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Genus Hystrichosphaeridium

Species total:
513
Age range:
4100 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Hystrichosphaeridium staurasteroides Gothlandian Late Clintonian
Hystrichosphaeridium sprucegrovensis Late Devonian Late Devonian
Hystrichosphaeridium spiralisetum Late Cretaceous Late Cretaceous
Hystrichosphaeridium spinulosum Late Paleocene Middle Eocene
Hystrichosphaeridium spinosum Late Cretaceous Late Cretaceous
Hystrichosphaeridium spinoglobosum Late Devonian Late Devonian
Hystrichosphaeridium spinipansatum Early Cretaceous Early Cretaceous
Hystrichosphaeridium spinescens Ordovician Ordovician
Hystrichosphaeridium spinellosum Ordovician Ordovician
Hystrichosphaeridium spiculatum Cenomanian Cenomanian
Hystrichosphaeridium spiculare Ordovician Caradocian
Hystrichosphaeridium spiciferum Middle Devonian Middle Devonian
Hystrichosphaeridium spiceum Late Devonian Late Devonian
Hystrichosphaeridium spicatum Late Devonian Late Devonian
Hystrichosphaeridium spectabile Miocene Late Neogene
Hystrichosphaeridium speciale Nd Nd
Hystrichosphaeridium sp.H Late Aptian Late Aptian