Mononchida of Garhwal Himalayas (U.P.), India-I. Description of known and new species of the genus Coomansus Jairajpuri & Khan, 1977 (Nematoda: Mononchida)

Three known and two new species of the genus Coomansus have been described. C. indicus, C. parvus, C. campbelli were collected from different localities in Garhwal Himalayas. C. parvus was most frequent. Coomansus minor n.sp. is collected from high altitude in Uttarkashi District. It is smallest among all species of the genus. It comes close to C. parvus (De man, 1980) Jairajpuri & Khan, 1977 and C. obliquoris (Eroshenko, 1975) Jairajpuri & Khan, 1977, but differs from C. parvus in the size of body length, shape of lips and value of “a”. It differs from the latter in having a shorter body length and shorter tail. Coomansus garhwalicus n.sp. comes close to C. indicus Jairajpuri & Khan, 1977 but differs in its lip width, lip height, length and width of buccal cavity, the position of dorsal tooth from the base of buccal cavity, measurements of “V” and tail length.