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Gardini, G. (2009b). Neotype fixation and redescription of Chthonius tetrachelatus (Preyssler, 1790), type species of the subgenus Ephippiochthonius Beier, 1930 (Pseudoscorpiones: Chthoniidae). Klapalekiana 45: 23–31. -- Show included taxa
Gardini, G. (2009c). Gli Pseudoscorpioni della Riserva Naturale "Agoraie di Sopra e Moggetto" (Liguria, Genova) (Pseudoscorpiones). Bollettino del'Associazione Romana di Entomologia 64: 33–37. -- Show included taxa
Gardini, G. (2009d). Chthonius thaleri, a new endogeic species from Venetia, Italy (Pseudoscorpiones: Chthoniidae). Contributions to Natural History 12: 545–550. -- Show included taxa
Haddad, C.R. & Dippenaar-Schoeman, A.S. (2009). A checklist of the non-acarine arachnids (Chelicerata: Arachnida) of the De Hoop Nature Reserve, Western Cape Province, South Africa. Koedoe 51(2): 1–9. -- Show included taxa
Harvey, M.S. (2009a). Pseudoscorpions of the World, version 1.2. Western Australian Museum, Perth. http:.. (External link) -- Show included taxa
Harvey, M.S. (2009b). The first Australasian species of the halophilic pseudoscorpion genus Paraliochthonius (Pseudoscorpiones: Chthoniidae). Records of the Western Australian Museum 25: 329–344. -- Show included taxa
Haupt, J. (2009a). Proposal for the synonymy of some south-east Asian whip scorpion genera (Arachnida, Uropygi, Thelyphonida). Revista Ibérica de Aracnología 17: 13–20. -- Show included taxa
Haupt, J. (2009b). Thelyphonellus venezolanus n. sp., a new species of vinegaroons (Arachnida: Uropygi: Thelyphonida). Revista Ibérica de Aracnología 17: 63–65. -- Show included taxa
Haupt, J. (2009c). Chelicerae of arachnids: facts and fiction. Arthropoda Selecta 18: 17–19. -- Show included taxa
Henderickx, H. (2009). A new Feaella species (Pseudoscorpiones: Feaellidae) from Kenya. Phegea 37: 41–47. -- Show included taxa
Höfer, H. & Ott, R. (2009). Estimating biomass of Neotropical spiders and other arachnids (Araneae, Opiliones, Pseudoscorpiones, Ricinulei) by mass-length regressions. Journal of Arachnology 37: 160–169. -- Show included taxa
Huff, J.C. & Prendini, L. (2009). On the African whip scorpion, Etienneus africanus (Hentschel, 1899) (Thelyphonida: Thelyphonidae), with a redescription based on new material from Guinea-Bissau and Senegal. American Museum Novitates 3658: 1–16. -- Show included taxa
Jennings, J.T., Austin, A.D., Davies, K.A., Harvey, M.S., Hirst, D.B. & Taylor, G.S. (2009). Terrestrial invertebrates. In: Jennings, J.T. (ed.) Natural history of the Riverland and Murraylands Royal Society of South Australia Inc., Adelaide: 306–333. -- Show included taxa
Judson, M.L.I. (2009). Cheliferoid pseudoscorpions (Arachnida, Chelonethi) from the Lower Cretaceous of France. Geodiversitas 31: 61–71. -- Show included taxa
Judson, M.L.I. (2009). Neovochthonius nom. nov. pro Neochthonius Karppinen (Acari, Oribatei, Protoplophoroidea, Heterochthoniidae). Zootaxa 1992: 68. -- Show included taxa
Klann, A.E., Bird, T., Peretti, A.V., Gromov, A.V. & Alberti, G. (2009). Ultrastructure of spermatozoa of solifuges (Arachnida, Solifugae): possible characters for their phylogeny? Tissue and Cell 41: 91–103. doi: https://doi.org/10.1016/j.tice.2008.07.003 -- Show included taxa
Klausen, F.E. (2009). A new genus of pseudoscorpion from East Africa (Pseudoscorpiones, Atemnidae). Bulletin of the British Arachnological Society 14: 334–338. -- Show included taxa
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Korenko, S., Harvey, M.S. & Pekár, S. (2009). Stenochrus portoricensis new to the Czech Republic (Schizomida, Hubbardiidae). Arachnologische Mitteilungen 38: 1–3. doi: http://dx.doi.org/10.5431/aramit3801 -- Show included taxa
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Krehenwinkel, H., Curio, E., Tacud, J. & Haupt, J. (2009). On Thelyphonoides panayensis gen. et sp. n. (Arachnida: Uropygi: Thelyphonidae), a new genus and a new species of whip scorpions from Panay Island (Philippines). Arthropoda Selecta 18: 139–143. -- Show included taxa
Luna-Sarmiento, D. (2009). Pseudoescorpiones. In: Amat-García, G. (ed.) Biodiversidad regional: Santa María, Boyacá. Guía De Campo. Artropodos: Aracnidos, Miriapodos, Crustaceos, Insectos. Serie de Guías de Campo. Del Instituto de Ciencias Naturales Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá no. 5: 57–59. -- Show included taxa
Luna-Sarmiento, D. (2009a). Uropygidos. In: Amat-García, G. (ed.) Biodiversidad regional: Santa María, Boyacá. Guía De Campo. Artropodos: Aracnidos, Miriapodos, Crustaceos, Insectos. Serie de Guías de Campo. Del Instituto de Ciencias Naturales Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá no. 5: 60–63. -- Show included taxa
Luna-Sarmiento, D. (2009b). Amblypygidos. In: Amat-García, G. (ed.) Biodiversidad regional: Santa María, Boyacá. Guía De Campo. Artropodos: Aracnidos, Miriapodos, Crustaceos, Insectos. Serie de Guías de Campo. Del Instituto de Ciencias Naturales Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá no. 5: 64–66. -- Show included taxa