Spiriferida

Spiriferida is an extinct order of brachiopods, known from the Ordovician to the Triassic.

Spirifer is a genus of marine brachiopods belonging to the order Spiriferida and family Spiriferidae. Species belonging to the genus lived in the Carboniferous (certainly in the Tournaisian and in the Visean, possibly also in the Serpukhovian and the Bashkirian).

Mucrospirifer is a genus of extinct brachiopods in the class Rhynchonellata (Articulata) and the order Spiriferida. They are sometimes known as "butterfly shells". Like other brachiopods, they were filter feeders. These fossils occur mainly in Middle Devonian strata and appear to occur around the world, except in Australia and Antarctica.

Spiriferina is an extinct genus of brachiopods that lived in the Early Jurassic. Its representatives have been reported from Europe, North Africa, Saudi Arabia, and Alaska.