Pteronarcys pictetii Hagen, 1873

Myers, L. W. & Kondratieff, B. C., 2017, Larvae Of North American Species Of Pteronarcys (Plecoptera: Pteronarcyidae), Illiesia 13 (16), pp. 192-224 : 212-213

Pteronarcys pictetii Hagen, 1873

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org: TaxonName:470663

( Figs. 37–44 )

Remarks and Distribution. This species mostly occurs in the upper Midwest, however scattered records are available from Pennsylvania west to Nebraska and Colorado south to Arkansas and Kentucky ( Nelson 2000, Zuellig et al. 2006). Mature larvae of this species can be separated from the closely related P. dorsata by the presence of a convex lateral bulge that does not exceed the level of the pronotal projections ( Figs. 40 , 41 , 44 ) and the approximate triangular shape of the rearward projecting process on sternum 9 of male larvae, the resulting angle=63.91 ± 13.16 ( Figs. 38 , 43 ).

Material Examined. USA, Colorado: Sedgwick Co., South Platte River, Julesburg , N 40.9542, W 102.3872, 7 March 2008, 2 L, B. Heinold & E. Peachey ( CSUIC) ; Nebraska: Cherry Co., Niobrara River, Rt. 83, 9 April 1996, 2 L, B.C. Kondratieff & R.W. Baumann ( CSUIC) ; Deuel Co., South Platte River, Big Springs, Hwy 38, N 41.3889, W 102.0750, 7 March 2008, ♀, 3L, Exv, B. Heinold & E. Peachey ( CSUIC) ; Hall Co., Platte River, Grand Island, Mormon State Park , 10 April 1996, ♂, ♀, 2 Exv, B.C. Kondratieff & R.W. Baumann, reared 20 April 1996 ( CSUIC) ; Hayes Co., Frenchman River, Rt. 6 W of Hamlet, 19 February 1994, 2♂, 2 Exv, reared 26 March 1994, B.C. Kondratieff & H. Rhodes ( CSUIC) ; Same as previous, ♂, ♀, 2 Exv ( CSUIC) ; Red Willow Co., Republican River , 1 mi. S of Perry, 19 February 1994, ♂, Exv, reared 26 March 1994, B.C. Kondratieff & H. Rhodes ( CSUIC) ; Same data as previous, ♂, ♀ , Exv , reared 28 March 1994 ( CSUIC) ; Thomas Co., Dismal River , Rt. 83, 9 April 1996, ♂, ♀, L, 2 Exv, B.C. Kondratieff & R.W. Baumann ( CSUIC) ; Middle Loup River, Jct. Rts. 2 and 83, 9 April 1996, ♂, Exv, B.C. Kondratieff & R.W. Baumann ( CSUIC) ; Wisconsin: Dunn Co., Red Cedar River, Sand Creek at CR-V, N 45.1683, W 91.6874, 21 March 2011, ♂, Exv, R.E. DeWalt & M. Pessino, reared 6 May 2011 ( INHS) ; Same as previous, ♂, Exv, reared 9 May 2011 ( INHS) .

Figures

Fig. 37-40. Pteronarcys pictetii. 37. Abdomen dorsal view; Nebraska: Hall Co., Platte River. 38. Abdomen ventral view; Wisconsin: Dunn Co., Red Cedar River. 39. Supra-antennal process; Nebraska: Hall Co., Platte River. 40. Pronotum dorsal view; Nebraska: Hall Co., Platte River.

Fig. 41-42. Pteronarcys pictetii. 41. Pronotum dorsal view; Nebraska: Red Willow Co., Republican River. 42. Pronotum dorsal view, Wisconsin: Dunn Co., Red Cedar River.

Fig. 43. Pteronarcys pictetii. Process of male sternum 9; Nebraska, Deuel Co., South Platte River.

Fig. 44. Pteronarcys pictetii. Larval habitus; Nebraska: Deuel Co., South Platte River.