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Mucrospirifer
genus
Sensitive Classification
Fossils are sensitive in nature and should not be collected unless it is done legally and responsibly. Vertebrate fossils are illegal to collect on public lands.
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On Wikipedia
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.The biconvex shell was typically 2.5 cm long, but sometimes grew to 4 cm. The shell of Mucrospirifer has a fold, sulcus and costae. It is greatly elongated along the hinge line, which extends outward to form sharp points. This gives them a fin- or wing-like appearance. The apex area (umbo) of the pedicle valve contains a small fold for the pedicle. Mucrospirifer lived in muddy marine sediments, and were attached to the sea floor via the pedicle. The shell…
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Formations Found In
Traverse Group
554
Observations
JAN - DEC
Traverse Group (MIDt;0)
554
Observations
JAN - DEC
Machias Formation
390
Observations
Machias Formation (NYDcy;4)
390
Observations
Ludlowville Formation
218
Observations
JAN - DEC
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