Description of Mononchus oryzae n.sp. with Observation on Coomansus parvus (De Man, 1880) Jairajpuri and Khan, 1977, (Mononchida: Mononchidae) from Pakistan
Description of Mononchus oryzae n.sp. with Observation on Coomansus parvus (De Man, 1880) Jairajpuri and Khan, 1977, (Mononchida: Mononchidae) from Pakistan
Uzma Ishaque1, Erum Iqbal1*, Shahnaz Dawar2 and Nasira Kazi1
ABSTRACT
During a survey for predatory soil nematodes of the order Mononchida, a new species of the genus Mononchus Bastian, 1865 was collected from rice (Oryza sativa L.) field in Nawabshah, Sindh, Pakistan, which has been described and illustrated. Mononchus oryzae n.sp., is characterized by its body, 1.508-1.528 mm long, lip region 23-24 µm wide, buccal cavity 34-36 x 16-17 µm with tooth apex located at 20-22% of stoma length and 3.9-4.2 anal body diameter long tail. M.oryzae n.sp. comes close to M. nudus Gagarin, 1991 and M. labiatus Shah and Hussain, 2016. It differs from former in smaller body length, in the values of b and c, vulva located more posteriorly and in shorter tail length. From M. labiatus it differs in having higher values of indices, in shorter tail length, in anteriorly located nerve ring and caudal glands arranged in tandem. The genus Coomansus Jairajpuri and Khan 1977, and its species Coomansus parvus (de Man. 1880) Jairajpuri and Khan, 1977 has been reported for the first time from Pakistan.
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