Genus Hystrichosphaeridium

Species total:
513
Age range:
4100 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Hystrichosphaeridium insigne Early Cambrian Middle Cambrian
Hystrichosphaeridium tolboschana Early Cambrian Middle Cambrian
Hystrichosphaeridium atavum Late Precambrian Middle Cambrian
Hystrichosphaeridium baciferum Late Proterozoic Cambrian
Hystrichosphaeridium sexradiatum Late Cambrian Tremadocian
Hystrichosphaeridium setigerfurcatum Cambrian Llanvirnian
Hystrichosphaeridium longispinosoides Late Cambrian Middle Ordovician
Hystrichosphaeridium polyradiatum Early Ordovician Middle Ordovician
Hystrichosphaeridium bimarginatum Ordovician Middle Ordovician
Hystrichosphaeridium cognitum Ordovician Middle Ordovician
Hystrichosphaeridium arrectum Ordovician Early Caradocian
Hystrichosphaeridium trispiculare Ordovician Caradocian
Hystrichosphaeridium spiculare Ordovician Caradocian
Hystrichosphaeridium monacanthum Ordovician Late Ordovician
Hystrichosphaeridium balticum Early Ordovician Late Ordovician
Hystrichosphaeridium sibiricum Middle Ordovician Late Ordovician
Hystrichosphaeridium gotlandicum Silurian Late Llandoverian