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January 2014

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Mark S. Harvey 1,2,3,4,5 and J. Judson Wynne 6 : 1 Department of Terrestrial Zoology, Western Australian Museum, Locked Bag 49, Welshpool DC, Western Australia 6986, Australia; 2 Research Associate, Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024-5192, U.S.A; 3 Research Associate, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, California 94118, U.S.A; 4 Adjunct, School of Animal Biology, University of Western Australia, Crawley, Western Australia 6009, Australia; 5 Adjunct, School of Natural Sciences, Edith Cowan University, Joondalup, Western Australia 6027, Australia; 6 Department of Biological Sciences, Colorado Plateau Biodiversity Center, Landscape Conservation Initiative, Northern Arizona University, Box 5640, Flagstaff, Arizona 86011, U.S.A. E-mail: mark.harvey@museum.wa.gov.au Abstract. This study reports on the pseudoscorpion fauna of the subterranean ecosystems of northern Arizona, U.S.A. Our work resulted in the descriptions of two new species, Hesperochernes bradybaughi sp. nov. and Tuberochernes cohni sp. nov. (Chernetidae) and the range expansion of one species, Larca cavicola (Muchmore 1981) (Larcidae). All of these species were cave-adapted and found within caves on Grand Canyon-Parashant National Monument in northwestern Arizona. Based upon this work, the genus Archeolarca Hoff and Clawson is newly synonymized with Larca Chamberlin, and the following species are transferred from Archeolarca to Larca , forming the new combinations L. aalbui (Muchmore 1984), L. cavicola (Muchmore 1981), L. guadalupensis (Muchmore 1981) and L. welbourni (Muchmore 1981). Despite intensive sampling on the monument, the two new species were detected in only one cave. This cave supports the greatest diversity of troglomorphic arthropod species on the monument-all of which are short-range endemics occurring in only one cave. Maintaining the management recommendations provided by Peck and Wynne (2013) for this cave should aid in the long- term persistence of these new pseudoscorpion species, as well as the other troglomorphic arthropods. Keywords: Nearctic, troglomorphy, troglobite, new synonymy, cave urn:lsid:zoobank.org:pub:A15CB9DB-5B36-4A7C-8052-08E2EC1F4D34 Open Access - Permission by Author(s) See Extended description for more information.

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K26-04813

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