Wikipedia
Strophomena
Strophomena is a genus of brachiopods belonging to the order Strophomenida family Strophomenidae, named by Rafinesque in 1824. They were stationary epifaunal suspension feeders.
These brachiopods (often known as lamp shells) lived from the Ordovician period in the Lower Llanvim age to the Silurian period in the Lower Llandovery age.