Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Acuña Cactus and the Fickeisen Plains Cactus

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We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Echinomastus erectocentrus var. acunensis (acu[ntilde]a cactus) and the Pediocactus peeblesianus var. fickeiseniae (Fickeisen plains cactus) under the Endangered Species Act. Critical habitat for the acu[ntilde]a cactus is located in Maricopa, Pima, and Pinal Counties, Arizona, and critical habitat for the Fickeisen plains cactus is located in Coconino and Mohave Counties, Arizona. The effect of this regulation is to designate critical habitat for the acu[ntilde]a cactus and the Fickeisen plains cactus under the Endangered Species Act.