The Neotrichia caxima Group (Trichoptera: Hydroptilidae) in the southeastern United States Author Harris, Steven C. Author Rasmussen, Andrew K. text Zootaxa 2010 2608 25 44 journal article 10.5281/zenodo.197730 4d396133-2bba-4288-aef5-6de78bb06c8b 1175-5326 197730 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