01761nas a2200157   4500008004100000020001400041245014400055210006900199260000800268300001000276490000800286520123300294100001401527700001601541856004601557       1996                        eng d  a0018-815800aAquatic nematodes from Ethiopia .3. The genus Eumonhystera Andrassy, 1981 (Monhysteridae: Nematoda) with the description of E-geraerti n sp0 aAquatic nematodes from Ethiopia 3 The genus Eumonhystera Andrass  cMay  a79-970 v3243 aSix species of the genus Eumonhystera, one of which is new to science, are described from bottom samples of Lake Tana and two associated rivers, River Abbay and R. Gelda, Ethiopia. E. geraerti n. sp. can be identified by being the only species in the genus that combines very posteriorly positioned vulva [V% = 68.2 +/- 0.7 (67.3-69.3)] with very anteriorly positioned amphids (Amph-ABE/LRW = 0.8). The other five species encountered, E. dispar (Bastian, 1865) Andrassy, 1981, E. filiformis (Bastian, 1865) Andrassy, 1981, E. pseudobulbosa (von Daday, 1896) Andrassy, 1981, E. mwerazii (Meyl, 1957) Andrassy, 1981, and E. vulgaris (de Man, 1880), Andrassy, 1981, are described in detail. The identities of some of the already described populations of E. dispar, E. filiformis and E. vulgaris are questioned and clearer and better ways of defining each of these three species are suggested. A peritrophic-like membrane on the outer side of the brush-border of the intestine of E. mwerazii, a species reported here for the first time out of its type locality, is reported. Also, scanning electronmicrographs of sectioned and entire specimens of E. mwerazii are presented. All species are reported from Ethiopia for the first time.1 aAbebe, E.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/268