Multiple specimens of Cyclothyris bitririca （Image source：Baeza-Carratalá, J. F et al. (2023).， CC BY-NC-ND 4.0 ） Age Cretaceous（Albian） 101 Ma Taxonomy Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: Rhynchonellida Family: Cyclothyrididae Genus: Cyclothyris Species: Cyclothyris bitririca Morphological description Cyclothyris bitririca is a medium-sized member of the rhynchonellid brachiopods. Both the ventral and dorsal valves are convex, with the shel