New record of two feather mites (Acari: Sarcoptiformes: Astigmata) from Korea

Feather mites are bird ectoparasites and comprise three superfamilies: Analgoidea, Freyanoidea and Pter­ olichoidea (Gaud and Atyeo, 1996). Species of feather mites show variation in their morphological structures depending on the microhabitat and host specificity (Dabert and Mironov, 1999). About 2,500 species of feather mites have been recorded from all recent orders of Aves (Gaud and Atyeo, 1996; Proctor, 2003; Mironov and Proctor, 2008). So far, 21 species (12 genera in sev­ en families) of feather mites have been reported from Korea (Atyeo and Gaud, 1971; Cho, 1980; Hwang et al., 1986; Noh and Sohn, 1992; Sohn and Noh, 1994a; 1994b; 1995). The genus Zachvatkinia Dubinin, 1949 is one of 33 genera belonging to the family Avenzoariidae Oudemans, 1905 that comprise 15 species associated principally with birds in the Procellariiformes and Charadriiformes orders (Mironov, 1989; 1992; Gaud and Atyeo, 1996; Mironov and Stefa, 2013; Negm et al., 2013). This ge­ nus has the following diagnostic characteristics: (1) the subcapitulum is not gourd­shaped (the anterior part is not narrowed); (2) setae mG of genua I are filiform; (3) the lateral membrane of the opisthosomal lobe is present; (4) epimerites III and IV are closed in males; and (5) the anterior part of the hysteronotal shield is extended to a humeral shield in females (Mironov, 1989; Stefan et al., 2014). The genus Ardeacarus Dubinin, 1951 is one of 112 genera that belong to the family Pterolichidae Troues­ sart and Mégnin, 1884 and contains only one species. This genus was mostly found in flight feathers on wings of birds of the family Ardeidae, and it has the follow­ ing diagnostic characteristics: (1) the gnathosoma is subtriangular in shape; (2) the basis capitulum is very wide and heavily sclerotized laterally; (3) the anterior tarsi are longer than the conjoined lengths of the tibiae and genua; (4) one internal vertical seta in the prodorsal shield is present; (5) long hair­like setae of the opistho­ somal lobe exist (four pairs in males and two in females) (Dubinin, 1951; 1956; Gaud, 1981; Gaud and Atyeo, 1996). Here, we provide the descriptions and illustrations for Z. larica and A. ardeae based on their morphology. Ad­ ditionally, we provide the partial sequences of the mito­ chondrial cytochrome c oxidase subunit I (COI) as DNA barcode markers.