Genus Acrosphaeridium

Species total:
4
Age range:
500 - 436.67 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Acrosphaeridium Ordovician Ordovician
Acrosphaeridium densum Late Llanvirnian Early Caradocian
Acrosphaeridium esthonicum Middle Caradocian Middle Ashgillian
Acrosphaeridium reticulatum Early Caradocian Early Caradocian