Genus Polysphaeridium

Species total:
82
Age range:
230 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Polysphaeridium sp. Xu et al,1997 Middle Eocene Late Eocene
Polysphaeridium sp.1 Berriasian Early Pliocene
Polysphaeridium sp.2 Late Albian Late Albian
Polysphaeridium sp.3 Maastrichtian Maastrichtian
Polysphaeridium sp.4 Maastrichtian Maastrichtian
Polysphaeridium sp.4 Zait.,1967 Late Cretaceous Late Cretaceous
Polysphaeridium sp.A Berriasian Late Miocene
Polysphaeridium sp.A Brow.& Down.,1985 Nd Nd
Polysphaeridium sp.A Byun & Yun,1992 Langhian Langhian
Polysphaeridium sp.A Yun 1987 Nd Nd
Polysphaeridium sp.A Yun 1989 Nd Nd
Polysphaeridium sp.A Yun,1987 Miocene Miocene
Polysphaeridium sp.AE Early Valanginian Middle Valanginian
Polysphaeridium sp.B Cenomanian Burdigalian
Polysphaeridium sp.I Late Aptian Early Albian
Polysphaeridium subtile Albian Zanclean
Polysphaeridium sulaimanii Late Jurassic Late Jurassic