may be derived from the Eucoronida by reduction of the basilar rod of the sagittal ring. If in Eucoronis this basal rod be lost, Coronidium arises.

From the Greek coronidium = small crown"


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


Coronidium compiled by the radiolaria@mikrotax project team viewed: 14-6-2024

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