22. Soyedina vallicularia (Wu, 1923)

Valley Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:6084

(Figs. 145–150)

Nemoura vallicularia Wu 1923:58 . Holotype male ( Cornell University Insect Collection), Ithaca, (Tompkins Co.), New York, USA

Nemoura vallicularia Needham & Claassen, 1925:215

Nemoura (Soyedina) vallicularia Ricker, 1952:53

Soyedina vallicularia Illies, 1966:248

Soyedina vallicularia Zwick, 1973:357

Nemoura (Soyedina) vallicularia Hitchcock, 1974:110

Soyedina vallicularia Baumann, 1975:67

Soyedina vallicularia Stewart & Stark, 1988:188

Soyedina vallicularia Stewart & Stark, 2002:215

Soyedina vallicularia Grubbs, 2006:40

Soyedina vallicularia Stewart & Stark, 2002:215

Soyedina vallicularia Stark, 2017:215

Soyedina vallicularia Grubbs & Baumann, 2019:227

Distribution. Canada: LB, NS, ON, PQ. USA; CT, IA, IL, IN, KY, MA, MD, ME, MI, NY, OH, PA, TN, VA, WI, WV (DeWalt et al. 2022)

Male. Macropterous. Body length 4.7–5.1 mm, forewing length 6.8–8.1 mm (n = 16). Gills absent. Cerci simple and unmodified. Paraprocts with two lobes, inner lobes lightly sclerotized and inconspicuous, outer lobes sclerotized, in basal half bulbous, tapered and straight-sided in apical half (Fig. 149). Epiproct asymmetric, typical for genus (Fig. 145); ventral sclerites partially recurved over abdomen, distinctly asymmetric, apically narrowly triangular (Fig. 145); dorsal sclerites distinctly asymmetric, appearing scaly at higher magnifications (Figs. 145‒ 148); open apically, inner member heavily sclerotized, flanged apically, lip asymmetric with apical half longer than basal portion (Figs. 145‒146).

Female. Macropterous. Body length 5.7–8.2 mm, forewing length 7.8.– 9.7 mm (n = 20). Gills absent. Cerci simple and unmodified. Subgenital plate well-developed, subtriangular in shape; base broad, extending from posterior of seventh sternum entirely over eighth sternum and approximately ¼ over ninth sternum; terminating in broadly-rounded apex (Fig. 150).

Larva. Described in full (see Stewart & Stark 2002 and all references therein).

Comments. Soyedina vallicularia is the most widespread amongst the eastern Nearctic Soyedina, including the Appalachian Mountains, Great Lakes region, and Ohio River and upper Mississippi River basins (Grubbs & Baumann 2019).