Genus Polysphaeridium

Species total:
82
Age range:
230 - 0 MA (obsolete dating)
IRMNG:
find
Name From To Age range
Polysphaeridium fabium Early Cretaceous Early Cretaceous
Polysphaeridium flexuosum Valanginian Aptian
Polysphaeridium fluctuans Early Eocene Middle Eocene
Polysphaeridium follium Early Cretaceous Early Cretaceous
Polysphaeridium fucosum Cretaceous Maastrichtian
Polysphaeridium giganteum Paleocene Eocene
Polysphaeridium granulosum Campanian Maastrichtian
Polysphaeridium inflectospinum Oligocene Serravallian
Polysphaeridium laminaspinosum Neocomian Coniacian
Polysphaeridium langii Middle Rhaetian Sinemurian
Polysphaeridium lemniscatum Early Tertiary Early Tertiary
Polysphaeridium majus Late Cretaceous Early Eocene
Polysphaeridium marsupium Early Cretaceous Early Cretaceous
Polysphaeridium microtriainum Lutetian Lutetian
Polysphaeridium multispinosum Valanginian Early Albian
Polysphaeridium ornamentum Eocene Eocene
Polysphaeridium pachydermum Nd Nd