I've had this piece for several years during which it has been referred to as a Welsophyllia, a Lobophyllia, and a Symphyllia. Any Phyllia fanatics that can help me out here?
My guess is Symphyllia because of the long straight valleys and discontinuous high ridges. Definitely not Welsophyllia (now identified as Trachyphyllia), and highly unlikely a Lobophyllia. Now you might wish to add one more “phyllia,” an Oulophyllia. But my money is still on the Symphyllia. Following along.