A review of the Geomydoecus californicus complex (Mallophaga: Trichodectidae) from Thomomys (Rodentia: Geomyidae)

Sixteen species and subspecies of the Geomydoecus californicus complex are described and illustrated: G. californicus from 14 subspecies of Thomomys bottae (type-host: T. b. bottae); G. centralis, n. sp. from 59 subspecies of T. bottae and 1 of T. umbrinus (type-host: T. b. centralis); G. albati, n. sp. from 4 subspecies of T. bottae (type-host: T. b. albatus); G. angularis, n. sp. from 9 subspecies of T. bottae (type-host: T. b. angularis); G. bajaiensis, n. sp. from 16 subspecies of T. bottae (type-host: T . b. abbotti); G. clausonae, n. sp. from 2 subspecies of T. bottae (type-host: T. b. anitae); G. limitaris limitaris, n. sp, from 9 sub-species of T. bottae (type-host: T. b. limitaris); G. l. bakeri, n. subsp. from 7 subspecies of T. bottae and 1 of T. umbrinus (type-host: T. b. fulvus); G. l. halli, n. subsp. from 3 subspecies of T . bottae (type-host: T. b. proximus); G. l. tolteci, n. subsp. from 5 subspecies of T. bottae (type-host: T. b. toltecus): G. aurei aurei, n. sp. from 9 subspecies of T. bottae (type-host: T. b. aureus); G. a. grahamensis, n. subsp. from 6 subspecies of T. bottae and 1 of T. umbrinus (type-host: T. b. grahamensis); G. actuosi, n. sp. from 13 subspecies of T. bottae (type-host: T. b. actuosus); G. sinalone, n. sp. from 2 subspecies of T. bottae (type-host: T. b. sinalone); G. crovelloi, n. sp. from 2 subspecies of T. umbrinus (type-host: T. u. sonoriensis); and G. warmanne, n sp. from 1 subspecies of T. bottae and 13 of T. umbrinus (type-host: T. u. madrensis). Distinctions among taxa are shown using qualitative and quantitative characters. Discriminant functions for 2 or 3 characters are provided in instances where they are shown to offer enhanced differentiation over single characters. A key is provided for the identification of these 16 taxa.