Sweltsa hoffmani Kondratieff & Kirchner

DeWalt, R. Edward & Grubbs, Scott A., 2011, Updates To The Stonefly Fauna Of Illinois And Indiana, Illiesia 7 (3), pp. 31-50 : 39

Sweltsa hoffmani Kondratieff & Kirchner .

Grubbs (2004) reported a single population of Sweltsa onkos (Ricker) from Yellow Birch Ravine Nature Preserve in Crawford County, Indiana. Several populations of Sweltsa have since been found in ravine streams extending westward to within ca. 60 km of the Illinois border. Kondratieff & Kirchner (2009) recently described a new species, S. hoffmani , whose distribution is mainly in unglaciated landscapes to the south and west of S. onkos . Although most of our Indiana Sweltsa specimens are nymphs and females, several males have been identified as S. hoffmani and we feel confident that S. onkos does not occur in Indiana.

IN, Monroe Co., Tributary Clear Creek , Cedar Bluff Nature Preserve , 39.0364, -86.5636, 3/24/2006, R.E. DeWalt, S.A. Grubbs, ♀ (reared), N ( INHS) ; Morgan Co., Stream at jct. IN-39 & 142 , 5 mi. S. Monrovia, 39.50719, -86.45596, 4/11/1975, A.V. Provonsha, L. Dersch, 2N ( PERC) ; Parke Co., Rocky Hollow Creek , 6 km NNW Marshall, Turkey Run State Park , Rocky Hollow Falls Canyon Nature Preserve , 39.8952, -87.1990, 4/9/2006, R.E. DeWalt, 3N ( INHS) ; same but 5/7/2006, 2♀ (reared), 3 exuviae ( INHS) ; Putnam Co., Tributary to Big Walnut Creek , 3 km ESE Bainbridge, Hall Woods Nature Preserve , 4/30/2007, R.E. DeWalt, ♂ (reared) ( INHS) ; same location, 4/20/2008, R.E. DeWalt, S.K. Ferguson, 4N ( INHS) ; Ripley Co., Tributary Laughery Creek , 2 km E Versailles, U.S. 50/Rte. 129, 5/11/2003, S.A. Grubbs, 2♀ ( WKU) .