Multiple specimens of Cyclothyris bitririca （圖片來源：Baeza-Carratalá, J. F et al. (2023).，採用  CC BY-NC-ND 4.0  授權 ） 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 shell re