Mucrospirifer
Extinct genus of brachiopods
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 sometimes looks like two seashells stuck together.
01Species
- 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
Sources and credits
This article is adapted from the Wikipedia article “Mucrospirifer”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Mucrospirifer mucronatus Silica Shale.JPG by Wilson44691, CC BY-SA 3.0
- Mucrospirifer diluvianoides 2 pedunculate valve.jpg by Dwergenpaartje, CC BY-SA 3.0
- Mucrospirifer thedfordensis.1 - Devonico.JPG by porshunta, CC BY-SA 3.0
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