..............................................................................................................................................................................4 Introduction .........................................................................................................................................................................5 Historical summary .............................................................................................................................................................6 Material and methods .......................................................................................................................................................... 9 Cladistic analysis ...............................................................................................................................................................20 Biology and host-parasite relationships of endoparasitic sarcoptoids ..............................................................................26 Systematics ........................................................................................................................................................................35 Family Gastronyssidae Fain, 1959 ....................................................................................................................................35 Key to subfamilies of the family Gastronyssidae Fain, 1959 ....................................................................................36 Subfamily Gastronyssinae Fain, 1959 ...............................................................................................................................36 Key to tribes of the subfamily Gastronyssinae Fain, 1959 ........................................................................................36 Tribe Gastronyssini Fain, 1959 ..................................................................................................................................37 Tribe Rodhainyssini Fain, 1964 st. nov. .....................................................................................................................43 Key to genera of the tribe Rodhainyssini Fain, 1956 .................................................................................................44 Genus Rodhainyssus Fain, 1956 ........................................................................................................................44 Key to the genus Rodhainyssus Fain, 1956 ................................................................................................................64 Genus Opsonyssus Fain, 1959 ...........................................................................................................................65 Key to the genus Opsonyssus Fain, 1959 ...................................................................................................................81 Genus Pseudoopsonyssus Bochkov et OConnor gen. nov...................................................................................81 Key to the genus Pseudoopsonyssus Bochkov et OConnor, gen. nov. ......................................................................88 Genus Mycteronyssus Fain, 1959 .......................................................................................................................88 Genus Eidolonyssus Fain, 1967 .........................................................................................................................92 Tribe Phyllostomonyssini Bochkov et OConnor tr. nov. ...........................................................................................97 Genus Phyllostomonyssus Fain, 1970 ................................................................................................................98 Subfamily Yunkeracarinae Fain, 1964 ............................................................................................................................102 Key to genera of the subfamily Yunkeracarinae Fain, 1964 .................................................................................... 102 Genus Yunkeracarus Fain, 1957 ...................................................................................................................... 102 Key to females of the genus Yunkeracarus Fain, 1957 ............................................................................................128 Genus Sciuracarus Fain, 1964 .........................................................................................................................129 Key to genera of the family Lemurnyssidae Fain, 1957 .................................................................................................131 Genus Lemurnyssus Fain, 1957 .......................................................................................................................131 Genus Mortelmansia Fain, 1959 ...................................................................................................................... 132 Key to species of the genus Mortelmansia Fain, 1959 ............................................................................................142 Family Pneumocoptidae Baker, Camin, Cunliffe, Woolley et Yunker, 1958 ..................................................................143 Genus Pneumocoptes Baker, 1951 ...................................................................................................................144 Key to females of the genus Pneumocoptes Baker, 1951 ........................................................................................150 Acknowledgements .........................................................................................................................................................150 References ....................................................................................................................................................................... 150