Ref ID : 7250
B.A. Ebsary; Mononchoides andersoni n. sp. and two new species of Koerneria (Nematoda: Diplogasteridae). Can.J.Zool. 64:2012-2020, 1986
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Mononchoides andersoni n. sp., Koerneria terranovus n. sp., and Koerneria mulveyi n. sp. are described and illustrated from Canadian localities Mononchoides andersoni n. sp. is characterized by a body length of 1066-1246 µm, a porelike vulva at 36-39%, a tail of 403-439 µm, c' value of 22(20-26), and telostom base with two small subventral teeth. Koerneria terranovus n. sp. and Koerneria mulveyi n. sp are unique amongst Koerneria species because of their large a values (53-68), which are at least twice those of other species. Koerneria terranovus females differ from K. mulveyi by the narrower cheilostom aperture (30 vs. 50% of head width), greater length (1735-1771 µm vs. 1377-1678 µm), smaller c' value of (11-12 vs. 14(10-18)), shorter cephalic setae (3-3.5 µm vs. 5-6 µm), and linear cheilorhabdions versus isoscheles triangle shaped cheilorhbdions in K. mulveyi. The males of K. mulveyi have cephalic setae about one half the length of those in the female while the male and female of K. terranovus have cephalic setae of equal length, and the gubernaculum is longer (14 µm vs. 11 µm) in K. mulveyi. New combinations are proposed for species transferred from Mononchoides to Koerneria: K. angarensis (Gagarin, 1983) n. comb., K. ivanegae (Gagarin, 1983) n. comb., K. ruriculus (Gagarin, 1983) n. comb., and K. strenuus (Gagarin, 1983) n. comb. Mononchoides tsalolichini Gagarin and Lemsina (1983) is a lapsus calami for Fictor tsalolichini. Mononchoides aquaticus Dassonville and Heyns (1984) is transferred to Oigolaimella becoming O. aquatica n. comb. Mononchoides fictor (Bastian, 1865) Goodey, 1963 and Koerneria bicornis (Rahm, 1929) Goodey, 1963 are considered to be species inquirendae. Keys to the species of Mononchoides and Koerneria are provided.