Revision of genera in Goniodidae (Phthiraptera: Ischnocera) parasitising gamefowl (Aves: Galliformes) with descriptions of six new genera, one new subgenus and seven new species.

Hitherto, the chewing louse genus Goniodes Nitzsch, 1818 (Phthiraptera: Ischnocera: Goniodidae) has been the repository of many morphologically different species, which have been placed in separate groups by some authors. The morphological variation among species of Goniodes is so extensive that no characters can unequivocally separate it from closely related genera within the Goniodidae, in particular Goniocotes Burmeister, 1838. Based on a thorough examination of many species, especially the type species of related genera, we propose to divide Goniodes into thirty-one smaller, morphologically homogeneous genera. We provide redescriptions of Goniodes sensu stricto and three previously proposed genera: Gonotyles Kéler, 1940; Oulocrepis Kéler, 1940; and Solenodes Kéler, 1940. In addition, we recognise the following genera and one subgenus as valid: Archigoniodes Conci, 1946; Clayarchigoniodes Conci, 1952 (subgenus); Astrocotes Kéler, 1940; Astrodes Kéler, 1940; Claygoniodes Conci, 1946; Dictyocotes Kéler, 1940; Euligoniodes Mey, 1997; Goniocotes; Homocerus Kéler, 1940; Kelerigoniodes Conci, 1946; Leipoiella Mey, 1986; Lobicrotaphus Mey, 1997; Maleoicus Mey, 1997; Maleophilus Mey, 1997; Margaritenes Kéler, 1940; Megatheliella Mey, 1986; Pavoniocotes Gustafsson et al., 2023; Stenocrotaphus Kéler, 1940 and Weelahia Mey, 1997. We also propose six new genera within the Goniodes complex: Complectodesnew genus, Majiodes new genus, Rhopaloncusnew genus, Sikongianew genus, Sulciferodesnew genus, and Tragoniodesnew genus and one subgenus: Gonotyles (Syrmatichares) new subgenus. Seven new species are described and illustrated from Asian hosts: Goniodes claytonbushorumnew species ex Pavo muticus imperator Delacour, 1949; Gonotyles (Syrmatichares) selenautesnew species ex Syrmaticus ellioti (Swinhoe, 1872); Oulocrepisstylophorusnew species ex Bambusicola thoracicus (Temminck, 1815); Rhopaloncuslepidocerosnew species ex Lophophorus sclateri orientalis Davidson, 1974; Solenodes ningxiaensisnew species ex Alectoris magna (Przevalski, 1876); Tragoniodes gallowayinew species ex Tragopan temminckii (Gray, 1831) and Tragoniodes yinhenew species ex Tragopan caboti (Gould, 1857). A list of the new generic placements proposed for the species included in Goniocotes and Goniodes by Price et al. (2003) is included.