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Genus Hystrichosphaeridium

Species total:
513
Age range:
4100 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Hystrichosphaeridium bifurcatum Early Ordovician Early Ordovician
Hystrichosphaeridium ramusculosum Tremadocian Givetian
Hystrichosphaeridium stellaeforme Early Ordovician Early Ordovician
Hystrichosphaeridium microcystis Ordovician Ordovician
Hystrichosphaeridium rjabininii Ordovician Ordovician
Hystrichosphaeridium zonale Early Ordovician Early Ordovician
Hystrichosphaeridium subrecurvum Early Ordovician Early Ordovician
Hystrichosphaeridium communis Ordovician Silurian
Hystrichosphaeridium nudatum Ordovician Ordovician
Hystrichosphaeridium spinescens Ordovician Ordovician
Hystrichosphaeridium cognitum Ordovician Middle Ordovician
Hystrichosphaeridium circumscissum Early Ordovician Early Ordovician
Hystrichosphaeridium diploporum Ordovician Ordovician
Hystrichosphaeridium hymenoferum Ordovician Ordovician
Hystrichosphaeridium digitatum Tremadocian Late Eocene
Hystrichosphaeridium ordovicum Ordovician Ordovician
Hystrichosphaeridium balticum Early Ordovician Late Ordovician