Tantunema Siddiqi 1982
Creators: name: Ahad, Sumaya
name: Ahmad, Wasim
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Adenophorea
Dorylaimida
Tylencholaimidae
Tantunema
Tantunema bothriocephalum

description: Genus <i>Tantunema</i> Siddiqi, 1982 <i>Diagnosis</i> <i>Tylencholaiminae.</i> Very small nematodes, 0.3 <i>–</i> 0.6 mm long. Cuticle tylencholaimoid; outer cuticle smooth, inner layer barely with distinct radial refractive elements. Lip region cap-like, slightly offset, with amalgamated lips; weak post-labial sclerotization often present. Amphids small, their aperture pore-like or short transverse slit. Odontostyle short and thin. Odontophore rod-like with slight basal thickening. Anterior portion of the pharynx weakly muscular, extending gradually or abruptly into the basal expansion, which occupies about two-fifths of total neck length. Female genital system mono-opisthodelphic, anterior branch completely absent. Vulva transverse. Female tail rounded to subcylindrical. Male not known. <i> <i>Type species</i> </i> <i>Tantunema bothriocephalum Siddiqi, 1982</i> <i>Other species</i> <i>T. aquaticum Ahmad and Jairajpuri, 1983</i> <i>T. enigmatum Ahmad and Baniyamuddin, 2010</i> <i>T. indicum</i> sp. nov. <i>T. intermedium (Peña-Santiago and Coomans, 1996) Andrássy, 2009</i> = <i>Opisthotylencholaimus karnataki Dhanam and Jairajpuri, 1999</i> <i>T. pakistanense (Timm, 1964)</i> comb. nov. <i>= Tylencholaimus pakistanensis Timm, 1964</i> <i>T. rossi (Yeates, 1979) Peña-Santiago and Coomans, 1996</i> = <i>Tylencholaimus rossi</i> Yeates, 1979 <b>Key to species of the genus <i>Tantunema</i> Siddiqi, 1982</b> 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 <i>–</i> 10.5 µm........................................................................................................................................ <i>enigmatum</i> 4. Circum oral sclerotization not present, pharyngeal bulb not constricted, tail 10 <i>–</i> 15 µm................................................................................................................................ <i>indicum</i> 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 <i>–</i> 54...................................................................................................................... <i>intermedium</i> 8. V = 54 <i>–</i> 58...................................................................................................................................... <i>rossi</i> 9. Body length 0.32 <i>–</i> 0.54 mm.......................................................................................................... 6 10. Body length 0.53 <i>–</i> 0.61 mm........................................................................................ <i>aquaticum</i> 11. Vulva slightly anterior V = 43 <i>–</i> 44 %; tail rounded-conoid........................ <i>pakistanense</i> 12. Vulva slightly posterior V = 45 <i>–</i> 51 %; tail obtusely rounded terminus................................................................................................................................................................. <i>bothriocephalum</i> <b>Key to species of the genus <i>Tantunema</i> Siddiqi, 1982</b> 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 <i>–</i> 10.5 µm........................................................................................................................................ <i>enigmatum</i> 4. Circum oral sclerotization not present, pharyngeal bulb not constricted, tail 10 <i>–</i> 15 µm................................................................................................................................ <i>indicum</i> 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 <i>–</i> 54...................................................................................................................... <i>intermedium</i> 8. V = 54 <i>–</i> 58...................................................................................................................................... <i>rossi</i> 9. Body length 0.32 <i>–</i> 0.54 mm.......................................................................................................... 6 10. Body length 0.53 <i>–</i> 0.61 mm........................................................................................ <i>aquaticum</i> 11. Vulva slightly anterior V = 43 <i>–</i> 44 %; tail rounded-conoid........................ <i>pakistanense</i> 12. Vulva slightly posterior V = 45 <i>–</i> 51 %; tail obtusely rounded terminus................................................................................................................................................................. <i>bothriocephalum</i>
description: Published as part of <i>Ahad, Sumaya &amp; Ahmad, Wasim, 2016, Taxonomy of the genus Tantunema Siddiqi, 1982 (Dorylaimida: Tylencholaimidae) with description of one new and two known species, pp. 1669-1685 in Journal of Natural History 50 (27)</i> on pages 15-16, DOI: 10.1080/00222933.2016.1155670, http://zenodo.org/record/269012
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