Allocapnia ozarkana Ross, 1964

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 : 53

Allocapnia ozarkana Ross

( Figs. 25-30 )

Allocapnia ozarkana Ross 1964:172 .

Holotype ♂ (Illinois Natural History Survey), Cannon Creek , Madison Co., Arkansas

Allocapnia ozarkana: Ross & Ricker, 1971:34 .

Material examined. Arkansas: Johnson Co., East Fork Horsehead Creek, Hwy 103, 16 January 1999, B. Stark, 1♂ ( BPS) .

Male epiproct. Apical segment of upper limb ca. 183 μm long, swollen basolaterally but not bearing ear- like lobes; median field of apical segment bearing a patch of wave-like spikes ca. 150 μm long and divided along entire length by groove ( Figs. 25-28 ); greatest width of apical segment ca. 175 μm, narrowed to 58 μm at apex ( Fig. 26 ). Basal segment of upper limb ca. 343 μm long and ca. 97 μm wide at midlength; margins of basal segment lacking setae, median groove present, at least in basal half. Lower limb ca. 110 μm wide proximal to apical spoon.

Male tergal process. Prominent raised structures on abdominal terga 7 and 8 ( Figs. 25, 28-30 ). Process of tergum 7 ca. 72 μm wide and separated to base into a pair of small mounds ( Figs. 29-30 ); apices of lobes appear smooth. Process of tergum 8 ca. 188 μm wide and divided to base by gap ca. 50 μm wide ( Fig. 30 ); dorsal surface of lobes covered with scale-like structures.

Figures

Figs. 25-30. Allocapnia ozarkana, East Fork Horsehead Creek, Johnson Co., Arkansas. 25. Male terminalia, dorsal. 26. Apical segment upper limb of epiproct, dorsal. 27. Surface detail apical segment upper limb of epiproct, dorsal. 28. Epiproct apex and 8th tergal process, lateral. 29. Abdominal tergal lobes, dorsal. 30. Abdominal tergal lobes, anterodorsal.