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Genus Hystrichosphaeridium

Species total:
513
Age range:
4100 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Hystrichosphaeridium authoforum Early Ordovician Early Ordovician
Hystrichosphaeridium baciferum Late Proterozoic Cambrian
Hystrichosphaeridium bahiaense Eocene Miocene
Hystrichosphaeridium balticum Early Ordovician Late Ordovician
Hystrichosphaeridium bicyclospinosum Late Tithonian Hauterivian
Hystrichosphaeridium biforme Late Cretaceous Late Cretaceous
Hystrichosphaeridium biformoides Barremian Early Oligocene
Hystrichosphaeridium bifurcatum Early Ordovician Early Ordovician
Hystrichosphaeridium bimarginatum Ordovician Middle Ordovician
Hystrichosphaeridium bipartibilum Llandeilian Llandeilian
Hystrichosphaeridium bohemicum Silurian Silurian
Hystrichosphaeridium borracherosum Late Ordovician Late Ordovician
Hystrichosphaeridium bowerbankii Early Cretaceous Paleocene
Hystrichosphaeridium breviatum Late Thanetian Late Eocene
Hystrichosphaeridium brevifurcatum Llanvirnian Early Homerian
Hystrichosphaeridium brevispinosum Late Cambrian Late Eocene
Hystrichosphaeridium brevitrispinosum Late Devonian Late Devonian