Tripylella australis sp. nov. and Tripyla setifera Bütschli 1873 (Nematoda: Triplonchida: Tripylidae) from Australia Author Xu, Yu Mei Author Zhao, Zeng Qi Author Davies, Kerrie A. Author Wang, Jian Ming text Zootaxa 2017 4250 1 55 66 journal article 33317 10.11646/zootaxa.4250.1.4 2307bc47-81c1-41b7-833d-db09a1675d3f 1175-5326 439799 35287498-7873-4643-8EF9-0E4BFA3B0903 Key to the species of Tripylella 1. Tail with uniform tapering...............................................................................2 - Tail with abrupt tapering................................................................................4 2. Body length more than 1 mm ; outer labial setae more than 7 µm................................................3 - Body length less than 1mm ; outer labial setae less than 4 µm.......................................... T. minuscula 3. Body length 1810–1832 µm; outer labial setae 13–14 µm; caudal setae on tail present.......... Tripylella australis sp. nov. - Body length 1080–1400 µm; outer labial setae 7–9 µm; caudal setae on tail absent......................... T. maiuscula 4. Subventral teeth absent; smooth cuticle............................................................. T. iucunda - Subventral teeth present; annulated cuticle..................................................................5 5. Two large teeth in the posterior stomatal chamber and two subventral teeth in a smaller anterior chamber.......... T. dentata - Stoma with one dorsal and two subventral teeth..............................................................6 6. Subventral teeth posterior to dorsal tooth........................................................ .. T. intermedia - Subventral teeth anterior to dorsal tooth....................................................................7 7. Dorsal tooth large; excretory pore absent...................................................... T. subintermedia - Dorsal tooth small; excretory pore present or absent..........................................................8 8. Excretory pore present.................................................................................9 - Excretory pore absent......................................................................... T. quitoensis 9. Body length 0.8–1.0 mm; caudal setae on tail absent................................................... T. muscusi - Body length less than 0.8 mm , caudal setae on tail present....................................................10 10. Two pairs of caudal setae on tail; excretory pore 80–93 µm from anterior end.............................. T. mexicana - Three pairs of caudal setae on tail; excretory pore 58–86 µm from anterior end........................... T. fatimaensis