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.
Current identification:
Original Description
The genus Tympaniscus and the following Tympanidium differ from all preceding Tympanida in the multiplication of the vertical columellae, which connect the two horizontal bisected rings. Tympaniscus exhibits six columellae, which may be regarded as halves of three meridional rings. Only one, however, of these is complete (the sagittal ring, which bisects the mitral and the basal ring); the two other meridional rings, (placed in diagonal planes) may be regarded as produced by lateral bifurcation of an incomplete frontal ring; this appears to be already foreshadowed in the preceding Octotympanum.
Etymology:
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Tympaniscus compiled by the radiolaria@mikrotax project team viewed: 21-5-2025
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=253805 Go to Archive.is to create a permanent copy of this page - citation notes |
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