Creaserinus gilpini
Creaserinus gilpini, the Jefferson County crayfish, is a species of crayfish in the family Cambaridae. It is endemic to Arkansas. The IUCN conservation status of Creaserinus gilpini is "NT", near threatened. The species may be considered threatened in the near future. The IUCN status was reviewed in 2010. References

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Cambaridae
Crustaceans described in 1989
Taxa named by Horton H. Hobbs Jr.
Taxobox binomials not recognized by IUCN 
Endemic fauna of Arkansas