Two New Oribatid Mites of the Family Malaconothridae in Wakayama Prefecture, Central Japan(Acari: Oribatei).

Two new species belonging to the genera Malaconothrus BERLESE, 1904 and Trimalaconothrus BERLESE, 1916 were described from surface soil and moss in Wakayama Prefecture. Malaconothrus kiiensis sp. nov. is very similar to Malaconothrus yamamotoi AOKI, 1994 from Central Japan and Malaconothrus variosetosus HAMMER, 1971 from Fiji, but is distinguishable from them by large body size, barbed lamellar seta and long lamellar and interlamellar setae. Trimalaconothrus magnilamellatus sp. nov. is similar to Trimalaconothrus australis HAMMER, 1958 from South America in having conspicuously developed S-shaped lamellar ridges, but is distinguishable from the latter by small body size, long notogastral setae c1 and c2, partly barbed notogastral setae, barbed epimeral setae and eight genital setae.