Euschistus servus ( Say, 1831a )

Rider, David A. & Swanson, Daniel R., 2021, A distributional synopsis of the Pentatomidae (Heteroptera) north of Mexico, including new state and provincial records, Zootaxa 5015 (1), pp. 1-69 : 20

Euschistus servus ( Say, 1831a)

New state record: Wyoming: Sheridan Co.: Big Horn, Metz (1♂ DAR) .

Distribution: Canada: AB, BC, MB ( Walley 1929, Maw et al. 2000), NB ( Scudder 2008, Roch 2020), NF ( Roch 2020), NS, ON, PE ( Beirne 1972, Roch 2020), QC, SK ( Brown 1941, Maw et al. 2000). United States: AL ( Malloch 1919), AR, AZ, CA, CO, CT ( Parshley 1917, 1923a; O’Donnell & Schaefer 2012), DC, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME ( Parshley 1914, 1917; Johnson 1927, Roch 2020), MI, MN ( Koch et al. 2014), MO, MS, MT, NC, ND ( Uhler 1876, see comments below; Hussey 1922; Rider 2012), NE, NH, NJ, NM, NY, OH, OK ( Carpenter 1937, Arnold & Drew 1988, Smith et al. 1996, Kondratieff et al. 2005), OR ( Osborn 1893), PA, RI ( Parshley 1917), SC, SD ( Parshley 1922, Harris 1937, Morihara & Balsbaugh 1976), TN ( Malloch 1919, Howden & Crossley 1961, Lambdin et al. 2003, Vlach et al. 2010), TX, UT, VA, VT ( Roch 2020), WA ( Osborn 1893, Zack et al. 2012), WI ( Vollenhoven 1868; Stål 1872; Williams 2004, 2015), WV ( Brown et al. 1988), WY. ( Mexico)

Comments: Traditionally, two subspecies have been recognized within this taxon with the nominate subspecies (juga and tylus subequal in length) occurring more to the south and Euschistus servus euschistoides (Vollenhoven) (juga longer than tylus) more to the north. After studying the recorded distributions of these two forms, it is our opinion that these two forms do not fit the standard definition of a subspecies; that is, these two forms are broadly sympatric with numerous intermediates in the zone of overlap. We prefer to recognize this taxon as a single species with northern and southern forms. Froeschner (1988) listed both as subspecies. Many of the early records of the more northern form are under the synonymic name Euschistus fissilis Uhler , and some of the early records of the more southern form are under another synonymic name Euschistus impictiventris Stål. The ‘Dakota’ record ( Uhler 1876) probably applies to North Dakota (see Rider 2012). This species is commonly called the brown stink bug.