Genus Trachysphaeridium

Species total:
122
Age range:
4100 - 54.5 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Trachysphaeridium Precambriam Permian
Trachysphaeridium acis Middle Proterozoic Middle Proterozoic
Trachysphaeridium adischevii Early Cambrian Early Cambrian
Trachysphaeridium adornatum Sinian Sinian
Trachysphaeridium angulatum Sinian Silurian
Trachysphaeridium apertum Precambriam Vendian
Trachysphaeridium araneosum Precambriam Precambriam
Trachysphaeridium asaphum Middle Proterozoic Early Cambrian
Trachysphaeridium asaphym Vendian Vendian
Trachysphaeridium asemantum Devonian Devonian
Trachysphaeridium asperatum Cambrian Silurian
Trachysphaeridium atteniatum Late Vendian Late Vendian
Trachysphaeridium attenuatum Precambriam Devonian
Trachysphaeridium bavlense Precambriam Early Cambrian
Trachysphaeridium bavlensum Vendian Early Cambrian
Trachysphaeridium caoshanense Sinian Sinian
Trachysphaeridium chihsienense Precambriam Precambriam