Zapada fumosa Baumann & Grubbs, 2015

Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, Zootaxa 5306 (1), pp. 1-53 : 46-47

25. Zapada fumosa Baumann & Grubbs, 2015

Fumose Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:470810

( Figs. 8 , 161–164 )

Zapada fumosa Baumann & Grubbs 2015:1315 . Holotype male (United States National Museum), Walker Camp Prong , Great Smoky Mountain National Park, Sevier Co., Tennessee, USA

Zapada species A : Stark, 2017:214.

Distribution. USA: NC, TN, VA ( DeWalt et al. 2022)

Male. Macropterous. Body length 5.5–6.0 mm, forewing length 4.0– 4.5 mm (n = 5, in Grubbs et al. 2015). Four 4-branched cervical gills are present; each gill complex is comprised of three well-developed medial branches and one reduced lateral branch ( Fig. 163 ). L:MW ratios are 6.3–6.5 for three medial branches and 2.1 for the singular lateral branch ( Grubbs et al. 2015). Cerci simple and unmodified ( Fig. 161 ). Paraprocts with two sclerotized lobes; inner lobes short and thin, outer lobe broadly quadrate. Epiproct recurved over 10 th tergite ( Figs. 161–162 ); broadest basally and slightly tapering to a rounded apex in dorsal view, revealing the narrowly-triangular shaped membranous area ( Fig. 161 ); inner member lined with a row of laterally-directed spines except at apex ( Figs. 161–162 ); subtriangular in shape in lateral view, showing the broadly-rounded membranous structure mesally ( Fig. 162 ); dorsal sclerite larger than the ventral sclerite in lateral view, the two structures run ca. parallel from base nearly to mid-point ( Fig. 162 ).

Female. Macropterous. Body length 7.0–8.0 mm, forewing length 5.5–6.0 mm (n = 5, in Grubbs et al. 2015). Cervical gills same as male. The 7 th sternum is enlarged as a broadly rounded, subtriangular subgenital plate extending minimally to anterior margin of 8 th sternum ( Fig. 164 ); posterior margin of 8 th sternum slightly concave medially.

Larva. Undescribed. Adult gill characteristics of Zapada , however, are identical to those in the larval stage. This should permit positive identification of larva of this species ( Stark 2017).

Comments. Zapada fumosa is distributed in the southern Appalachian Highlands region from southwestern Virginia, east Tennessee, and western North Carolina, known mainly from streams draining remnant boreal forests of red spruce ( Picea rubens Sargent, 1898 ) and Frasier fir ( Abies fraseri Pursh, 1817 ) ( Grubbs et al. 2015).

Figures

FIGURES 1‒8. Forewing images. 1, Nemoura arctica, USA, Michigan, Silver Creek; 2, Ostrocerca albidipennis, USA, West Virginia, Middle Fork Indian Run; 3, Paranemoura perfecta, USA, West Virginia, headwaters Sugar Creek; 4, Podmosta macdunnoughi, USA, New York, Grampus Brook, dark line at tips of arrows represent the termini of veins A1 and A2; 5, Prostoia completa, USA, Kentucky, Middle Fork Drakes Creek; 6, Shipsa rotunda, USA, Michigan, Montreal River; 7, Soyedina calcarea, USA, Kentucky, tributary Green River; 8, Zapada katahdin, Canada, Labrador, tributary Leg Lake.

FIGURES 161‒164. Zapada fumosa. 161, USA, Virginia, Lewis Fork, male terminalia, dorsal view; 162, USA, Virginia, Lewis Fork, epiproct, lateral view; 163, USA, Virginia, Lewis Fork, cervical gills, ventral view; 164, USA, Virginia, Lewis Fork, subgenital plate, ventral view. c = cercus, ds = dorsal sclerite, imb = inner medial branch, lb = lateral branch, ma = membranous area, mmb = medial medial branch, omb = outer medial branch, sgp = subgenital plate, vs = ventral sclerite.