Nemourinae Billberg 1820
Creators: name: Grubbs, Scott A.
name: Baumann, Richard W.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Nemouridae

description: I. Adult key to eastern Nearctic Nemourinae genera
(modified from Baumann 1975 and Stewart & Stark 2008)
1 Males .............................................................................................. 2
- Females............................................................................................. 9
2 Cervical gills present, either unbranched or 4-branched (Figs. 159, 163); wing venation typical for family (Fig. 8).... Zapada
- Cervical gills absent; wing venation variable (Figs. 1, 3, 7).................................................... 3
3 Veins A 1 and A 2 of forewing joined near posterior margin (Fig. 7); epiproct either slightly (Fig. 105) or markedly bilaterally asymmetric (Fig. 115)............................................................................ Soyedina
- Veins A 1 and A 2 of forewing not joined (Figs. 1‒6); epiproct bilaterally symmetric (Figs. 31, 44, 61)................... 4
4 Vesicle absent from sternum 9; terminal costal crossvein of forewing joins Sc vein before junction with R vein, typical “X” pattern at cord absent (Fig. 3).................................................................. Paranemoura
- Vesicle present on sternum 9; terminal costal crossvein of forewing joins R vein, typical “X” pattern at cord present (Figs. 1‒2, 4‒6)................................................................................................ 5
5 Cerci sclerotized and developed, either with lateral spines (Figs. 10‒12) or elongated and recurved (Figs. 37‒38)......... 6
- Cerci simple and unmodified (Figs. 51, 86)................................................................. 7
6 Cerci robust with paired appressed spines (= as; Figs. 9‒13) and one outer spine (= os), the latter may be apically forked (Fig. 13) or not (Figs. 12)............................................................................ Nemoura
- Cerci elongated and medially arcuate, apically pointed or bifurcated (Figs. 19, 25, 31, 37).................... Ostrocerca
7 10 th tergum enlarged at lateral proximal corners into long, sclerotized spiny lobes (Figs. 95‒96)................... Shipsa
- 10 th tergum unmodified at lateral proximal corners (Figs. 45, 161)............................................... 8
8 Epiproct long and narrow throughout length, comprised mainly of the ventral sclerite, (Figs. 61, 69, 77, 85); dorsal sclerite reduced to lateral arms (Figs. 67, 82, 88) or essentially absent (Fig. 74)..................................... Prostoia
- Epiproct short and robust, ventral sclerite T-shaped and expanded laterally (Figs. 56‒57); dorsal sclerite prominent and terminates as bifurcated lateral arms (Figs. 57‒58).................................................... Podmosta
9 Cervical gills present, either unbranched or 4-branched (Figs. 155, 159) wing venation typical for family (Fig. 8).... Zapada
- Cervical gills absent; wing venation variable (Figs. 1, 3, 7) ... 10
10. Veins A 1 and A 2 of forewing joined near posterior margin (Fig. 7)......................................... Soyedina
- Veins A 1 and A 2 of forewing not joined (Figs. 1‒6).......................................................... 11
11 7 th sternum covering at least ¾ of 8 th sternum (Figs. 17‒18)............................................. Nemoura
- 7 th sternum less produced, covering <½ of 8 th sternum (Figs. 23, 75, 98)......................................... 12
12 Terminal costal crossvein of forewing joins Sc vein before junction with R vein, typical “X” pattern at cord absent (Fig. 3)......................................................................................... .. Paranemoura
- Terminal costal crossvein of forewing joins R vein, typical “X” pattern at cord present (Fig. 1‒2, 4‒6)................. 13
13 8 th sternum enlarged and modified as subgenital plate; 7 th sternum with a medial, nipple-like projection (Figs. 24, 30, 35) (except O. truncata, Fig. 42).................................................................... Ostrocerca
- 8 th sternum not enlarged, only as medial subgenital plate or medial sclerotized pattern; 7 th sternum without medial, nipple-like projection (Figs. 60, 84, 98)............................................................................ 14
14 Subgenital plate apex broad, encompassing at least 50% of the total width of the 8 th sternum, varying from scarcely (Figs. 68, 84) to moderately (Figs. 75, 93) emarginate medially................................................... Prostoia
- Subgenital plate apex comparatively smaller, encompassing much less than 50% of the total width of the 8 th sternum (Figs. 60, 98)................................................................................................ 15
15 Subgenital plate with a distinct medial notch (Fig. 59‒60).............................................. Podmosta
- Subgenital plate lacking a distinct medial notch, rounded distally (Fig. 98).................................... Shipsa
description: Published as part of Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, pp. 1-53 in Zootaxa 5306 (1) on page 5, DOI: 10.11646/zootaxa.5306.1.1, http://zenodo.org/record/8054287