Tytthodiscus

Genus Tytthodiscus

Species total:
19

Age range:
4100 - 0 MA (obsolete dating)

IRMNG:
find

Name	From	To	Age range
Tytthodiscus tubulatus	Early Rhaetian	Early Rhaetian
Tytthodiscus vanderhammenii	Eocene	Early Miocene