Reddell & Cokendolpher 1991. Redescription of Schizomus crassicaudatus (Pickard-Cambridge) and diagnoses of Hubbardia Cook, Stenochrus Chamberlin, and Sotanostenochrus new genus, with description of a new species of Hubbardia from California (Arachnida: Schizomida: Hubbardiidae). Pearce-Sellards Series Texas Memorial Museum, 47, February 13 1991: 1-24