Contribution to the knowledge of the oribatid mite genus Unguizetes (Acari, Oribatida, Mochlozetidae)

A new generic diagnosis for Unguizetes (Oribatida, Mochlozetidae) is proposed. The taxonomic status of the mochlozetid genus Calugarella is discussed, resulting in the following taxonomic proposal: Unguizetes Sellnick, 1925 is a senior subjective synonym of Calugarella J. Balogh & P. Balogh, 1992 (syn. nov.). The initial placement of Unguizetes sabahnus Mahunka, 1987 in Unguizetes is supported. Supplementary descriptions of Unguizetes similis Mahunka, 1998 and U. atypicus (Mahunka, 1982) are presented, based on material from Ecuador and Ethiopia, respectively. The tritonymph of U. atypicus is described; it is the first investigation of juveniles for any member of Unguizetes. The morphological differences among known tritonymphs of Mochlozetidae are given. An identification key to all known species of Unguizetes is provided.