Prostoia completa ( Walker, 1852 )

Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, Zootaxa 5306 (1), pp. 1-53 : 22-24

9. Prostoia completa ( Walker, 1852)

Central Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:6101

( Figs. 5 , 61‒68 )

Nemoura completa Walker 1852:191 . Holotype male (British Natural History Museum), Nova Scotia, Canada

Nemoura glabra (in part): Claassen, 1923:281. Syn. Illies, 1966:221

Nemoura glabra (in part): Needham and Claassen, 1925:202

Nemoura completa: Ricker, 1938:133

Nemoura completa: Claassen, 1940:53

Nemoura completa: Harden & Mickel, 1952:16

Nemoura (Prostoia) completa: Ricker, 1952:49

Prostoia completa: Illies, 1966:221

Nemoura (Prostoia) completa: Harper & Hynes, 1971:1138

Prostoia completa: Zwick, 1973:346

Nemoura (Prostoia) completa: Hitchcock, 1974:97

Prostoia completa: Grubbs et al., 2014:15

Prostoia completa: Stark, 2017:214

Distribution. Canada: NB, NS, NF, ON, PE, PQ. USA: AL, AR, DE, GA, IA, IL, IN, KY, MA, MD, ME, MI, MN, MO, MS, NC, NY, OH, OK, PA, SC, TN, VA, WI, WV ( DeWalt et al. 2022)

Male. Macropterous.Body length 4.1–5.9 mm, forewing length 6.0– 7.2 mm (n= 7). Gills absent.Cerci simple and unmodified ( Figs. 61–62 ). Paraprocts with lightly sclerotized, undivided lobes. Epiproct ventral sclerite sclerotized throughout length, narrow in both dorsal and lateral profiles, and fully recurved over abdomen ( Figs. 61–63 ); base parallel-sided for ca. ⅓ of length ( Figs. 61, 66 ), tip slightly deflected upward and subtruncate apically ( Figs. 64–65 ); dorsal sclerite reduced to lateral arms in basal area ( Figs. 66–67 ), which are short and sickle-shaped ( Fig. 67 ).

Female. Macropterous. Body length 4.9–7.6 mm, forewing length 6.7–7.5 mm (n = 9). Gills absent. Cerci simple and unmodified. The 7 th and 8 th sterna fused medially ( Fig. 68 ); the 8 th sternum is modified slightly as a subgenital plate, with faint medial excavation and scarcely developed posterolateral corners ( Fig. 68 ).

Larva. Described by Harper & Hynes (1971). Stewart & Stark (2002) provided a full habitus illustration. Partial illustrations are also available in Stark (2017).

Comments. Prostoia completa is a widely distributed species in the eastern US and southeastern Canada plus westward across the Mississippi River to Iowa and Minnesota ( DeWalt et al. 2022). The Iowa specimens, however, require reexamination to be certain. Grubbs et al. (2014) proposed that the Interior Highland populations of P. completa from Arkansas, Missouri, and Oklahoma plus southern Illinois refer to P. ozarkensis . These two species are morphologically similar, exhibiting subtle differences with the epiproct dorsal and ventral sclerites. The females, however, cannot be differentiated morphologically.

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 61‒68. Prostoia completa. 61, USA, Wisconsin, Plover River, epiproct, dorsal view; 62, male abdominal terminalia, lateral view; 63, USA, Wisconsin, Plover River, epiproct, lateral view; 64, USA, Wisconsin, Plover River, epiproct apex, dorsolateral view; 65, USA, Wisconsin, Plover River, epiproct apex, dorsal view; 66, epiproct base, dorsal view, USA, Virginia, Roanoke River; 67, Canada, Newfoundland, Walsh River, epiproct base, lateral view; 68, USA, Kentucky, Trammel Fork, female, abdominal terminalia, ventral view. c = cercus, la = lateral arm, sgp = subgenital plate, vs = ventral sclerite.