Allocapnia pygmaea (Burmeister)

Stark, Bill P. & Kondratieff, Boris C., 2012, Epiproct And Dorsal Process Structure In The Allocapnia Forbesi Frison, A. Pygmaea (Burmeister), And A. Rickeri Frison Species Groups (Plecoptera: Capniidae), And Inclusion Of A. Minima (Newport) In A New Species Group, Illiesia 8 (5), pp. 45-77 : 63

Allocapnia pygmaea (Burmeister)

( Figs. 67-72 )

Semblis pygmaea Burmeister 1839:874 .

Lectotype ♂ (Zoological Museum Berlin), Pennsylvania [no specific site], designation by Needham & Claassen, 1925:278.

Capnella pygmaea: Needham & Claassen, 1925:277 .

Allocapnia torontoensis Ricker 1935:257 .

Holotype ♂ (Canadian National Collection), Credit River, Cooksville , Peel Co., Ontario, synonymy proposed by Frison, 1942:265.

Allocapnia pygmaea: Ross & Ricker, 1971:45 .

Material examined. Kentucky: Leslie Co., Middle Fork Kentucky River, Daniel Boone Parkway , 8 February 1998, B. C. Kondratieff, R. F. Kirchner, 30♂, 8♀ ( CSUC). Powell Co., Middle Fork Red River, Hwy N, 10 February 1998, B.C. Kondratieff, R.F. Kirchner, 21♂, 6♀ ( CSUC) . New York: Tompkins Co., Salmon Creek, Myers , 26 February 2000, M.H. Alford, 23♂, 12♀ ( BPS). Tompkins Co. , Ithaca, Cascadilla Creek , Cornell University, 26 February 2000, M.H. Alford, 8♂, 3♀ ( BPS). Tompkins Co. , Owasco Inlet, Stevens Rd, near Groton, 26 February 2000, M.H. Alford, 6♂, 2♀ ( BPS) . West Virginia: Mason Co., Ohio River, Apple Grove , 3 March 2001, B.C. Kondratieff, R.F. Kirchner, R.E. Zuellig, 5♂, 4♀ ( CSUC) .

Male epiproct. Apical segment of upper limb ca. 340- 400 μm long, armed on apical ca. 176-220 μm with dense patch of wave-like spikes ( Figs. 67-69 ); apical segment ca. 125-135 μm wide at base, tapered to a narrow, rounded tip. Basal segment of upper limb ca. 303-309 μm long and ca. 79-103 μm wide at midlength; basal segment with median groove narrowed toward base of apical segment ( Fig. 67 ). Greatest width of lower limb ca. 148-194 μm; lower limb bearing a sparse, marginal row of long setae in apical third ( Fig. 69 ).

Male tergal process. Prominent raised structure on abdominal tergum 8 ( Figs. 70-72 ). Bilobed process on tergum 8 ca. 162-174 μm wide and bearing a deep Ushaped mesal notch; notch width ca. 44-56 μm. Lobes of process diverge in dorsal aspect, but appear straight and slightly swollen in lateral aspect; lobes covered with scale-like structures; anterior face bearing a shallow, transverse groove.

Figures

Figs. 67-72. Allocapnia pygmaea, Ohio River, Mason Co., West Virginia. 67. Male terminalia, dorsal. 68. Apical segment upper limb of epiproct tip, dorsal. 69. Male terminalia, lateral. 70. 8th tergal process, oblique lateral. 71. 8th tergal process, anterodorsal. 72. 8th tergal process, dorsal.