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Gerothyris
Taxonomy
Gerothyris is a genus. It is not extant.
It was assigned to Spiriferida by Sepkoski (2002); and to Rhenothyridinae by Williams et al. (2006).
It was assigned to Spiriferida by Sepkoski (2002); and to Rhenothyridinae by Williams et al. (2006).