Feather mites (Acariformes, Astigmata) from marine birds of the Barton Peninsula (King George Island, Antarctica), with descriptions of two new species Author Han, Yeong-Deok https://orcid.org/0000-0002-6625-8966 Department of Biological Sciences, Inha University, Incheon 22212, Republic of Korea & Restoration Assessment Team, Research Center for Endangered Species, National Institute of Ecology, Gowol-gil 23, Yeongyang-gun, 36531, Republic of Korea Author Mironov, Sergey V. Zoological Institute, Russian Academy of Sciences, Universitetskaya embankment 1, Saint-Petersburg, 199034, Russia Author Kim, Jeong-Hoon Korea Polar Research Institute, Yeonsu-gu, Incheon 21990, Republic of Korea jhkim94@kopri.re.kr Author Min, Gi-Sik Department of Biological Sciences, Inha University, Incheon 22212, Republic of Korea mingisik@inha.ac.kr text ZooKeys 2021 2021-10-04 1061 109 130 http://dx.doi.org/10.3897/zookeys.1061.71212 journal article http://dx.doi.org/10.3897/zookeys.1061.71212 1313-2970-1061-109 5239C96059FE4C04B8BF1D8FC33B4C75 621AC222512E581FAEE2DE9894D5E5D4 Genus Ingrassia Oudemans, 1905 Notes. The genus Ingrassia is the most specious genus within the subfamily Ingrassiinae , including 28 species up to now ( Gaud 1972 ; Vasyukova and Mironov 1991 ; Mironov and Proctor 2008 ; Stefan et al. 2013 ). Representatives of the genus have been recorded on hosts from six orders of aquatic birds: Anseriformes , Charadriiformes , Pelecaniformes , Podicipediformes , Procellariiformes , and Sphenisciformes . Identification keys to species of Ingrassia are available only for those associated with birds in the order Charadriiformes in Africa ( Gaud 1972 ) and northern Eurasia ( Vasyukova and Mironov 1991 ). To date, only six species of the genus Ingrassia have been recorded from procellariiform birds ( Stefan et al. 2013 ).