Tantunema Siddiqi, 1982

Ahad, Sumaya & Ahmad, Wasim, 2016, Taxonomy of the genus Tantunema Siddiqi, 1982 (Dorylaimida: Tylencholaimidae) with description of one new and two known species, Journal of Natural History 50 (27), pp. 1669-1685 : 16

Key to species of the genus Tantunema Siddiqi, 1982

1. Lumen of the posterior portion of pharyngeal bulb widened and thickened ......... 2

2. Lumen of the posterior portion of pharyngeal bulb not widened and thickened ........ 3

3. Circum oral sclerotization present, pharyngeal bulb constricted, tail 9.6 – 10.5 µm ........................................................................................................................................ enigmatum

4. Circum oral sclerotization not present, pharyngeal bulb not constricted, tail 10 – 15 µm ................................................................................................................................ indicum

5. Anterior slender part of pharynx weakly muscular, with abrupt expansion .......... 4

6. Anterior slender part of pharynx weakly or distinctly muscular, with gradual expansion ............................................................................................................................................. 5

7. V = 50 – 54 ...................................................................................................................... intermedium

8. V = 54 – 58 ................................................................... ................................................................... rossi

9. Body length 0.32 – 0.54 mm .......................................................................................................... 6

10. Body length 0.53 – 0.61 mm ........................................................................................ aquaticum

11. Vulva slightly anterior V = 43 – 44%; tail rounded-conoid ........................ pakistanense

12. Vulva slightly posterior V = 45 – 51%; tail obtusely rounded terminus ............................ ..................................................................................................................................... bothriocephalum