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.

 Ubick D., Briggs T. S., 1992: The harvestman family Phalangodidae. 3. Revision of Texella Goodnight and Goodnight (Opiliones: Laniatores). 86 pp. (in English). Texas Mem. Mus., Speleol. Monogr. 3: 155-240.

 Ubik K., Křeček J., Vašíčková S., 1982: Defensive secretion of the Cuban millipede Rhinocricus duvernoyi (Diplopoda, Spirobolida). 2 pp. 

 Ubik K., Křeček J., Vašíčková S., 1982: Defensive secretion of the Cuban millipede Rhinocricus duvernoyi (Diplopoda, Spirobolida). 2 pp. Acta entomologica Bohemoslovaca 79: 468-469.

 Udekem d’Acoz C. d’, 2004: The genus Bathyporeia Lindström, 1855, in western Europe (Crustacea: Amphipoda: Pontoporeiidae). 162 pp. (in English). Zoologische Verhandelingen 348: 1-162.

 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. 

 Uit de Weerd D. R., Schneider D., Gittenberger E., 2009: Molecular phylogenetic relationships of Inchoatia taxa. 4 pp. Zoologische Mededelingen 83: 589-592.

 Ujvári Z., 2010: Zercon myriasetosus sp. n., an extraordinary species of the family Zerconidae (Acari: Mesostigmata). 6 pp. (in English). Genus 21(2): 309-314.

 Ujvári Z., 2011: New records of Prozercon Sellnick, 1943 species from Croatia, with description of a new species (Acari: Mesostigmata: Zerconidae). 13 pp. Genus 22(4): 677-689.

 Uličný J., 1884: Bericht über bei Brünn gesammelte Myriopoden. 5 pp. 

 Unsöld M., Melzer R. R., 2003: Myriapoda aus der Zoologischen Staatssammlung München: Die Scutigeromorpha der Sammlung Verhoeff (Chilopoda, Notostigmophora). 8 pp. Spixiana 26(3): 209-216.

 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.

 Urhan R., 2001: Studies on mites of the genus Zercon Koch from Turkey (Acari: Gamasida: Zerconidae). 9 pp. [ARA1723] Genus 12(4): 589-597.

 Uribe R. A., Nakamura K., Indacochea A., Pacheco A. S., Hooker Y., Schrödl M., 2013: A review on the diversity and distribution of opisthobranch gastropods from Peru, with the addition of three new records (Gastropoda, Heterobranchia). 18 pp. Spixiana 36(1): 43-60.

 Ushakov P. V., 1953: Novye vidy mnogoshtshetinkovych tshervej iz semejstva Phyllodocidae (Polychaeta). 3 pp. 

 Ushakov P. V., 1955: Mnogoščetinkovye červy (Polychaeta) dalnevostočnych morej SSSR. [Guide to the fauna of the UdSSR]. 445 pp.  Discount 50%!

 Ushakov P. V., 1972: Polychaeta: Phyllodociformia: Phyllodocidae, Alciopidae, Tomopteridae, Typhloscolecidae, Lacydoniidae. Fauna SSSR. 272 pp.  Discount 50%!

 Usher M. B., Booth R. G., 1986: Arthropod communities in a maritime Antarctic moss-turf habitat: multiple scales of pattern in the mites and Collembola. 16 pp. 

 Usher M. B., Booth R. G., Sparkes K. E., 1982: A review of progress in understanding the organization of communities of soil arthropods. 19 pp. 

 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.

 Utech L., 1962: Blattminen und Pflanzengallen aus Albanien und dem Kaukasus. 7 pp. [GAL 36] Deutsche Entomologische Zeitschrift (N.F.) 9: 229-235.

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