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Anastrophia grossa Brachiopod a.jpg

Dpaul7

By Dpaul7

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Anastrophia grossa Brachiopod
 
Bois d'Arc Formation (overlays the Haragan) of Oklahoma
TIME PERIOD: Lower Devonian (359-383 Million Years Ago)
Data: The genus Anastrophia first becomes widely seen in the Silurian and it extends into the lower Devonian before disappearing from the fossil record. The specimens below are Anastrophia grossa from the Bois d'Arc formation of Oklahoma. The shell is subpentagonal in outline with coarse costae present on both valves. There is a shallow sulcus on the pedicle valve that becomes much more expressed at the anterior margin forming a "u" shape. The corresponding fold is also shallow. Both valves are convex with the brachial valve being more so than the pedicle valve.
Kingdom: Animalia
Phylum: Brachiopoda
Class: Rhynchonellata
Order: †Pentamerida
Family: †Parastrophinidae
Genus: †Anastrophia
Species: †grossa

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MY FOSSIL Collection - Dpaul7

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Photo Information

  • Taken with Canon Canon PowerShot SX120 IS
  • Focal Length 7.3 mm
  • Exposure Time 1/60
  • f Aperture f/3.2
  • ISO Speed 80
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