Nemourinae, Billberg, 1820

Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, Zootaxa 5306 (1), pp. 1-53 : 5

publication ID

https://doi.org/ 10.11646/zootaxa.5306.1.1

publication LSID

lsid:zoobank.org:pub:21AD4F85-E313-47CB-BA98-9896D2B1DC05

DOI

https://doi.org/10.5281/zenodo.8056833

persistent identifier

https://treatment.plazi.org/id/07181030-DF28-FFA6-FF12-FF68FA18FA23

treatment provided by

Plazi

scientific name

Nemourinae
status

 

I. Adult key to eastern Nearctic Nemourinae View in CoL View at ENA 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 View FIGURES 157‒160 , 163 View FIGURES 161‒164 ); wing venation typical for family ( Fig. 8 View FIGURES 1‒8 ).... Zapada View in CoL

- Cervical gills absent; wing venation variable ( Figs. 1, 3, 7 View FIGURES 1‒8 ).................................................... 3

3 Veins A 1 and A 2 of forewing joined near posterior margin ( Fig. 7 View FIGURES 1‒8 ); epiproct either slightly ( Fig. 105 View FIGURES 105‒108 ) or markedly bilaterally asymmetric ( Fig. 115 View FIGURES 115‒122 )............................................................................ Soyedina View in CoL

- Veins A 1 and A 2 of forewing not joined ( Figs. 1‒6 View FIGURES 1‒8 ); epiproct bilaterally symmetric ( Figs. 31 View FIGURES 31‒36 , 44 View FIGURES 43‒48 , 61 View FIGURES 61‒68 )................... 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 View FIGURES 1‒8 ).................................................................. Paranemoura View in CoL

- Vesicle present on sternum 9; terminal costal crossvein of forewing joins R vein, typical “X” pattern at cord present ( Figs. 1‒2, 4‒6 View FIGURES 1‒8 )................................................................................................ 5

5 Cerci sclerotized and developed, either with lateral spines ( Figs. 10‒12 View FIGURES 9‒16 ) or elongated and recurved ( Figs. 37‒38 View FIGURES 37‒42 )......... 6

- Cerci simple and unmodified ( Figs. 51 View FIGURES 49‒54 , 86 View FIGURES 85‒92 )................................................................. 7

6 Cerci robust with paired appressed spines (= as; Figs. 9‒13 View FIGURES 9‒16 ) and one outer spine (= os), the latter may be apically forked ( Fig. 13 View FIGURES 9‒16 ) or not ( Figs. 12 View FIGURES 9‒16 )............................................................................ Nemoura View in CoL

- Cerci elongated and medially arcuate, apically pointed or bifurcated ( Figs. 19 View FIGURES 19‒24 , 25 View FIGURES 25‒30 , 31 View FIGURES 31‒36 , 37 View FIGURES 37‒42 ).................... Ostrocerca View in CoL

7 10 th tergum enlarged at lateral proximal corners into long, sclerotized spiny lobes ( Figs. 95‒96 View FIGURES 95‒98 )................... Shipsa View in CoL

- 10 th tergum unmodified at lateral proximal corners ( Figs. 45 View FIGURES 43‒48 , 161 View FIGURES 161‒164 )............................................... 8

8 Epiproct long and narrow throughout length, comprised mainly of the ventral sclerite, ( Figs. 61 View FIGURES 61‒68 , 69 View FIGURES 69‒76 , 77 View FIGURES 77‒84 , 85 View FIGURES 85‒92 ); dorsal sclerite reduced to lateral arms ( Figs. 67 View FIGURES 61‒68 , 82 View FIGURES 77‒84 , 88 View FIGURES 85‒92 ) or essentially absent ( Fig. 74 View FIGURES 69‒76 )..................................... Prostoia View in CoL

- Epiproct short and robust, ventral sclerite T-shaped and expanded laterally ( Figs. 56‒57 View FIGURES 55‒60 ); dorsal sclerite prominent and terminates as bifurcated lateral arms ( Figs. 57‒58 View FIGURES 55‒60 ).................................................... Podmosta View in CoL

9 Cervical gills present, either unbranched or 4-branched ( Figs. 155 View FIGURES 151‒156 , 159 View FIGURES 157‒160 ) wing venation typical for family ( Fig. 8 View FIGURES 1‒8 ).... Zapada View in CoL

- Cervical gills absent; wing venation variable ( Figs. 1, 3, 7 View FIGURES 1‒8 ) ... 10

10. Veins A 1 and A 2 of forewing joined near posterior margin ( Fig. 7 View FIGURES 1‒8 )......................................... Soyedina View in CoL

- Veins A 1 and A 2 of forewing not joined ( Figs. 1‒6 View FIGURES 1‒8 ).......................................................... 11

11 7 th sternum covering at least ¾ of 8 th sternum ( Figs. 17‒18 View FIGURES 17‒18 )............................................. Nemoura View in CoL

- 7 th sternum less produced, covering <½ of 8 th sternum ( Figs. 23 View FIGURES 19‒24 , 75 View FIGURES 69‒76 , 98 View FIGURES 95‒98 )......................................... 12

12 Terminal costal crossvein of forewing joins Sc vein before junction with R vein, typical “X” pattern at cord absent ( Fig. 3 View FIGURES 1‒8 )......................................................................................... .. Paranemoura View in CoL

- Terminal costal crossvein of forewing joins R vein, typical “X” pattern at cord present ( Fig. 1‒2, 4‒6 View FIGURES 1‒8 )................. 13

13 8 th sternum enlarged and modified as subgenital plate; 7 th sternum with a medial, nipple-like projection ( Figs. 24 View FIGURES 19‒24 , 30 View FIGURES 25‒30 , 35 View FIGURES 31‒36 ) (except O. truncata View in CoL , Fig. 42 View FIGURES 37‒42 ).................................................................... Ostrocerca View in CoL

- 8 th sternum not enlarged, only as medial subgenital plate or medial sclerotized pattern; 7 th sternum without medial, nipple-like projection ( Figs. 60 View FIGURES 55‒60 , 84 View FIGURES 77‒84 , 98 View FIGURES 95‒98 )............................................................................ 14

14 Subgenital plate apex broad, encompassing at least 50% of the total width of the 8 th sternum, varying from scarcely ( Figs. 68 View FIGURES 61‒68 , 84 View FIGURES 77‒84 ) to moderately ( Figs. 75 View FIGURES 69‒76 , 93 View FIGURES 93‒94 ) emarginate medially................................................... Prostoia View in CoL

- Subgenital plate apex comparatively smaller, encompassing much less than 50% of the total width of the 8 th sternum ( Figs. 60 View FIGURES 55‒60 , 98 View FIGURES 95‒98 )................................................................................................ 15

15 Subgenital plate with a distinct medial notch ( Fig. 59‒60 View FIGURES 55‒60 ).............................................. Podmosta View in CoL

- Subgenital plate lacking a distinct medial notch, rounded distally ( Fig. 98 View FIGURES 95‒98 ).................................... Shipsa View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Nemouridae

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF