Mucrospirifer

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Mucrospirifer is a genus of extinct brachiopods in the class Rhynchonellata (Articulata) and the order Spiriferida. They are sometimes known as "butterfly shells".[1] Like other brachiopods, they were filter feeders. These fossils occur mainly in Middle Devonian strata[1] and appear to occur around the world, except in Australia and Antarctica.[2][3]

The biconvex shell was typically 2.5 cm long,[1] 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.[1] This gives them a fin- or wing-like appearance. The apex area (umbo) of the pedicle valve contains a small fold for the pedicle.[1] 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.

Species

File:Mucrospirifer diluvianoides 2 pedunculate valve.jpg
Mucrospirifer diluvianoides
File:Mucrospirifer thedfordensis.1 - Devonico.JPG
Mucrospirifer thedfordensis
  • 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

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  1. ↑ a b c d e Script error: No such module "citation/CS1".
  2. ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
  3. ↑ Global Biodiversity Information Facility

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External links

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