Allocapnia nivicola (Fitch)

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 : 60

Allocapnia nivicola (Fitch)

( Figs. 55-60 )

Perla nivicola Fitch 1847:278 .

Lectotype ♂ (Museum of Comparative Zoology), unspecified location, designation by Frison, 1942:266.

Allocapnia nivicola: Hanson, 1942:83 .

Allocapnia nivicola: Ross & Ricker, 1971:49 .

Material examined. Kentucky: Jackson Co., Rock Lick Creek, Hwy 89, 10 February 1996, B.C. Kondratieff, R.F. Kirchner, 15♂ ( CSUC) . Tennessee: Lawrence Co., Factory Creek, Hwy 242, 28 February 2001, B.C. Kondratieff, R.F. Kirchner, R. E. Zuellig, 15♂, 4♀ ( CSUC). Perry Co., Buffalo River, Old Hwy 13, 28 February 2001, B.C. Kondratieff, R.F. Kirchner, R.E. Zuellig, 49♂, 30♀ ( CSUC) . Virginia: Montgomery Co., Tom’s Creek, Rt 655, 18 February 1981, B.C. Kondratieff, 2♂ ( BPS). Wythe Co. , East Fork Stony Fork Creek , Hwy 52, 28 December 1978 - 29 January 1979, R.F. Kirchner, 18♂ ( BPS) .

Male epiproct. Apical segment of upper limb ca. 340- 400 μm long, armed on apical ca. 140-165 μm with dense patch of wave-like spikes ( Figs. 55-57 ); apical segment ca. 110-150 μm wide at base, tapered to a broadly rounded tip. Basal segment of upper limb ca. 290-320 μm long and ca. 80-120 μm wide at midlength; basal segment with a moderately broad, shallow groove extending from base to apical segment base. Greatest width of lower limb ca. 173- 200 μm, and bearing a sparse, irregular row of marginal setae in apical half of limb ( Fig. 57 ).

Male tergal process. Prominent raised structures on abdominal terga 7 and 8 ( Figs. 58-60 ). Trilobed process on tergum 8 ca. 190-220 μm wide, and bearing a broad, shallow median notch interrupted by a median projection. Tergum 7 process much lower and not distinctly trilobed; both tergal processes covered on dorsum with scale-like structures; tergum 8 process with a deep, transverse groove on anterior face. In lateral aspect, lobes of 8 th tergal process appear thin and bent forward ( Fig. 60 ).

Figures

Figs. 55-60. Allocapnia nivicola, Tom’s Creek, Montgomery Co., Virginia. 55. Male terminalia, dorsal. 56. Apical segment upper limb of epiproct tip, dorsal. 57. Male terminalia, lateral. 58. Abdominal tergal processes, dorsal. 59. 8th tergal process, anterodorsal. 60. 8th tergal process, lateral.