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.
| Tympanidium barbadense Haeckel 1887 | ||||
| Tympanidium binoctonum Haeckel 1887 = Tympanomma binoctonum | ||||
| Tympanidium foliosum Haeckel 1887 = Tympanidium foliosum | ||||
| not figured | Tympanidium spinosum Haeckel 1887 | |||
| not figured | Tympanidium staurocircum Haeckel 1887 |
Current identification/main database link: Tympanidium Haeckel 1887
Original Description
The genus Tympanidium differs from all other Protympanida in the development of four vertical rings, placed in four different meridional planes. Only one of these is complete, the primary sagittal ring; the three others are incomplete, inserted on the two horizontal rings, which are formed by the paired mitral and basal branches of the sagittal ring; one of these three lies in the frontal plane, the two others in diagonal meridional planes (between the frontal and sagittal). The shell therefore exhibits twelve large gates, four of which are horizontal (the two superior. mitral and the two inferior basal gates) ; the eight others are vertical, separated by the eight columellae, or the halves of the four meridional rings. In the subgenus Tympanomma the number of gates amounts to sixteen, the four lateral gates being bisected by an incomplete equatorial ring. The genus Tympanidium may be derived from Acrocubus by development of the two diagonal rings (between the frontal and sagittal).
Etymology:
Extra details from original publication
Sub-genera described:
Editors' Notes
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Tympanidium compiled by the radiolaria@mikrotax project team viewed: 7-9-2026
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=253804 Go to Archive.is to create a permanent copy of this page - citation notes |
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