Alloperla furcula Surdick

(Figs. 1-6)

Alloperla furcula Surdick, 1981:349 .

Holotype ♂ (United States National Museum), Upper Three Runs Creek, Aiken Co., South Carolina

Alloperla furcula: Surdick, 2004:15 . Redescription

Material examined. SC: Aiken Co., Upper Three Runs Creek, Savannah River Plant , 1 April 1977, Herlong, Prichard, 5 ♂ (BPS) . Same location, 4 May 1977, Herlong, Prichard, 10 ♂, 4 ♀ (BPS) . Aiken Co., Tinker Creek, Savannah River Plant , 1 June 1977, Herlong, Prichard, 1 ♂, 6 ♀ (BPS) .

Epiproct. Length from base to fork, ca. 146 μm. Greatest pre-apical width, ca. 27 μm; apical width, ca. 53 μm. Cowl reaching well beyond apical third of epiproct tip (Figs. 1-2). Dorsum of epiproct bare in apical third but basal two thirds bearing a sparse covering of appressed setae and a few long setae with freely curled tips (Figs. 2-3, 6); subapical area of epiproct bearing lateral rows of long, ventrolaterally directed setae (Figs. 3-5). Dorsal aspect of epiproct becoming slightly wider from basal fusion with cowl to abrupt subapical narrowing. Strong laterally directed arms of apical fork present a “fish tail” appearance (Figs. 2-3).