First collection, most recent collection, locations, collectors:

05/01/1906; Franklin Co.; Columbus.; 39.9610; -82.9990;  GB Merrell
09/23/1996; Defiance Co.; St. Joseph R.; 41.3856°N, -84.8017°W; J Freda
09/14/2001; Pickaway Co.; Big Darby Cr.; 39.6286, -83.0097; E Moore
09/11/2002; Coshocton Co.; Kokosing R.; 40.3708, -82.1808; J Freda
09/11-13/2006; Coshocton Co.; Muskingum R.; 40.1664, -81.8875; Muskingum Co.; 39.8692, -81.9094; M Gray (nymphs)
08/01-02/2007; Coshocton Co.; Walhonding R.; 40.3272, -81.9431; 40.3414, -82.0647; 40.3581, -82.1380; E Moore
08/30/2007; Coshocton Co.; Kokosing R.; 40.3606, -82.1614; Knox Co.; 40.3724, -82.2006; E. Moore (nymphs)
09/05/2007; Knox Co.; Jelloway Cr.; 40.4473, -82.2956; E Moore (nymphs)
09/06-07/2007; Knox Co.; Mohican R.; 40.6029, -82.2481; 40.5222, -82.1958; 40.3581, -82.1380; Holmes Co.; Mohican R.; 40.5846, -82.1907; Coshocton Co.; Mohican R.; 40.4127, -82.1786; 40.3658, -82. 1575; MJ Bolton (nymphs)
08/01/2007; Coshocton Co. Walhonding R.; 40.3581, -82.1380; E Moore (nymphs)
08/22/2008; Licking Co.; Licking R.; 40.0567, -82.2203; C McKnight (nymphs)
08/19/2009; Holmes Co.; Killbuck Cr.; 40.6061, -81.9228; MJ Bolton (nymphs)
08/26/2009; Coshocton Co.; Killbuck Cr.; 40.3450, -81.9489; MJ Bolton (nymphs)
09/01/2011; Ross Co.; Scioto R.; 39.3419, -82.9742; E Moore (nymphs)
10/25/2009; Columbiana Co.; Little Beaver Cr.; 40.7129, -80.5468; RE DeWalt
2012; Ashland Co.; Clear Fork of Mohican R.; 40.6068, -82.2604; D Spreng, Jon Bossley, Jon Horn (nymphs)
2014; Knox Co.; Kokosing R.; 40.39736, -82.27878; R Davis & DH Dean (nymphs)

2015; Knox Co.; Kokosing R.; 40.39736, -82.27878; DH Dean (Adult, female, reared from nymph; emerged 11-V-2015, died 29-V-2015).