Hystrichosphaeridium |
Hystrichosphaeridium
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium clavigerum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium hillii
|
Texas |
Early Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium irregulare
|
Texas |
Early Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium palmatum
|
France(Normandie) |
Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium recurvatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium spinipansatum
|
Texas |
Early Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium xipheum
|
W.Germany |
Middle Miocene |
|
Spiniferites |
Spiniferites
|
Nd |
Nd |
|
Spiniferites |
Spiniferites reginaldii
|
Nd |
Nd |
|
Systematophora |
Systematophora austinii
|
Texas |
Early Cretaceous |
|
Veryhachium |
Veryhachium deunffii
|
Canada(British Columbia) |
Scythian |
Anisian |
Veryhachium |
Veryhachium deunffii
|
Portugal |
Caradocian |
|