7,800 references
Chamberlin, J.C. (1931c). A synoptic revision of the generic classification of the chelonethid family Cheliferidae Simon (Arachnida). Canadian Entomologist 63: 289–294. -- Show included taxa
Drenski, P. (1931). [Galeodes graecus C.L. Koch (Arach.) in Bulgarien]. Mitteilungen aud den Koniglichen Naturwissenschaftlichen Instituten, Sofia 4: 87–96. -- Show included taxa
Falconer, W. (1931). Isle of Wight Arachnida. New and additional records.. Proceedings of the Isle of Wight Natural History Society 2: 118–124. -- Show included taxa
Franganillo Balboa, P. (1931). Excursiones aracnológicas durante el mes de Agosto de 1930. Revista Belén, La Habana 24: 44–49, 116–120, 168–171, 219–224, 285–288. -- Show included taxa
Giltay, L. (1931). Scorpions et Pédipalpes. In: Résultats Scientifiques du voyage aux Indes Orientales Néerlandaises de LL. AA. RR. de Prince et la Princesse Léopold de Belgique. Mémoires du Musée Royal d'Histoire Naturelle de Belgique 3(6): 1–28. -- Show included taxa
Hewitt, J. (1931). A new solifuge and scorpion from South-West Africa. Annals of the South African Museum 30: 93–99. -- Show included taxa
Hilton, W.A. (1931). Nervous system and sense organs. Pseudoscorpionida.. Journal of Entomology and Zoology, Pomona College 23: 67–75. -- Show included taxa
Kästner, A. (1931). Arachnida. In: Dittler, R. (ed.) Handwörterbuch der Naturwissenschaften Gustav Fischer, Jena 2: 356–387. [2. Auflage] -- Show included taxa
Kästner, A. (1931a). Studien zur Ernährung der Arachniden. 2. Der Fressakt von Chelifer cancroides L.. Zoologischer Anzeiger 96: 73–77. -- Show included taxa
Kästner, A. (1931b). Die Hüfte und ihre Umformung zu Mundwerkzeugen bei den Arachniden. Versuch einer Organgeschichte. Zeitschrift für Morphologie und Ökologie der Tiere 22: 721–758. -- Show included taxa
Lawrence, R.F. (1931). New South African Solifugae. Annals of the South African Museum 30: 131–136. -- Show included taxa
Mello-Leitão, C. (1931). Pedipalpos do Brasil e algumas notas sobre a ordem. Archivos do Museu Nacional do Rio de Janeiro 33: 8–72. -- Show included taxa
Morley, C. (1931). Arachnida. Transactions of the Suffolk Naturalists' Society 1: 225. -- Show included taxa
Müller, G. (1931). Nuovi pseudoscorpioni cavernicoli appartenenti al sottogenere Blothrus Schioedte (diagnosi preliminari). Bollettino della Societa Entomologica Italiana 63: 125–127. -- Show included taxa
Pretner, E. & Strasser, K. (1931). Die Fauna der Nordfriauler Höhlen. Mitteilungen über Höhlen- und Karstforschung 9: 84–90. -- Show included taxa
Rabeler, W. (1931). Die Fauna des Göldenitzer Hochmoores in Mecklenburd (Mollusca, Isopoda, Arachnoidea, Myriapoda, Insecta). Zeitschrift für Morphologie und Ökologie der Tiere 21: 173–315. -- Show included taxa
Reimoser, E. (1931). Arachnoidea der Sunda-Expedition Rensch. Mitteilung aus dem Zoologischen Museum in Berlin 17: 744–752. -- Show included taxa
Ripper, W. (1931). Versuch einer Kritik der Homologiefrage der Arthropodentracheen. Zeitschrift für Wissenschaftliche Zoologie 138: 303–369. -- Show included taxa
Roewer, C.F. (1931). Arachnoiden aus südostalpinen Höhlen. Mitteilungen über Höhlen- und Karstforschung 9: 40–46. -- Show included taxa
Schnitnikov, V.N. (1931). Nastavlenie k sobiraniyu paukoobraznykh (Arachnoidea) [Manual to collecting of arachnids (Arachnoidea)]. Nastavleniya dlya Sobiraniya Zoologicheskikh Kollektsii, Izdavaemye Zoologicheskim Muzeem Akademii Nauk SSSR 18: 1–20. -- Show included taxa
Speijer, E.A.M. (1931a). Bemerkungen über Pedipalpi. Zoölogische Mededeelingen 14: 79–88. -- Show included taxa
Speijer, E.A.M. (1931b). Bemerkungen über Pedipalpi (Fortsetzung). Zoölogische Mededeelingen 14: 194–201. -- Show included taxa
Szalay, L. (1931a). Beiträge zur Kenntnis der Arachnoideen-fauna der Aggteleker Höhle. Annales Historico-Naturales Musei Nationalis Hungarici 27: 351–370. -- Show included taxa
Szalay, L. (1931b). Beiträge zur Kenntnis der Afterskorpion-und Milbenfauna des Retyezát-Gebirges. Annales Historico-Naturales Musei Nationalis Hungarici 27: 371. -- Show included taxa
Williams, F.X. (1931). Handbook of insects and other invertebrates of Hawaiian sugar cane fields. Experiment Station, HSPA, Honolulu. -- Show included taxa