Catalog entries: Tympanidium foliosum
Original description: Shell with twelve gates; the four lateral gates simple. Basal gates of the shell larger than the mitral gates. Sagittal ring ovate, much smaller than the three other meridional rings, which are armed with numerous large elegant spines, bearing a lanceolate leaf on a thin pedicle. The sagittal ring bears a bunch of similar spines only at the apex, and on both poles of the sagittal axis (in the equator) a single forked spine, with two thorny branches.
Remarks on original description: Haeckel listed Tympanidium foliosum under the subgeneric name Tympanura, but did not include the subgeneric name in the species name.[comment from RadWorld database]
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"
Plot of occurrence data:
Tympanidium foliosum compiled by the radiolaria@mikrotax project team viewed: 20-4-2021
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205981 Go to Archive.is to create a permanent copy of this page - citation notes