Neotrichia caxima

Harris, Steven C. & Rasmussen, Andrew K., 2010, The Neotrichia caxima Group (Trichoptera: Hydroptilidae) in the southeastern United States, Zootaxa 2608, pp. 25-44 : 42-43

Key to males and females of the Neotrichia caxima Group in the southeastern United States

1. Males........................................................................................................................................................................... 2

- Females ....................................................................................................................................................................... 9

2. Phallus with single, internal sclerotized rod apically, apex beak-like ( Fig. 1 D) .................................... N. mobilensis

- Phallus with pair of internal sclerotized rods apically, subapically without sclerotized projection ( Figs 7 D, 15D).. 3

3. Inferior appendages bifid apically in lateral view ( Fig. 3 A); tergum X deeply incised distally ( Fig. 3 C); phallus apex narrowing abruptly ( Fig. 3 D) .......................................................................................................................... N. falca

- Inferior appendages entire apically in lateral view ( Figs. 5 A, 7A, 11A); tergum X only slightly incised distally ( Fig. 5 C), or rounded ( Fig. 9 C); phallus apex not narrowing abruptly ( Fig. 5 D)................................................................ 4

4. Inferior appendages in ventral view truncate ( Fig. 5 B) or rounded distally ( Fig.7 B) ................................................. 5

- Inferior appendages in ventral view triangular distally ( Figs 9 B, 11B) ..................................................................... 6

5. Inferior appendages in ventral view truncate distally, dorsal processes lacking mesal points ( Fig. 5 B) ...... N. riegeli

- Inferior appendages in ventral view rounded distally, dorsal processes with sclerotized mesal points ( Fig. 7 B).......... ................................................................................................................................................................... N. armitagei

6. Inferior appendages in lateral view longer than wide ( Fig. 9 A); tergum X rounded apically ( Fig. 9 C) ........................ ............................................................................................................................................................... N. rasmusseni

- Inferior appendages in lateral view as wide as long ( Figs 11 A, 15A); tergum X slightly incised apically ( Figs 11 C, 13C) ............................................................................................................................................................................ 7

7. Inferior appendages in ventral view narrowing to acute apices ( Fig. 11 B), dorsal process in lateral view prominent, abruptly turned downward to acute apex ( Fig. 11 A) .......................................................................... N. alabamensis

- Inferior appendages in ventral view narrowing to rounded apices ( Figs. 13 B, 15B), dorsal process in lateral view small ( Fig. 13 A) or not visible ( Fig. 15 A), not downturned ....................................................................................... 8

8. Inferior appendages with dorsal process triangular in lateral view ( Fig. 13 A), in ventral view divided into 3 sections ( Fig. 13 B) ...................................................................................................................................... N. dracanamalama

- Inferior appendages with dorsal process rectangular in lateral view ( Fig. 15 A), in ventral view not divided into mul-

tiple sections ( Fig. 15 B) ....................................................................................................................... N. mentonensis 9. Sternum abdominal segment VIII with sclerotized plate inconspicuous and tubular ( Fig. 2 A), or lacking entirely .... ................................................................................................................................................................ N. mobilensis

- Sternum abdominal segment VIII with conspicuous sclerotozed plate, which may be thin ( Fig. 4 A) or broad ( Fig.10 A)................................................................................................................................................................... 10

10. Sclerotized sternal plate on abdominal segment VIII wide and rectanguloid ( Figs 8 A, 10A) ................................. 11

- Sclerotized sternal plate on abdominal segment VIII thin and curved ( Figs 6 A,12A) ............................................ 13

11. Sclerotized sternal plate on abdominal segment VIII entire mesally ( Figs 10 A, 16A) ............................................ 12

- Sclerotized sternal plate on abdominal segment VIII divided mesally ( Fig. 8 A)..................................... N. armitagei

12. Sternal plate of abdominal segment VIII with anterior margin sinuate, posterior margin with medial protuberance ( Fig. 10 A)............................................................................................................................................... N. rasmusseni

- Sternal plate of abdominal segment VIII with anterior margin straight, posterior margin lacking medial protuberance ( Fig. 16 A) ............................................................................................................................................. N. mentonensis

13. Posterior copulatory channel of bursa copulatrix shorter than genital chamber ( Fig. 6 B); sternal plate of abdominal segment VIII entire mesally ( Fig. 6 A)........................................................................................................... N. reigeli

- Posterior copulatory channel of bursa copulatrix longer or same length as gentital chamber ( Figs 12 C, 14B); sternal plate of abdominal segment VIII divided mesally ( Figs 12 A, 14A) ........................................................................ 14

14. Posterior copulatory channel of bursa copulatrix nearly twice as long as genital chamber ( Fig. 14 B) ........................ ....................................................................................................................................................... N. dracanamalama

- Posterior copulatory channel of bursa copulatrix about same length as genital chamber ( Figs 4 B, 12C) ................ 15

15. Sternal plate of abdominal segment VIII curving laterally, mesally divided with rounded posterior process ( Fig. 12 A) .................................................................................................................................................... N. alabamensis

- Sternal plate of abdominal segment VIII straight laterally, mesally lightly sclerotized, but without rounded posterior process ( Fig. 4 A) ............................................................................................................................................. N. falca

Figures

FIGURE 1. Neotrichia mobilensis, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 2. Neotrichia mobilensis, female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.

FIGURE 3. Neotrichia falca, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 4. Neotrichia falca, female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.

FIGURE 5. Neotrichia riegeli, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 6. Neotrichia riegeli, female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.

FIGURE 7. Neotrichia armitagei, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 8. Neotrichia armitagei, female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.

FIGURE 9. Neotrichia rasmusseni, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 10. Neotrichia rasmusseni, female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.

FIGURE 11. Neotrichia alabamensis, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view. Abbreviations: abdominal segments = VIII, IX, X; bracteole = BR; inferior appendage = IA; dorsal process of inferior appendage = DP; subgenital plate = SGP.

FIGURE 12. Neotrichia alabamenis, female genitalia. A. Abdominal segment VIII, ventral view, B. Abdominal segments VII – X, ventral view, C. Bursa copulatrix, ventral view. Abbreviations: abdominal segments = VII, VIII, IX, X; sternal plate = SP; posterior copulatory channel = PCC; genital chamber = GC; mesal sclerite = MS.

FIGURE 13. Neotrichia dracanamalama, n. sp. male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 14. Neotrichia dracanamalama, n. sp. female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.

FIGURE 15. Neotrichia mentonensis, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 16. Neotrichia mentonensis, female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.