Ubick D., 2005: New genera and species of cribellate Coelotine spiders from California (Araneae: Amaurobiidae). 32 pp. (in English). Proceedings of the California Academy of Sciences 56(24): 305-336.

 Uetz G. W., Stratton G. E., 1983: Communication in spiders. 6 pp. 

 Ugarte E., Arriagada J., 1983: Presencia de Arachnitis uniflora Phil. (Corsiaceae) en la peninsula de Hualpen, concepcion, Chile. 4 pp. 

 Urhan R., 1997: Two new species of mites of the family Zerconidae from Turkey (Acari: Mesostigmata). 8 pp. [ARA1722] Genus 8(3-4): 735-742.

 Usher M. B., Davis P. R., 1983: The biology of Hypoaspis aculeifer (Canestrini) (Mesostigmata): in there a tendency towards social behaviour 8 pp. 

 Ushiwata C. T., Sautter K. D., Kobiyama M., 1995: Influence of compaction of a forest soil on the soil fauna in a subtropical region. I. Oribatei (Acari, Cryptostigmata) and Collembola (Insecta). 9 pp. Revta bras. Zool. 12(4): 905-913.

 Uzenbaev S. D., 1990: Struktura naselenija i sezonnaja dinamika čislennosti paukov čerpetobija elnika zelenomošnogo. 8 pp.