Podmosta macdunnoughi ( Ricker, 1947 )

Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, Zootaxa 5306 (1), pp. 1-53 : 18-19

8. Podmosta macdunnoughi ( Ricker, 1947)

Maritime Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:6113

( Figs. 4 , 55‒60 )

Nemoura macdunnoughi Ricker 1947:403 . Holotype male (Canadian National Collection), Baddeck , Cape Breton Island, Nova Scotia, Canada

Nemoura (Podmosta) macdunnoughi: Ricker, 1952:42

Podmosta macdunnoughi: Illies, 1966:219

Nemoura (Podmosta) macdunnoughi: Harper & Hynes, 1971:1137

Nemoura (Podmosta) macdunnoughi: Hitchcock, 1974:100

Distribution. Canada: LB, NB, NF, NS, PE, PQ. USA: ME, MN, NY ( DeWalt et al. 2022)

Male. Macropterous. Body length 4.0– 4.8 mm, forewing length 4.7–4.9 mm (n = 3). Gills absent. Cerci simple and unmodified ( Figs. 55‒56 ). Paraprocts undivided as a lightly sclerotized triangular lobe. Epiproct short and complex, anteriorly-recurved fully over abdomen ( Figs. 55‒57 ); dorsal sclerite broadly rounded basally ( Figs. 56‒ 58 ), extending anteriorly as paired lobes sparsely covered by small spinules ( Figs. 56‒58 ) and dorsally as short bifurcated lateral arms ( Figs. 57‒58 ); ventral sclerite narrow basally, laterally expanded in apical ½, overall t-shaped anteriorly, medially concave ( Figs. 56‒57 ).

Female. Macropterous. Body length 5.4–6.5 mm, forewing length 4.8–5.9 mm (n = 6). Gills absent. Cerci simple and unmodified ( Figs. 59‒60 ). Subgenital plate of 8 th tergum scarcely extending over anterior margin of 9 th tergum, with a dark sclerotized medial band that is apically concave ( Figs. 59‒60 ). The 7 th sternum is membranous and barely produced over the anterior margin of the 8 th tergum ( Figs. 59‒60 ).

Larva. Described by Harper & Hynes (1971). Ricker (1947) also provided a partial illustration.

Comments. Podmosta macdunnoughi is the only species of this Holarctic genus distributed in eastern North America ( DeWalt et al. 2022).

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 55‒60. Podmosta macdunnoughi. 55, Canada, Labrador, male abdominal terminalia, dorsal view; 56, Canada, Quebec, Jacques Cartier River, epiproct, dorsal view; 57, Canada, Quebec, Jacques Cartier River, epiproct, dorsal view; 58, Canada, Quebec, Jacques Cartier River, epiproct, lateral view; 59, Canada, Labrador, female abdominal terminalia, ventral view; 60, Canada, Nova Scotia, Roop Brook, female abdominal terminalia, ventral view. c = cercus, ds = dorsal sclerite, la = lateral arm, sgp = subgenital plate, vs = ventral sclerite.