12-month Finding on a Petition To List Sclerocactus brevispinus (Pariette cactus) as an Endangered or Threatened Species; Taxonomic Change From Sclerocactus glaucus to Sclerocactus brevispinus, S. glaucus, and S. wetlandicus

We, the U.S. Fish and Wildlife Service (Service), announce a 12-month finding on a petition to list Sclerocactus brevispinus (Pariette cactus) as an endangered or threatened species under the Endangered Species Act of 1973, as amended (Act). We also propose to change the taxonomy of the currently threatened Sclerocactus glaucus ``complex'' to three distinct species: Sclerocactus brevispinus, S. glaucus, and S. wetlandicus. Because these species make up what was formerly the ``complex'', each will maintain its status of being listed as threatened. After review of all available scientific and commercial information, we find that reclassifying S. brevispinus as endangered is warranted but precluded by higher priority actions to amend the Lists of Endangered and Threatened Wildlife and Plants. However, S. brevispinus is currently listed as threatened as part of the S. glaucus (Uinta Basin hookless cactus) complex. We further propose to revise the taxonomy of S. glaucus (Uinta Basin hookless cactus) (previously considered a ``complex''), which is currently listed as a threatened species. In accordance with the best available scientific information, we propose to recognize the three distinct species: S. brevispinus, S. glaucus, and S. wetlandicus. Because each of these three species constitute the S. glaucus complex, we consider all three species to be threatened under the Act. In addition, we propose common names for S. glaucus and S. wetlandicus.