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.
Species
'' '' •
Mucrospirifer albanensis •
Mucrospirifer arkonensis •
Mucrospirifer bouchardi •
Mucrospirifer diluvianoides •
Mucrospirifer grabaui •
Mucrospirifer medfordsis •
Mucrospirifer mucronatus (Conrad, 1841) •
Mucrospirifer paradoxiformis •
Mucrospirifer profundus •
Mucrospirifer prolificus •
Mucrospirifer refugiensis •
Mucrospirifer thedfordensis •
Mucrospirifer williamsi ==References==