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INSECTA MUNDI A Journal of World Insect Systematics 0472 Fourteen new species of Sonoma Casey (Coleoptera: Staphylinidae: Pselaphinae) with a key to species from western North America Michael L. Ferro Clemson University Arthropod Collection Department of Agricultural and Environmental Sciences 277 Poole Agricultural Center, Clemson University Clemson, SC 29634-0310 USA Date of Issue: March 11, 2016 CENTER FOR SYSTEMATIC ENTOMOLOGY, INC., Gainesville, FL Michael L. Ferro Fourteen new species of Sonoma Casey (Coleoptera: Staphylinidae: Pselaphinae) with a key to species from western North America Insecta Mundi 0472: 1–57 ZooBank Registered: urn:lsid:zoobank.org:pub:B39DE284-15C2-4ADE-B1B9-9146D3DFE764 Published in 2016 by Center for Systematic Entomology, Inc. P. O. Box 141874 Gainesville, FL 32614-1874 USA http://centerforsystematicentomology.org/ Insecta Mundi is a journal primarily devoted to insect systematics, but articles can be published on any non-marine arthropod. 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Ferro Clemson University Arthropod Collection Department of Agricultural and Environmental Sciences 277 Poole Agricultural Center, Clemson University Clemson, SC 29634-0310 USA [email protected] Abstract. Fourteen new species of faronine pselaphines in the genus Sonoma Casey are described: S. agitator (California); S. cardiac (Oregon); S. carltoni (Oregon); S. cataloochee (North Carolina); S. caterinoi (California); S. chandleri (California); S. cobra (California); S. colberti (California); S. maryae (Oregon); S. quellazaire (Oregon); S. rossellinae (California); S. stewarti (California); S. twaini (California); and S. virgo (California, Oregon). Thirteen are from western North America and one from the eastern U.S. These species bring the total diversity of the genus to 57 species—40 from western North America and 17 from the eastern U.S. A key to, and updated distributions for, all western species are provided. Introduction Members of the genus Sonoma Casey (Coleoptera: Staphylinidae: Pselaphinae: Faronitae) are small, predacious, chiefl y leaf litter and rotten wood dwelling beetles. An updated taxonomic history was provided in Ferro and Carlton (2010), who also wrote about biology of the group. Recently, Owens et al. (2015) provided a list of Sonoma known from Mount Rainier National Park. After completion of the former manuscript (Ferro and Carlton 2010) the author received requests to provide identifi cations for specimens of Sonoma from western North America, and was invited by Don Chandler to examine several undescribed species of the genus in his collection. As a result of those studies 14 undescribed species were discovered, additional collection localities for described species were obtained (Appendix 1), and genitalia were re-fi gured for nearly all western species. Materials and Methods Specimens of Sonoma were examined from the following institutions. Collections and their acronyms are from Evenhuis (2014). Collection managers and curators are indicated. CAS California Academy of Sciences (San Francisco, CA, USA; Norman Penny). CNC Canadian National Collection of Insects (Ottawa, ON, Canada; Patrice Bouchard). CSCA California State Collection of Arthropods (Sacramento, CA, USA; Andrew Cline). DCPC Don Chandler Personal Collection; Durham, NH, USA. FMNH Field Museum of Natural History (Chicago, IL, USA; James Boone and Crystal Maier). FSCA Florida State Collection of Arthropods, Division of Plant Industry (Gainesville, FL, USA; Paul Skelley). LSAM Louisiana State Arthropod Museum, Louisiana State University (Baton Rouge, LA, USA; Victoria Bayless). MSUC Michigan State University (East Lansing, MI, USA; Anthony Cognato, Gary Parsons). NCSU North Carolina State University Insect Collection (Raleigh, NC, USA; Bob Blinn). OSUC C. A. Triplehorn Insect Collection, Ohio State University (Columbus, OH, USA; Luciana Musetti). RBCM Royal British Columbia Museum (Victoria, BC, Canada; Claudia Copley). RRPC Rodney J. Rood Personal Collection; Pullman, WA, USA. SBMN Santa Barbara Museum of Natural History (Santa Barbara, CA, USA; Michael Caterino and Matthew L. Gimmel). SEMC Snow Entomological Museum, University of Kansas (Lawrence, KS, USA; Zachary Falin). 2 • INSECTA MUNDI 0472, March 2016 FERRO UAM University of Alaska Museum (Fairbanks, AK, USA; Derek S. Sikes). UMRM W. R. Enns Entomology Museum, University of Missouri (Columbia, MO, USA; Kristin Simpson). USNM National Museum of Natural History (Washington, DC, USA; Floyd Shockley and Alexey Tishechkin). WSU Maurice T. James Entomological Collection, Washington State University (Pullman, WA, USA; Richard Zack). Verbatim label data are given for all identifi able specimens examined, with specimens separated by an asterisk (“*”), label breaks indicated by a slash (“/”), and the lending institution and number of specimens are indicated, e.g. “(4♂, FMNH)”. Specimen preparation and dissection followed procedures given in Ferro and Carlton (2010). Head, pronotum, elytra, and antennal measurements were taken from slide-mounted specimens when they were available, otherwise measurements were taken from the holotype. All measurements are in mil- limeters. All measurements were taken in the dorsal view and represent the maximum value. The head was measured from the anterior margin of the clypeus to the back of the temples (area of great- est constriction of the occiput), and width was measured at the middle of the eyes. Total length was measured from the holotype and was from the anterior margin of the clypeus to the end of the fourth visible abdominal tergite (segment VII). Following Chandler (2001) tergites and ventrites are given Arabic numbers to denote sclerites that are visible (1–5) and Roman numerals to denote the morpho- logical segments to which they belong (IV–VIII). Systematic Accounts Classifi cation of Sonoma Casey 1886 Order Coleoptera Linnaeus, 1758 Family Staphylinidae Latreille, 1802 Subfamily Pselaphinae Latreille, 1802 Supertribe Faronitae Reitter, 1882 Genus Sonoma Casey, 1886 For full synonymy and citations for family- and genus-group taxa, see Bouchard et al. (2011) and Newton et al. (2001). For a full description of the genus see Marsh and Schuster (1962). For convenience, the 57 species of Sonoma are separated into two groups based on general dis- tribution, eastern and western North America, with fi ner scale distributions, based on literature and specimens examined, noted as state and province codes. West of the Mississippi River S. agitator new species – CA S. cardiac new species – OR S. carltoni new species – OR