striatus: exterior, and interior with lophophore See text Delthyris Spirifer is a genus of marine brachiopods belonging to the order Spiriferida and family Spiriferidae.

Species belonging to the genus lived from the Middle Ordovician (Sandbian) through to the Late Triassic (Carnian) with a global distribution.

They were stationary epifaunal suspension feeders.

[1] As Spirifer has been described early on, since then, many species have been reassigned.

[2][3][4] This brachiopod-related article is a stub.