Allocapnia sandersoni Ricker, 1952

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 : 72

Allocapnia sandersoni Ricker

( Figs. 103-108 )

Allocapnia sandersoni Ricker 1952:165 .

Holotype ♂ (Illinois Natural History Survey), Clear Creek, 2.5 miles N Fayetteville , Washington Co., Arkansas

Allocapnia sandersoni: Ross & Ricker, 1971:40 .

Material examined. Arkansas: Searcy Co., Little Red River, Hwy 65, 4 January 1997, B. Stark, S. Tucker, 1♂, 2♀ ( BPS) .

Male epiproct. Apical segment of upper limb ca. 286 μm long and armed on the apical ca. 202 μm with dense patch of wave-like spikes ( Figs. 103-106 ); apical segment ca. 142 μm wide at base and slightly swollen to ca. 164 μm near base of armature; armed area gradually narrowed to a rounded tip. Basal segment of upper limb ca. 572 μm long and ca. 111 μm wide near midlength; basal segment bears a shallow, longitudinal groove extending to near base of apical segment. Greatest width of lower limb ca. 198 μm; marginal area near spoon lined with sparse row of long setae.

Male tergal process. Prominent raised, narrowly divided process on abdominal tergum 8 ( Figs. 106- 108 ). Process on tergum 8 ca. 214 μm wide and covered with scale-like structures; median notch of process ca. 36 μm wide.

Figures

Figs. 103-108. Allocapnia sandersoni, Little Red River, Searcy Co., Arkansas. 103. Male terminalia, dorsal. 104. Apical segment upper limb of epiproct tip, dorsal. 105. Male terminalia, lateral. 106. 8th tergal process and epiproct tip, lateral. 107. 8th tergal process and epiproct tip, dorsal. 108. 8th tergal process, anterodorsal.