Zapada katahdin Baumann & Mingo, 1987

Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, Zootaxa 5306 (1), pp. 1-53 : 47-48

26. Zapada katahdin Baumann & Mingo, 1987

Katahdin Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:5994

( Figs. 165‒168 )

Zapada katahdin Baumann & Mingo 1987:252 . Holotype male (United States National Museum), Katahdin Stream, Penobscot Co., Maine, USA

Nemoura (Zapada) sp.: Harper & Hynes, 1971:1140

Zapada katahdin: Grubbs et al., 2015:1319

Distribution. Canada: LB, NS, PQ. USA: ME, NH ( DeWalt et al. 2022)

Male. Macropterous. Body length 6.1–6.3 mm, forewing length 6.7–7.3 mm (n = 3). Four unbranched cervical gills are present. The L:MW ratio for the outer lateral gills is ca. 4.2 compared to ca. 5.2 for the inner medial gills ( Fig. 167 ; Grubbs et al. 2015). Cerci simple and unmodified ( Fig. 165 ). Paraprocts with two sclerotized lobes; inner lobes short and thin, outer lobe broadly quadrate. Epiproct recurved over 10 th tergite ( Figs. 165–166 ); broadest basally and slightly tapering to a truncate apex in dorsal view, revealing the large membranous area and the paired dorsal hooks ( Fig. 165 ); the dorsal sclerite and membranous area extend the entire length of the epiproct in lateral view ( Fig. 166 ); ventral sclerite broad at base but narrowed markedly to apex, nearly engulfed by dorsal sclerite along lateral margins, bearing an irregular row of stout spines.

Female. Macropterous. Body length 7.5–9.1 mm, forewing length 8.7–9.6 mm (n = 5). The 7 th sternum is enlarged as a subtruncate plate extending well over 8 th sternum; posterior margin of 8 th sternum slightly concave medially ( Fig. 168 ).

Larva. Full description and habitus illustration in Bauman & Mingo (1987). The brief description and partial illustrations by Harper & Hynes (1971) from Ungava, Quebec also refer to this species.

Comments. This is a northeastern Nearctic species, known from New Hampshire, Maine, and Nova Scotia northward to Labrador and Quebec ( Grubbs et al. 2015, DeWalt et al. 2022).

FIGURES NOTE: Some line drawings are missing specific location data due to details that were not present on the original illustrations.

Figures

FIGURES 165‒168. Zapada katahdin. 165, Canada, Labrador, Leg Lake, male terminalia, dorsal view; 166, USA, Maine, Katahdin Stream, epiproct, lateral view; 167, USA, Maine, Abol Stream, cervical gills, ventral view; 168, Canada, Labrador, tributary Beverly Lake, subgenital plate, ventral view. c = cercus, dh = dorsal hump, ds = dorsal sclerite, lg = lateral gill, ma = membranous area, mg = medial gill, sgp = subgenital plate.