New Mesostigmata records and species from the Korean Peninsula.

A total of 20 Mesostigmata species are recorded from the Korean Peninsula, of which 15 (Asca nubes Ishikawa, 1969, Lasioseius tomokoae Ishikawa, 1969, Evimirus uropodinus (Berlese, 1903), Macrocheles glaber (Müller, 1860), Macrocheles punctatus Ishikawa, 1967, Pachylaelaps ishizuchiensis Ishikawa, 1977, Gamasiphis pulchellus (Berlese, 1887), Ololaelaps ussurinensis Bregetova & Koroleva, 1964, Gamasellus humosus Ishikawa, 1969, Gamasholaspis variabilis Petrova, 1967, Parholaspulus hiasmaticus Petrova, 1967, Podocinum tsushimanum Ishikawa, 1970, Neoparasitus scleoides Ishikawa, 1969, Veigaia ochracea Bregetova, 1961, Uropoda similihamulifera Hiramatsu, 1979) are presented as first occurrences from this peninsula. Asca aphidioides (Linnaeus, 1758) is already reported from the southern part of the peninsula, but we present the first occurrence in the Democratic People's Republic of Korea. One species (Trachytes koreana Kontschán & Lim, sp. nov.) is described and illustrated in this paper. Seventeen of the recovered species were collected in the Democratic People's Republic of Korea; the others were collected in the area of Republic of Korea. [ABSTRACT FROM AUTHOR]