The genus Basiria Siddiqi, 1959 (Nematoda: Tylenchidae) from Dezful region, Iran

A survey was conducted during 2018 and 2019 in order to identify plant-parasitic nematodes of the genus Basiria in Dezful region of Khuzestan province, southwestern Iran. Nematodes were extracted from the soil and root samples by using tray method, transferred to glycerin and mounted on permanent slides. Nematodes were identified based on morphological and morphometric characters. As a result, eight species including B. aberrans, B. duplexa, B. gracilis, B. jirians, B. tumida, B. graminophila, B. ritteri, and B. similis were identified; three species namely B. jirians, B. ritteri, and B. similis are here described and illustrated for the first time from Iran. B. jirians is characterized by body length 445–535 µm, stylet 9.0–9.2 µm, cephalic region without annuli, DGO 2.0–2.5 µm, median bulb at anterior end of pharynx, basal bulb pyriform, spermatheca non offset and tail elongate conoid with pointed to filiform terminus. B. ritteri can be characterized by body length 685–747 µm, stylet 10.5–11.5 µm, median bulb located at anterior half of pharynx, basal bulb cylindroid, spermatheca non offset and tail annulated and notched at tip. B. similis is characterized by body length 644–736 µm, stylet 10.3–11 µm, DGO 8.9–10.5 µm, basal bulb cylindroid and tail clavate.