Protosphaeridium |
Protosphaeridium laccatum
|
Antarctica |
Riphean |
|
Trachysphaeridium |
Trachysphaeridium patellare
|
Antarctica |
Riphean |
|
Protoleiosphaeridium |
Protoleiosphaeridium flexuosum
|
Antarctica |
Riphean |
|
Protoleiosphaeridium |
Protoleiosphaeridium infriatum
|
Antarctica |
Riphean |
|
Protoleiosphaeridium |
Protoleiosphaeridium nervatum
|
Antarctica |
Riphean |
|
Protoleiosphaeridium |
Protoleiosphaeridium debilum
|
Antarctica |
Riphean |
|
Protoleiosphaeridium |
Protoleiosphaeridium cultum
|
Antarctica |
Riphean |
|
Rifeniata |
Rifeniata mirabilis
|
Antarctica |
Riphean |
|
Orygmatosphaeridium |
Orygmatosphaeridium semireticulatum
|
Antarctica |
Riphean |
|
Orygmatosphaeridium |
Orygmatosphaeridium rubiginosum
|
Antarctica |
Riphean |
|
Contextus |
Contextus laevisus
|
Antarctica |
Riphean |
|
Prolaminarites |
Prolaminarites gurosus
|
Antarctica |
Riphean |
|
Laminarites |
Laminarites antiquissimus
|
Antarctica |
Riphean |
|
Laminarites |
Laminarites antiquissimus
|
Antarctica |
Riphean |
|
Protoleiosphaeridium |
Protoleiosphaeridium sorediforme
|
Antarctica |
Riphean |
Vendian |
Protoleiosphaeridium |
Protoleiosphaeridium prolixum
|
Antarctica |
Riphean |
Vendian |
Protoleiosphaeridium |
Protoleiosphaeridium sorediforme
|
Antarctica |
Riphean |
Vendian |