Genus Hystrichosphaeridium

Species total:
513
Age range:
4100 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Hystrichosphaeridium semanticum Silurian Silurian
Hystrichosphaeridium seminudum Danian Danian
Hystrichosphaeridium senii Eocene Eocene
Hystrichosphaeridium sergipense Early Eocene Early Eocene
Hystrichosphaeridium setigerfurcatum Cambrian Llanvirnian
Hystrichosphaeridium sexradiatum Late Cambrian Tremadocian
Hystrichosphaeridium sheppeyense Eocene Middle Eocene
Hystrichosphaeridium shimizui Middle Miocene Middle Miocene
Hystrichosphaeridium sibiricum Middle Ordovician Late Ordovician
Hystrichosphaeridium siluricum Early Ludlovian Early Ludlovian
Hystrichosphaeridium simplex Late Cretaceous Middle Miocene
Hystrichosphaeridium simplicispinum Jurassic Eocene
Hystrichosphaeridium simulatum Middle Clintonian Middle Clintonian
Hystrichosphaeridium siphoniphorum Late Hauterivian Early Oligocene
Hystrichosphaeridium sp Precambriam Recent
Hystrichosphaeridium sp. Balt.,1969 Late Hauterivian Early Cenomanian
Hystrichosphaeridium sp. Bisw.,1962 Late Cretaceous Late Cretaceous