Stonefly Species Allocapnia nivicola (Little Snowflies)

Source: Epiproct And Dorsal Process Structure In The Allocapnia Forbesi Frison, Allocapnia Pygmaea (Burmeister), And Allocapnia Rickeri Frison Species Groups (Plecoptera: Capniidae), And Inclusion Of Allocapnia Minima (Newport) In A New Species Group

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 mid-length; 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). Tri-lobed 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 tri-lobed; 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).