Pteronarcys pictetii Hagen, 1873Capnia vernalis Newport, 1848

Grubbs, Scott A., Pessino, Massimo & DeWalt, R. Edward, 2012, Michigan Plecoptera (Stoneflies): Distribution Patterns And An Updated Species List, Illiesia 8 (18), pp. 162-173 : 168

Pteronarcys pictetii Hagen

Collection records. USA, Michigan: Crawford Co., Manistee River, near Grayling , 17.VI.1935, T. H. Frison 3♂ ( INHS) .

Comments. The sole Michigan locality for this broadly-distributed Nearctic species (DeWalt et al. 2012a) refers to a single historical record from the northern Lower Peninsula. More populations should be found with additional rearing of the nymphs, which at this time cannot be identified specifically.

Lake Superior species

Capnia vernalis Newport

Collection records. USA, Michigan: Keweenaw Co., Lake Superior, M-26, MDOT Esrey Roadside Park , 5 mi E Eagle Harbor, 47.4688, -88.0577, 27.V.1995, S.A. Grubbs, 3♀ ( WKU); Isle Royale, 14.VII.1905, H.A. Gleason ( Needham and Claassen 1925) .

Comments. This is a very broadly-distributed Nearctic species known from Atlantic Canada west to Alaska and south within the Rocky Mountain region to Colorado and New Mexico ( Nelson & Baumann 1989, DeWalt et al. 2012a). This is one of two species in Michigan, A. dichroa being the second, which is known only from rocky coastline habitat along Lake Superior.

Capnia vernalis Newport

Collection records. USA, Michigan: Keweenaw Co., Lake Superior, M-26, MDOT Esrey Roadside Park , 5 mi E Eagle Harbor, 47.4688, -88.0577, 27.V.1995, S.A. Grubbs, 3♀ ( WKU); Isle Royale, 14.VII.1905, H.A. Gleason ( Needham and Claassen 1925) .

Comments. This is a very broadly-distributed Nearctic species known from Atlantic Canada west to Alaska and south within the Rocky Mountain region to Colorado and New Mexico ( Nelson & Baumann 1989, DeWalt et al. 2012a). This is one of two species in Michigan, A. dichroa being the second, which is known only from rocky coastline habitat along Lake Superior.