Tripylina

Prado-Vera, Ignacio Cid Del, Ferris, Howard & Nadler, Steven A., 2016, Five new species of the family Trischistomatidae (Nematoda: Enoplida) from North and Central America, with keys to the species of Trischistoma and Tripylina, Zootaxa 4109 (2), pp. 173-197 : 191-192

Key to the species of Tripylina

1. V > 75%; post-uterine sac present or absent................................................................. 2 V <75%; post-uterine sac absent.........................................................................6 2. Post-uterine sac present................................................................................. 3 Post-uterine sac absent.................................................................................5 3. Body length < 1.4 mm; outer labial setae <12 µm long; pharynx length 164–226 µm............... .. Tp. iandrassyi n. sp. Body length> 1.5 mm; outer labial setae>12 µm long; pharynx length 216–320 µm.................................4 4. Body length 1.5–2.0 mm; outer labial setae <13 µm long; pharynx length 236–320 µm; excretory pore absent..................................................... Tp. bravoe Cid del Prado-Vera, Ferris, Nadler & Lamothe-Argumedo, 2012 Body length 1.5–1.7 mm; outer labial setae <15 µm long; pharynx length 216–242 µm; excretory pore present......................................................................... Tp. longa Brzeski & Winiszewska-Ślipińska, 1993 5. Body length 1.5–1.9 mm; V = 78–81%; three single and two pairs of cervical setae.................................................................................. Tp. gorganensis Asghari, Pourjam, Heydari, Zhao & Ramaji, 2012 Body length 0.8 to 1.6 mm, V = 62–68% cervical setae present or absent......................................... 6 6. Body pores present.................................................................................... 7 Body pores absent.................................................................................... 12 7. Body length 0.8 to 1.2 mm..............................................................................8 Body length 1.3 to 1.6 mm............................................................................. 11 8. Body length 0.8–0.9 mm; cervical setae absent........................... Tp. macroseta Vinciguerra & La Fauci, 1978 Body length 0.9–1.2 mm; cervical setae present.............................................................. 9 9. One cervical seta present; tail length 71–105 µm......................................... Tp. manurewa Zhao, 2009 One ventro-median and two pairs of lateral cervical setae..................................................... 10 10. Tail length 62–77 µm; index a = 25–30; index c = 12.4–17.7................................. Tp. tearoha Zhao, 2009 Tail length 74–82 µm; index a = 20–23; index c = 14.5–15.6.................................. Tp. tamaki Zhao, 2009

11. Cervical setae absent, subventral teeth anterior to dorsal tooth; index c = 18–26................... Tp. yeatesi Zhao, 2009 Cervical setae present, subventral teeth posterior to dorsal tooth; index c = 14–19............................................................................................... Tp. zhejiagensis Pham, Wang, Zhao & Zheng, 2013

12. Male absent; subventral teeth anterior or posterior to dorsal tooth; one or two cervical setae.......................... 13 Male present; subventral teeth posterior to dorsal tooth; one ventromedian cervical seta................................................................................................ Tp. arenícola ( de Man, 1880) Brzeski, 1963

13. Vaginal sclerotized pieces present; excretory pore present..................................................... 14 Vaginal sclerotized pieces absent; excretory pore present or absent.............................................. 16

14. Subventral teeth anterior to dorsal tooth; dorsal wall of stomal chamber distinctly thickened........ Tp. sheri Brzeski, 1963 Subventral teeth posterior or anterior to dorsal tooth; dorsal wall of stomatal chamber not thickened or only slightly thickened.................................................................................................. 15

15. Two ventromedian cervical setae; subventral teeth posterior to dorsal tooth; wall of stomatal chamber not thickened........................................................................................ Tp. rorkabanarum n. sp. One ventromedian cervical seta; subventral teeth anterior to dorsal tooth; wall of stomatal chamber slightly thickened....................................................................................... Tp. kaikoura Zhao, 2009

16. Excretory pore present; subventral teeth anterior or posterior to dorsal tooth...................................... 17 Excretory pore absent; subventral teeth anterior to dorsal tooth.................................................18

17. Body length 0.8–1.2 mm long; caudal setae absent; index c = 9.8–16; two unpaired cervical setae; subventral teeth anterior to dorsal tooth........................ Tp.montecilloensis Cid del Prado-Vera, Ferris, Nadler & Lamothe-Argumedo, 2012 Body length 1.3–1.6 mm; one pair of latero-dorsal caudal setae; index c = 15–23; two unpaired cervical setae, subventral teeth posterior to dorsal tooth................. Tp. ixayocensis Cid del Prado-Vera, Ferris, Nadler & Lamothe-Argumedo, 2012

18. Body length 0.7–0.99 mm; index a = 18–39; subventral teeth anterior to dorsal tooth............................... 19 Body length 0.8–1.3 mm; index a = 22–36; subventral teeth anterior or posterior to dorsal tooth......................20

19. Body length 0.7–0.9. mm; two cervical setae; V = 63–73%; index a = 18–26.......................................................................... Tp. tlamincaensis Cid del Prado-Vera, Ferris, Nadler & Lamothe-Argumedo, 2012 Body length 0.9–1.0 mm; cervical setae absent; V = 66–68%; index a = 31–39....... Tp. valiathani Thaseen & Nusrat, 2010

20. Body length 0.8–1.2 mm; subventral teeth anterior to dorsal tooth; one cervical seta; index a = 22–26... Tp. ursulae ( Argo & Heyns, 1973) Tsalolikhin, 1983

Body length> 1.0 mm; a cervical seta present or absent; index a ≥ 26........................................... 21

21. Body length 1.0– 1.1 mm; cervical setae absent; index a= 26–29; subventral teeth posterior to dorsal tooth....................................................................................... Tp. ymyensis Tahseen & Nusrat, 2010 Body length 1.0– 1.3 mm; one or two cervical setae.......................................................... 22

22. Body length 1.0– 1.2 mm; subventral teeth anterior to and smaller than dorsal tooth; two cervical setae; index a = 30–36.................................................................... Tp. stramenti (Yeates, 1972) Tsalolikhin, 1983 . Body length 1.0– 1.3 mm; subventral teeth posterior to and similar in size to dorsal tooth; one cervical seta; index a = 26–34................................................................ Tp. puxianensis Xu, Zhao, Wang & Zheng, 2013