Three new species of nematodes belonging to Mononchida Jairajpuri 1969, from Rhizosphere of mango in Western Uttar Pradesh, India

Three species of predatory nematodes belonging to genera, Miconchus, Prionchulus and Parahadronchus were found in rhizosphere of Mango in Meerut district. These populations were studied in detail and on comparison with existing species in the respective genera were found to be new. Hence, these are designated as Miconchus sardhanensis n.sp., Prionchulus prasadi n.sp. and Parahadronchus mangiferi n.sp. Miconchus sardhanensis is characterized by having body length = 1.750–1.960 mm, a = 22–25, b = 3.7–3.9, c = 9.3–12.3, c’ 3.4 –.4, and v = 64–66 and was compared with closest species Miconchus citriKhan, Ahmad and Jairajpuri 1978 and Miconchus dalhousiensis n. sp. Jairajpuri 1969, Prionchulus prasadi n. sp. was characterized by having body length = 1.43–1.67 mm, a = 20–21, b = 3.2–3.3, c = 11.2–13.5, c’ = 3.0–3.7, v = 65–66 and was separated from closest species Prionchulus muscorum (Dujardin, 1945) Cobb, 1916 and Prionchulus borealis Anndrassy 2003 and Parahadronchus mangiferi n.sp. was characterized by body length = 2.47–2.58 mm, a = 24–28, b = 4.2–4.3, c = 6.9–7.3, c’ = 6.8–7.4, v = 60–62 and was distinguished from nearest species Parahadronchus shakili (Jairajpuri 1969) Mulvey 1978.