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Aciculopoda
''Aciculopoda'' is an extinct prawn which existed in what is now Oklahoma approximately . It was described in 2010 on the basis of a single fossil from Oklahoma. The single species, ''Aciculopoda mapesi'', was named by Rodney Feldmann and Carrie Schweitzer in honour of Royal Mapes, a paleontologist who discovered the type specimen. It is only the third unambiguous fossil decapod from before the Mesozoic.〔 ==Discovery== The fossil was discovered in the Woodford Shale, exposed at the Ryan Quarry, in Pontotoc County, Oklahoma. The Woodford Shale is a dark-colored siliceous shale which outcrops to the north-east and the south-west of the Arbuckle Mountains in Oklahoma. It contains "radiolarians, conodonts, sponge spicules, ammonoid and nautiloid cephalopods, inarticulate brachiopods () and small phyllocarid arthropods",〔 and spans the Devonian–Carboniferous boundary. The strata which produced ''Aciculopoda'' are thought on the basis of conodont biostratigraphy to be from the Famennian.〔
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