19. Soyedina merritti Baumann & Grubbs, 1996

Powdermill Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:6060

(Figs. 129–134)

Soyedina merritti Baumann & Grubbs 1996:221 . Holotype male (United States National Museum), Maul Spring, Powdermill Nature Reserve, Westmoreland Co., Pennsylvania, USA

Soyedina merritti Grubbs & Baumann, 2019:234

Distribution. USA: PA (DeWalt et al. 2022)

Male. Macropterous. Body length 5.0–7.0 mm, forewing length 6.7–7.4 mm (n = 5). Gills absent. Cerci simple and unmodified. Paraprocts with two lobes, inner lobes lightly sclerotized and inconspicuous, outer lobes sclerotized, subtriangular in shape, slightly tapered apically to an anteriorly-directed spur (Fig. 133). Epiproct asymmetric, typical for genus (Fig. 129); ventral sclerites partially recurved over abdomen, distinctly asymmetric, apically narrowly triangular (Fig. 129); dorsal sclerites distinctly asymmetric, appearing scaly at higher magnifications (Figs. 130‒ 132); open apically, inner member heavily sclerotized, flanged apically, lip symmetric apically (Figs. 130‒131).

Female. Macropterous. Body length 5.7–7.8 mm, forewing length 7.9–9.3 mm (n = 8). 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. 134).

Larva. Undescribed.

Comments. Soyedina merritti is known only from a small geographic area along the Appalachian Plateau Province in southwestern Pennsylvania (Baumann & Grubbs 2006, Grubbs & Baumann 2019).