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.
![]() | Coronidium acacia Haeckel 1887 | |||
![]() | Coronidium cervicorne Haeckel 1887 | |||
![]() | Coronidium diadema Haeckel 1887 | |||
![]() | Coronidium dyostephanus Haeckel 1887 |
Current identification:
Original Description
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.
Etymology:
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Coronidium compiled by the radiolaria@mikrotax project team viewed: 28-4-2025
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=263035 Go to Archive.is to create a permanent copy of this page - citation notes |
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