TY - JOUR JF - Acarologia T1 - Vitzthumegistidae, fam. nov.: trigynaspid mites on terrestrial hermit crabs (Anactinotrichida: Mesostigmata: Trigynaspida) VL - 55 IS - 2 SP - 201 EP - 208 PY - 2015 SN - 0044-586X SN - 2107-7207 PB - Les Amis d'Acarologia AU - Kim, C.-M. UR - https://doi.org/10.1051/acarologia/20152161 DO - 10.1051/acarologia/20152161 DA - 2015-06-30 ET - 2015-06-30 KW - Acari KW - Parasitiformes KW - Antennophoriae KW - Cercomegistiae KW - Cercomegistoidea KW - nomen nudum KW - nomen novum KW - mite-host association KW - Coenobita AB - A new family of cercomegistoid mesostigmatid mites, Vitzthumegistidae, including the species of Vitzthumegistus paguroxenus (Andre, 1937b) (= Physalozercon paguroxenus Andre, 1937b); V. latronis (Vitzthum, 1937) (= Cyclothorax latronis Vitzthum, 1937); and V. andrei (a nomen novum for Cyclothorax carcinicola von Frauenfeld, 1868, sensu Vitzthum, 1928), has been proposed. This family differs from the Cercomegistidae by the following characters: a holodorsal shield, absence of presternal shield, weakly sclerotized or vestigial (neither paired nor fragmented) sternal shield in the female, a smooth anterior and lateral margin of gnathotectum, and heavily branched (polyramous) hypostomal setae 1 (hs1) in the adult. The Vitzthumegistidae fam. nov. becomes biologically a unique group within the Trigynaspida, in which the members exhibit associations with paguroid hermit crabs (Crustacea: Decapoda: Paguroidea) in the Indo-Pacific region. A key to species of the Vitzthumegistus is provided. ER -