Soyedina merritti Baumann & Grubbs, 1996

Grubbs, Scott A. & Baumann, Richard W., 2019, Soyedina Ricker, 1952 (Plecoptera: Nemouridae) in the eastern Nearctic: review of species concepts, proposed morphology-based species groups, and description of a new species from North Carolina, Zootaxa 4658 (2), pp. 223-250 : 234

Soyedina merritti Baumann & Grubbs, 1996

Powdermill Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:606 0

( Figs. 35–42 , 80 )

Soyedina merritti Baumann & Grubbs 1996:221 . Holotype ♂ (USNM), Maul Spring , Powdermill Nature Reserve, Westmore- land Co., Pennsylvania, USA

Distribution. USA: PA ( DeWalt et al. 2019).

Material examined. USA, Pennsylvania, Somerset Co., spring into Jones Mill Run, Forbes State Forest , 40.05019, -79.263869, 16 April 1999, S.A. Grubbs, 4 males, 3 females ( WKUC) ; Westmoreland Co., seep into Powdermill Run, Powdermill Nature Reserve , 40.13729, -79.25851, 1 April 1995, S.A. Grubbs, 4 males, 5 females (paratypes, WKUC) ; seep into Indian Creek, PA 381, Forbes State Forest , 40.09207, -79.33244, 22 March 1998, S.A. Grubbs, 1 male, 1 female ( WKUC) .

Remarks. Adults were described in Baumann & Grubbs (1996); the larva remains undescribed. The combination of the asymmetric dorsal ( Figs. 35–37, 40 ) and ventral sclerites ( Figs. 35–36 ), plus the inner epiproct member that is flanged and directed laterally with the flange lip approximately same width apically ( Figs. 36–38 ), aligns this species closely with S. carolinensis and S. washingtoni .

Soyedina merritti is known only from a small geographic area along the Appalachian Plateau Province in southwestern Pennsylvania ( Fig. 80 ).

Figures

FIGURE 80. Distribution maps of eastern Nearctic Soyedina based on material examined during this study plus valid literature data. 80, S. carolinensis, S. merritti, and S. washingtoni.

FIGURES 35–42. Soyedina merritti. 35–38, 40–41: USA, Pennsylvania, seep into Powdermill Run; 39, 42: USA, Pennsylvania, seep into Indian Creek. 35, epiproct, ventral view, 150X; 36, epiproct, ventral view, 250X; 37, epiproct apex, ventral view, 650X; 38, epiproct apex, dorsal view, 550X; 39, epiproct, lateral view, 270X; 40, epiproct, caudal view, 220X; 41, outer paraproct lobe, lateral view, 180X; 42, outer paraproct lobe, lateral view, 250X. ds = dorsal sclerite, vs = ventral sclerite, im = inner member.