Oemopteryx species

Verdone, Chris J., Williams, Bronwyn W., Beaty, Steven R., Holland, Victor B., Grubbs, Scott A. & Dewalt, Edward, 2025, The adults, larvae, and systematics of the Nearctic Oemopteryx Klapálek, 1902 (Plecoptera: Taeniopterygidae), Zootaxa 5595 (1), pp. 1-94 : 12-13

Oemopteryx species adult male key

1 Forewing brachypterous ( Figs 28A , 34A ), vesicle absent ( AS 9 in Figs 28C , 34C ).................................. 2

1’ Forewing macropterous ( Figs 8D , 15D , 21D , 40D , 45D ), vesicle present ( AS 9/V in Figs 8C , 15C , 21C , 40C , 45C )........ 3

2 Upturned portion of forewing>1/3 total wing length ( Fig. 28A circle inset); medial apical lobe of anterior epiproct>1/3 epiproct width (AEp in Figs 29A–B ); apical lobes of posterior epiproct divided by a deep furrow (PEp in Figs 29A–B ); free portion of sternum-9 with rounded lateral margins ventrally ( AS 9 in Fig. 28C ).................................................................. Oemopteryx fosketti ( Ricker, 1965) ( Canada: AB, SK, MB. USA: CO, UT, MT, ND, WY)

2’ Upturned portion of forewing <1/3 total wing length ( Fig. 34A circle inset); medial apical lobe of anterior epiproct <1/3 epiproct width (AEp in Figs 35A–B ); apical lobes of posterior epiproct not divided by a deep furrow (PEp in Figs 35A–B ); free portion of sternum-9 with straight lateral margins ventrally ( AS 9 in Fig. 34C )............................................. Oemopteryx glacialis ( Barnston, 1848) ( Canada: NB, NS, ON, QC. USA: CT, MA, MI, MN, NH, NY, VT, WI, WV)

3 Basal plate of tergum-10 with two prominent hemispherical lobes (BP in Figs 41A–B , 46A, C ); anterior prong of epiproct entire (AEp in Figs 41A–E , 46A–B )........................................................................... 4

3’ Basal plate of tergum-10 essentially flat (BP in Figs 9A–B , 16A, 16C , 22A, 22C ); anterior prong of epiproct apically divided (AEp in Figs 9A–B, 9E , 16A–B, 16E , 22A–B, 22E ).......................................................... 5

4 Anterior prong of epiproct broadly spatulate with a medial depression in dorsal aspect (AEp in Figs 46A–B ); basal cercal process anteriorly directed (BCP in Figs 46A, D )................... Oemopteryx vanduzeea ( Claassen, 1937) ( USA: CA)

4’ Anterior prong of epiproct with a hood-like tip (AEp in Figs 41A–E ); basal cercal process dorsally directed with a pointed, posteriorly directed apex (BCP in Figs 41A, 41D )........ Oemopteryx leei Baumann & Kondratieff, 2009 ( USA: CA, OR)

5 Paired anterior processes on tergum-10 present (AP in Figs 9A, 9C , 16A, 16C ).................................... 6

5’ Paired anterior processes on tergum-10 absent ( Figs 22A, 22C ); abdominal tergum-1 with a U-shaped pale area (AT 1 in Fig. 20B )...... Oemopteryx tuscarora sp. nov. Verdone, Beaty, Holland & Williams ( USA: NC; Sand Hills Level IV ecoregion)

6 Abdominal tergum-1 sclerotized with two submedial pale spots anteriorly, which may be contiguous medially (AT 1 in Fig. 7B )........ Oemopteryx bimaculata sp. nov. Verdone, Williams, Beaty & Holland ( USA: AL, GA, KY, TN, WV; Central & Southwestern Appalachians Level III ecoregions)

6’ Abdominal tergum-1 pale medially from anterior to posterior margin (AT 1 in Fig. 14B )............................................. Oemopteryx contorta ( Needham & Claassen, 1925) ( USA: CT, MA, MD, ME, NC, NH, PA, TN, VA, WV)

Figures

FIGURE 7. Oemopteryx bimaculata sp. nov., Hall Creek, Morgan Co., Tennessee, adults. A. Live male. B. Male tergum one, dorsal. C. Female tergum one, dorsal. [morphological abbreviations: see Table 1].

FIGURE 8. Oemopteryx bimaculata sp. nov. adults., A–C. Hall Creek, Morgan Co., Tennessee. A. Male habitus, dorsal. B. Female habitus, dorsal. C. Male sterna, ventral. D. Daniel Creek, Dade Co., Georgia, female wings. E–F. Hall Creek, Morgan Co., Tennessee. E. Female sterna, ventral. F. Female forewing, lateral. [morphological abbreviations: see Table 1].

FIGURE 9. Oemopteryx bimaculata sp. nov., Green Branch, Morgan Co., Tennessee, adult male. A. Terminalia, dorsal. B. Terminalia, close, dorsal. C. Abdominal terga, dorsal. D. Terminalia, lateral. E. Epiproct, lateral. [morphological abbreviations: see Table 1].

FIGURE 14. Oemopteryx contorta, Cove Creek, Tazewell Co., Virginia, adults. A. Live female. B. Male tergum one, dorsal. C. Female tergum one, dorsal. [morphological abbreviations: see Table 1].

FIGURE 15. Oemopteryx contorta, Cove Creek, Tazewell Co., Virginia, adults. A. Male habitus, dorsal. B. Female habitus, dorsal. C. Male sterna, ventral. D. Female wings. E. Female sterna, ventral. F. Female forewing, lateral. [morphological abbreviations: see Table 1].

FIGURE 16. Oemopteryx contorta, Pool Creek, Rutherford Co., North Carolina, adult male.A. Terminalia, dorsal.B. Terminalia, close, dorsal. C. Abdominal terga, dorsal. D. Terminalia, lateral. E. Epiproct, lateral. [morphological abbreviations: see Table 1].

FIGURE 20. Oemopteryx tuscarora sp. nov., Haystack Creek, Moore Co., North Carolina, adults. A. Live female. B. Male tergum one, dorsal. C. Female tergum one, dorsal. [morphological abbreviations: see Table 1].

FIGURE 21. Oemopteryx tuscarora sp. nov., Haystack Creek, Moore Co., North Carolina, adults. A. Male habitus, dorsal. B. Female habitus, dorsal. C. Male sterna, ventral. D. Female wings. E. Female sterna, ventral. F. Female forewing, lateral. [morphological abbreviations: see Table 1].

FIGURE 22. Oemopteryx tuscarora sp. nov., Haystack Creek, Moore Co., North Carolina, adult male. A. Terminalia, dorsal. B. Terminalia, close, dorsal. C. Abdominal terga, dorsal. D. Terminalia, lateral. E. Epiproct, lateral. [morphological abbreviations: see Table 1].

FIGURE 28. Oemopteryx fosketti, adults. A. Athabasca River, Athabasca Co., Alberta, Canada, male habitus, dorsal; forewing, lateral (circle inset). B. Colorado River, Grand Co., Utah, female habitus, dorsal. C. Athabasca River, Athabasca Co., Alberta, Canada, Male sterna, ventral. D–E. Colorado River, Grand Co., Utah. D. Female wings. E. Female sterna, ventral. F. Colorado River, Grand Co., Utah, Female forewing, lateral. [morphological abbreviations: see Table 1].

FIGURE 29. Oemopteryx fosketti, Delores River, Mesa Co., Colorado, adult male. A. Terminalia, dorsal. B. Terminalia, close, dorsal. C. Abdominal terga, dorsal. D. Terminalia, lateral. E. Epiproct, lateral. [morphological abbreviations: see Table 1].

FIGURE 34. Oemopteryx glacialis. A. Salmon River, Clinton Co., New York, male habitus, dorsal; forewing, lateral (circle inset). B. Saranac River, Clinton Co., New York, female habitus, dorsal. C. Salmon River, Clinton Co., New York, Male sterna, ventral. D–E. Saranac River, Clinton Co., New York. D. Female wings. E. Female sterna, ventral. F. Deer River, St. Lawrence Co., New York, Female forewing, lateral. [morphological abbreviations: see Table 1].

FIGURE 35. Oemopteryx glacialis, Lamoille River, Chittenden Co., Vermont, adult male. A. Terminalia, dorsal. B. Terminalia, close, dorsal. C. Abdominal terga, dorsal. D. Terminalia, lateral. E. Epiproct, lateral. [morphological abbreviations: see Table 1].

FIGURE 40. Oemopteryx leei, UT Butte Creek, Humboldt Co., California, adults. A. Male habitus, dorsal. B. Female habitus, dorsal. C. Male sterna, ventral. D. Female wings. E. Female sterna, ventral. F. Female forewing, lateral. [morphological abbreviations: see Table 1].

FIGURE 41. Oemopteryx leei, UT Butte Creek, Humboldt Co., California, adult male. A. Terminalia, dorsal. B. Terminalia, close, dorsal. C. Abdominal terga, dorsal. D. Terminalia, lateral. E. Epiproct, lateral. [morphological abbreviations: see Table 1].

FIGURE 45. Oemopteryx vanduzeea, UT Long Canyon, El Dorado Co., California, adults. A. Male habitus, dorsal. B. Female habitus, dorsal. C. Male sterna, ventral. D. Female wings. E. Female sterna, ventral. F. Female forewing, lateral. [morphological abbreviations: see Table 1].

FIGURE 46. Oemopteryx vanduzeea, adult male. A–B, D–E. UT Tuolumne River., Tuolumne Co., California. A. Terminalia, dorsal. B. Terminalia, close, dorsal. C. UT Mill Creek, Tehama Co., California, abdominal terga, dorsal. D. Terminalia, lateral. E. Epiproct, lateral. [morphological abbreviations: see Table 1].