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Genus Trachysphaeridium

Species total:
122
Age range:
4100 - 54.5 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Trachysphaeridium simplex Precambriam Arenigian
Trachysphaeridium sp Precambriam Carboniferous
Trachysphaeridium sp. Kuma.& Sriv.,1991 Middle Proterozoic Middle Proterozoic
Trachysphaeridium sp. Kuma.& Sriv.,1995 Late Precambrian Late Precambrian
Trachysphaeridium sp. Ouya.et al,1974 Late Proterozoic Cambrian
Trachysphaeridium sp. Reit.& Holl,1988 Riphean Early Vendian
Trachysphaeridium sp. Timo.,1966 Proterozoic Silurian
Trachysphaeridium sp.1 Precambriam Middle Carboniferous
Trachysphaeridium sp.1 Comb.,1967 Early Tremadocian Early Tremadocian
Trachysphaeridium sp.1 Ouya.et al,1974 Late Proterozoic Cambrian
Trachysphaeridium sp.1 Zhan.,1978 Sinian Silurian
Trachysphaeridium sp.2 Precambriam Middle Carboniferous
Trachysphaeridium sp.2 Ouya.et al,1974 Late Proterozoic Cambrian
Trachysphaeridium sp.2 Zhan.,1978 Sinian Silurian
Trachysphaeridium sp.3 Precambriam Middle Carboniferous
Trachysphaeridium sp.3 Ouya.et al,1974 Late Proterozoic Cambrian
Trachysphaeridium sp.3 Zhan.,1978 Sinian Silurian