Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Five new and six known species belonging to the genus Basirotyleptus collected from Western Ghats, India, are described illustrated. conicaudatus sp. nov. is characterized by having 0.42–0.44 mm long body; odontostyle 9.5–10.0 μm, odontophore 11.5–12.0 μm; pharyngeal bulb pear-shaped, 14–15% of total neck length; female genital system mono-opisthodelphic; tail conoid with acute terminus. constrictus 0.38–0.49 perioral disc distinct; 9–10 14–15 15–17% rounded conoid. goaensis 0.73–0.87 13.0–14.5 15.0–17.5 pyriform, 16–18% rounded. neocaudatus 0.31–0.44 7.5–9.5 10–13 14–19% siddiqii 0.36 7.5–8.0 10.0–10.5 15–16% Six viz., B. basiri, pini, nindei, ethiopicus, acus, minutus also Along light microscopic study, line drawings, compendium key provided.