Criconematidae (Nematoda : Tylenchida) from the New Zealand region: generaOgma Southern, 1914 and Blandicephalanema Mehta & Raski, 1971

Seven Ogma species new to Science are described from native vegetation in N ew Zealand. O. campbelli n. sp. and O. sexcostatum n. sp. have six, Ogma po lyandra n. sp., O. subantarcticum n. sp., O. semicrenatum n. sp., O. paucis pinatum n. sp. and O. crenulntum n. sp. have eight or more rows of palmate scales. O. sexcostatum differs from O. campbelli by its shorter body (0.36 vs 0.49 mm), greater number of body annules (60-69 vs 50-57) and shorter sp ines on the ventral side of the post-vulval area. O. subantarcticum and O. polyandra both have a fringe of appendages on the lip annules but differ in body diameter (64 vs 47 mu m), number of spines per body scale (more than seven vs less than eight) and stylet length (102 vs 92 mu m). O. semicrenat um has no appendages on the first lip annule. O. paucispinatum differs from the previous species by having less than five (generally three) appendages on the scales. O. crenulatum differs from O. subantarcticum and O. semicre natum, the species with about five appendages, by the weakly crenate or smo oth edge of both the first and the second lip annule. Blandicephalanema is represented by B. serratum Mehta & Raski, 1971, B. pilatum Mehta & Raski, 1 971 and B. bossi Reay, 1987.