Taeniopterygidae (Adults)

Stark, Bill P. & Hicks, Matthew B., 2009, The Taeniopterygidae Of Mississippi (Insecta: Plecoptera), Illiesia 5 (9), pp. 85-98 : 86-87

Key to Species of Mississippi Taeniopterygidae (Adults)

1 Tip of abdomen with an upright, probe-like epiproct, or sternum 9 prolonged and bent sharply upward near tip ( Fig. 8 ) …….… Males (2)

1’ Tip of abdomen without probe-like structures or a greatly prolonged, bent process on sternum 9 ………………………………………..…. Females (7)

2 Cerci multisegmented; sternum nine prolonged beyond tip of abdomen and bent sharply upward near apex ( Fig. 8 ) ………...… Strophopteryx fasciata

2’ Cerci one-segmented; sternum nine not prolonged ( Fig. 10 ) …………….... Taeniopteryx (3)

3 Abdominal sternum nine bearing a vesicle ( Fig. 10 ) ..…………………………………………..….... 4

3’ Abdominal sternum nine without a vesicle …... 5

4 Hind femur bearing a prominent, acute spur at mid length ( Fig. 12 ); paraprocts as in Fig. 18 … ……………………………………..…….... T. maura

4’ Hind femur bearing a low, rounded callus at mid length; paraprocts as in Fig. 13 .....…….. T. burksi

5 Apical section of paraprocts, slender, acute and bent sharply outward near tip ( Fig. 19 ) ……… T. parvula

5’ Apical section of paraprocts, broadly rounded or truncate and not hooked outward at tip ( Figs. 15, 17 ) …………………………………………………. 6

6 Extruded aedeagus with small dorsal lobes, or dorsal lobes absent; cercal length greater than basal width ( Fig. 16 ); outer margins of paraprocts apically expanded ( Fig. 17 ) ………...… T. lonicera

6’ Dorsal lobes of extruded aedeagus similar to ventral lobes; cercal length subequal to basal width ( Fig. 14 ); outer margins of paraprocts hardly expanded apically ( Fig. 15 ) ….…..…. T. lita

7 Posterior margin of abdominal sternum 9 prolonged as a narrow, tongue shaped process extending over all, or much of sternum 10 ( Fig. 9 ) …………………………….... Strophopteryx fasciata

7’ Posterior margin of abdominal sternum 9 not prolonged ( Fig. 11 ) ………………. Taeniopteryx (8)

8 Subgenital plate of sternum 8 bearing a U-shaped margin ( Figs. 21-22 ) ..……………………….....… 9

8’ Subgenital plate bearing a V-shaped margin, or plate margin indistinct ( Figs. 11 , 20 ) …..……... 10

9 U-shaped margin of subgenital plate usually complete around anterior margin ( Fig. 22 ) …………. T. lonicera

9’ U-shaped margin of subgenital plate usually with a small anteromedian notch ( Fig. 21 ) ..…... T. lita

10 V-shaped margin of subgenital plate dark and acute anteriorly, area lateral to V-margin usually pale ( Fig. 23 ) ………………………..…… T. parvula

10’ V-shaped margin of subgenital plate usually incomplete or indistinct anteriorly, area lateral to V-margin usually lightly sclerotized ( Figs. 11 , 20 ) ………………………………….... T. burksi , T. maura

(Larvae)

Modified from Fullington & Stewart (1980)

1 Coxae without gills; abdominal sternum 9 bearing a triangular, caudal projection ……………………. ………………………………... Strophopteryx fasciata

1’ Each coxa with a single, segmented or telescoping gill; abdominal sternum 9 without triangular projection ………………………… Taeniopteryx (2)

2 Dorsum of abdomen and thorax without median pale band ……………………………….. T. parvula

2’ Dorsum of abdomen and thorax with a median pale band ………………………………………….. 3

3 Mid-dorsal pale band bordered by dark brown pigment; abdominal terga armed with slender bristles of variable length ………………………… 4

3’ Mid-dorsal pale band without dark brown border; bristles on abdominal terga mostly long and curved ……………………………………...… 5

4 Last instar male larvae with spur evident on hind femora ………………………………….… T. maura

4’ Last instar male larvae without obvious spur on hind femora ……………………………… T. burksi

5 Body length of last instar larvae less than 7.6 mm ……………………………………..…..... T. lonicera

5’ Body length of last instar larvae at least 8.0 mm ………….......................................................… T. lita

Figures

Figs. 8-12. Taeniopterygid structures. 8-9. Strophopteryx fasciata. 8. Male terminalia, lateral aspect. 9. Female terminalia, ventral aspect. 10-12. Taeniopteryx maura. 10. Male terminalia, ventral aspect. 11. Female terminalia, ventral aspect. 12. Male hind femur. (Ep = epiproct, Ce = cercus, Vs = vesicle, St9 = sternum 9, St8 = sternum 8)

Figs. 13-19. Taeniopteryx male structures. 13. T. burksi male paraproct, ventral. 14. T. lita male terminalia, dorsal. 15. T. lita male paraproct, ventral. 16. T. lonicera male terminalia, dorsal. 17. T. lonicera male paraproct, ventral. 18. T. maura male paraproct, ventral. 19. T. parvula male paraproct, ventral. (Pp = paraproct)

Figs. 20-23. Taeniopteryx female sternum 8. 20. T. burksi. 21. T. lita. 22. T. lonicera. 23. T. parvula.