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Genus Hystrichosphaeridium

Species total:
513
Age range:
4100 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Hystrichosphaeridium sibiricum Middle Ordovician Late Ordovician
Hystrichosphaeridium peritropum Arenigian Arenigian
Hystrichosphaeridium trispinosum Ordovician Mississippian
Hystrichosphaeridium vitile Early Ordovician Early Ordovician
Hystrichosphaeridium sp. Down.,1958 Tremadocian Tremadocian
Hystrichosphaeridium corollatum Ordovician Ordovician
Hystrichosphaeridium rigens Early Ordovician Early Ordovician
Hystrichosphaeridium scapigerum Early Ordovician Early Ordovician
Hystrichosphaeridium apiculatum Ordovician Ordovician
Hystrichosphaeridium cristatum Tremadocian Tremadocian
Hystrichosphaeridium maximum Early Ordovician Early Ordovician
Hystrichosphaeridium polygonale Ordovician Ludlovian
Hystrichosphaeridium inconspicuum Ordovician Ordovician
Hystrichosphaeridium quadriradiatum Early Ordovician Early Ordovician
Hystrichosphaeridium veliferum Tremadocian Tremadocian
Hystrichosphaeridium arrectum Ordovician Early Caradocian
Hystrichosphaeridium spinellosum Ordovician Ordovician