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A systematic review of pterolichid feather mites of the Psittophagus generic group (Pterolichidae, Pterolichinae) is presented. New feather mite taxa are described: Psittaculobius quadriglobus gen. nov., sp. nov. from the Long-tailed Parakeet Psittacula longicauda (type host) and the Red-breasted Parakeet P. alexandri (Psittacidae, Psittacinae), Psittophagus calyptorhynchi sp. nov. from the Yellow-tailed Black Cockatoo Calyptorhynchus funereus (Cacatuidae, Calyptorhynchinae). A key to all genera and species of the Psittophagus group and taxonomic comments on formerly described species are provided, and host-parasite associations of these mites with the parrots from the Old World are briefly discussed. It is hypothesised that the Psittophagus group originated on the ancestors of Psittaciformes at the same time as other pterolichine groups specific to parrots, but in the process of coevolution with these hosts it has achieved significant success on Cacatuidae only, while on Psittacidae, the representatives of this group have been retained only on few phylogenetic lineages in the Old World.
Three new genera of feather mites of the Protolichus generic group (Pterolichidae, Pterolichinae), restricted to parrots, are established based on re-examination of type series and some previously unidentified mite specimens deposited in the collection of E. Trouessart (Muséum National d’Histoire Naturelle, Paris, France): Loriprotolichus gen. nov. with the type species Loriprotolichus charmosynae sp. nov. from Charmosyna papou (Scopoli, 1786) and Loriprotolichus falculiger (Trouessart, 1884) comb. nov. from Glossopsitta concinna (Shaw, 1791); Calyptolichus gen. nov. with type species Calyptolichus favettei (Trouessart, 1899) comb. nov.; Nestorilichus gen. nov. with the type species Nestorilichus atyeoi sp. nov. from Nestor meridionalis (Gmelin, 1788). Several taxonomic changes were implemented in the course of re-examination of the type series. The holotype of Pterolichus (Protolichus) falculiger Trouessart, 1884 is designated. Re-examination of the full syntype series of P. (Protolichus) favettei Trouessart, 1899 representing samples from different hosts, recovered two distinct pterolichid species of the Protolichus generic group. The sample clearly corresponding to the original description (Trouessart, 1899) is fixed as the lectotype and nomenclatural type of P. (Protolichus) favettei; the second species is described as a new species Nestorilichus atyeoi. Protolichus (Mesolichus) favettei cordifora Favette et Trouessart, 1904 is synonymized with P. (Protolichus) favettei.
We present a systematic revision and phylogenetic analysis of feather mites of the closely related genera Apexolichus Gaud et Atyeo, 1996 and Titanolichus Gaud et Atyeo, 1996 (Pterolichidae, Pterolichinae). New diagnoses for Apexolichus and Titanolichus and keys to all known species are provided. We redescribe all species of the genus Protolichus Mégnin et Trouessart, 1884, described by E. Trouessart over a century ago, and which have been transferred to these genera. Two new species are described: Apexolichus psephoti sp. nov. from Psephotus varius Clark A.H., 1910 (type host) and P. haematonotus (Gould, 1838); and Titanolichus triangulifer sp. nov. from Barnardius zonaris (Shaw, 1805) (type host) and Northiella haematogaster (Gould, 1838). New synonymies are proposed: Apexolichus splendens (Favette et Trouessart, 1904) syn. nov. is a junior synonym of A. velifer (Trouessart, 1899); A. distensis (Favette et Trouessart, 1904) syn. nov. is a junior synonym of A. affinis (Mégnin et Trouessart, 1884). Apexolichus platycerci (Mironov, Dabert et Proctor, 2003) comb. nov. is a new combination for this species, which was formerly placed in the genus Titanolichus. Phylogenetic analysis (MP) confirms the monophyly of the genera Apexolichus and Titanolichus. Both of these genera, together with the monotypic genus Sideroferus Gaud et Atyeo, 1996 (being a sister group of Titanolichus), form a clade within the Protolichus generic group and are restricted in their host associations to parrots of the tribe Platycercini (Psittacidae, Psittacinae), members of which occur in the Australia and Indo-Malayan region. Representatives of each genus are restricted to a particular genus or a few genera of Platycercini. Host associations of these genera are briefly discussed.
Xoloptes blaszaki, a new species of the feather mite family Pterolichidae (Pterolichoidea), is described from wing feathers of the Red-legged Partridge Alectoris rufa (L., 1758) (Phasianidae). Fusion of epimerites I and presence of a retrograde ventrobasal apophysis on tibia II in males of the new species differentiate it from the only other described species of Xoloptes (X. claudicans (Robin, 1877)), in which males have free epimerites I and thickened apico-ventral parts of tibiae II. The standard morphological description is supplemented by cytochrome oxidase I sequence data (DNA barcode).
Two new genera and three new species of feather mites (Astigmata, Pterolichoidea, Analgoidea) are described from two closely related species of cockatoos, Cacatua galerita (type host) and C. sulphurea (Psittaciformes, Cacatuidae): Astrolabelichus caudatus gen. nov., sp. nov. (Pterolichidae), Psittophagus lacunosus sp. nov. (Pterolichidae), and Cacatualges microdiscus gen. nov., sp. nov. (Xolalgidae). The presence of the same set of mite species on these two species of parrots points to a very close affinity of Cacatua sulphurea and C. galerita and gives additional support for the recent hypothesis of the conspecificity of these birds.
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