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Genus Hystrichosphaeridium

Species total:
513
Age range:
4100 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Hystrichosphaeridium veliferum Tremadocian Tremadocian
Hystrichosphaeridium arrectum Ordovician Early Caradocian
Hystrichosphaeridium spinellosum Ordovician Ordovician
Hystrichosphaeridium tuberatum Tremadocian Tremadocian
Hystrichosphaeridium gdovia Early Ordovician Early Ordovician
Hystrichosphaeridium monstruosum Early Ordovician Early Cenomanian
Hystrichosphaeridium marginatum Early Ordovician Early Ordovician
Hystrichosphaeridium triplicativum Early Ordovician Early Ordovician
Hystrichosphaeridium ferox Early Ordovician Oligocene
Hystrichosphaeridium aculeatum Ordovician Ordovician
Hystrichosphaeridium trispiculare Ordovician Caradocian
Hystrichosphaeridium spiculare Ordovician Caradocian
Hystrichosphaeridium wimanii Tremadocian Llandoverian
Hystrichosphaeridium hystrichoreticulatum Ordovician Ordovician
Hystrichosphaeridium polyradiatum Early Ordovician Middle Ordovician
Hystrichosphaeridium authoforum Early Ordovician Early Ordovician
Hystrichosphaeridium hirsutum Ordovician Eocene