Baltisphaeridium |
Baltisphaeridium veliferum
|
England |
Late Ordovician |
|
Leiosphaeridia |
Leiosphaeridia globosa
|
England |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium malleoferum
|
England |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium veliferum
|
England |
Late Ordovician |
|
Leiosphaera |
Leiosphaera globosa
|
England |
Late Cretaceous |
|
Xanthidium |
Xanthidium fimbriatum
|
England |
Late Cretaceous |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
England(Shropshire) |
Tremadocian |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
England(Shropshire) |
Tremadocian |
|
Veryhachium |
Veryhachium tetraxis
|
England(Yorkshire) |
Late Oxfordian |
|
Chytroeisphaeridia |
Chytroeisphaeridia chytroeides
|
England(Yorkshire) |
Oxfordian |
|
Micrhystridium |
Micrhystridium tetraxis
|
England(Yorkshire) |
Late Oxfordian |
|
Chytroeisphaeridia |
Chytroeisphaeridia
|
England(Yorkshire) |
Oxfordian |
|
Leiosphaeridia |
Leiosphaeridia chytroeides
|
England(Yorkshire) |
Oxfordian |
|
Membranilarnacia |
Membranilarnacia pirus
|
France |
Middle Ordovician |
|
Baltisphaeridium |
Baltisphaeridium lewisii
|
France |
Late Couvinian |
|
Baltisphaeridium |
Baltisphaeridium denticulatum
|
France |
Late Cretaceous |
|
Baltisphaeridium |
Baltisphaeridium mariannae
|
France |
Late Cretaceous |
|