Ng P. K. L., 1991: On two species of Archipelothelphusa Bott, 1969 (Crustacea: Decapoda: Brachyura: Sundathelphusidae) from Luzon, Philippines. 12 pp. 

 Ng P. K. L., 1992: On a new species of blackwater prawn, Macrobrachium oxyphilus (Crustacea: Decapoda: Caridea: Palaemonidae), from peat swamps in Peninsular Malaysia. 7 pp. 

 Ng P. K. L., 2002: New species and new record of box crabs (Calappa) (Crustacea: Decapoda: Brachyura: Calappidae) from the Philippines. 20 pp. Journal of Taiwan Museum 55(1): 41-60.

 Ng P. K. L., Liu H.-C., Wang C.-H., 1998: A newly recorded land crab, Epigrapsus notatus (Heller, 1865) (Crustacea: Decapoda: Brachyura: Gecarcinidae) from Taiwan. 12 pp. Journal of Taiwan Museum 51(2): 71-82.

 Ng P. K. L., Wang C.-H., 1994: Notes on the Enigmatic genus Pseudozius Dana, 1851 (Crustacea, Decapoda, Brachyura). 17 pp. Journal of Taiwan Museum 47(1): 83-99.

 Nguyen Duy-Jacquemin M., 1989: Ultrastructure des sensilles basiconiques bacilliformes des antennes du Diplopode cavernicole, Typhloblaniulus lorifer Bröl. (Myriapode, Diplopode). 6 pp. 

 Nguyen Duy-Jacquemin M., 1993: Convergences évolutives entre Diplopodes pénicillates vivant dans des grottes. 9 pp. 

 Nicolai V., 1987: Anpassungen rindenbesiedelnder Arthropoden an Borkenstruktur und Feinddruck. 7 pp. Spixiana 10(2): 139-145.

 Nicolai V., 1993: The arthropod fauna on the bark of deciduous and coniferous trees in a mixed forest of the Itasca State Park, MN, USA. 9 pp. Spixiana 16: 61-69.

 Niedbala W., 1998: Ptyctimous mites of the Pacific Islands. Recent knowledge, origin, descriptions, diagnoses and zoogeography (Acari: Oribatida). 128 pp. Genus 9(4): 431-558. Discount 50%!

 Nielsen L. B., 1968: Investigations on the microfauna of leaf litter in a danish beech forest. 9 pp. 

 Niem V. H., 1993: Phylogenetic and systematic position of Sesarma rubripes Rathbun, 1897 (Brachyura: Grapsidae). 11 pp. 

 Niermann U., 2010: Occurrence of Mnemiopsis leidyi A. Agassiz, 1865 and Beroe ovata Mayer, 1912 (Ctenophora) off the Belizean coast during February 2009. 18 pp. (in English). Verhandlungen des Naturwissenchaftlingen Vereins in Hamburg 45: 33-50.

 Nierstrasz H. F., Brender á Brandis G. A., 1930: Three new genera and five new species of parasitic Crustacea. 9 pp. 

 Niikawa I., 1986: On large rugose corals from the lower carboniferous of Fukuji, Gifu Prefecture. 7 pp. (in Japanese). Memoirs of the National Science Museum 19: 71-77.

 Nishikawa T., 1986: Some ascidians dredged around the Oki Islands, the Japan Sea. 10 pp. Memoirs of the National Science Museum 19: 175-184.

 Noodt W., 1973: Artenreichtum und Monardsches Prinzip bei Crustacea des Limnopsammons der Neotropis. 7 pp. Amazoniana 4(3): 255-261.

 Novaretti A., 1990: Osservazioni su una particolare forma di Bolivina nei livelli diatomitici della successione di Marmorito. 5 pp. Bolletino del Museo regionale di Scienze Naturali – Torino 8(1): 243-247.

 Novikova S. I., 1971: Fauna nematod lesnoj podstilki. 10 pp. 

 Nowikoff M., 1939: Über den Bau der Leuchtzellen von Lampyris noctiluca. 8 pp. 

 Núnez J., Brito M. C., 2002: Nereididae (Annelida, Polychaeta) colectados en las campanas “Fauna II, III, IV” (Proyecto “Fauna Ibérica”) y catálogo de las especies conocidas para el ámbito Ibérico. 9 pp. [81127] Graellsia 58(1): 39-47.

 Obata I., Futakami M., Suzuki T., 1991: Eubostrychoceras densicostatum Matsumoto, a large Heteromorph ammonite species, from the Upper Cretaceous of Wakkanai in Hokkaido. 7 pp. Memoirs of the National Science Museum 24: 27-33.

 Ocana A., Brito A., Nunez J., 1992: A new species of Sarcodictyon (Anthozoa: Stolonifera) from Tenerife, Canry Islands. 6 pp. 

 Ocana A., Brito A., Nunez J., 1992: A new species of Sarcodictyon (Anthozoa: Stolonifera) from Tenerife, Canry Islands. 6 pp. [EVE 543] Zoologische Mededelingen 66(31): 423-428.

 Ocana A., Hernández J. A., Monterrubio E., 1999: Description of Achromadora gracilis n. sp. and observations on A. micoletzkyi (Stefanski, 1915) Van der Linde, 1938 and Ethmolaimus multipapillatus Paramonov, 1926 (Nematoda: Chromadorida) from Spanish lakes. 12 pp. 

 Ocana A., Hernández J. A., Monterrubio E., 1999: Description of Achromadora gracilis n. sp. and observations on A. micoletzkyi (Stefanski, 1915) Van der Linde, 1938 and Ethmolaimus multipapillatus Paramonov, 1926 (Nematoda: Chromadorida) from Spanish lakes. 12 pp. [EVE 544] Zoologica Baetica 10: 3-14.

 Ocana A., Sanchéz Tocino L., 2005: Spawning of Holothuria tubulosa (Holothurioidea, Echinodermata) in the Alboran sea (Mediterranean Sea). 4 pp. Zoologica Baetica 16: 147-150.

 Ocana A., Sanchéz Tocino L., San Martín G., 2005: Description of egg masses of three species of sedentary polychaetes of the Mediterranean sea. 5 pp. Zoologica Baetica 16: 165-169.

 Ocana A., Tocino L. S., López-Gonzáles P. J., 2001: Faunistic and biogeographical observations concerning the Anthozoa (Cnidaria: Anthozoa) of the Granada coast (Sea of Alboran). 9 pp. [EVE 545] [80114] Zoologica Baetica 11(2000): 51-65.

 Odier F., Vago C., Lamy M. E., 1974: Persistence of virus of vertebrates in the hemocoel of insects: Study on the Poliovirus into the larvae of Coleoptera. 7 pp. (in French). [EVE 948] [COL 1664]  Annales de la Societe entomologique de France (N.S.) 10(2): 449-455.

 Ofwegen L. P. van, 1989: On Wrightella coccinea (Ellis & Solander, 1786) and Wrightella stiasnyi spec. nov. (Anthozoa: Gorgonacea: Melithaeidae). 8 pp. Zoologische Mededelingen Leiden 63(3): 27-34.

 Ofwegen L. P. van, 1990: Notes on the Keroeididae (Anthozoa: Gorgonacea) collected in 1963 and 1964 by the international Indian ocean expedition of the r/v “Anton Bruun”, in the Indian ocean, with the description of a new species, Lignella hartogi. 6 pp. Zoologische Mededelingen Leiden 63(13): 163-168.

 Ofwegen L. P. van, 2005: A new genus of nephtheid soft corals (Octocorallia: Alcyonacea: Nephtheidae) from the Indo-Pacific. 236 pp. Zoologische Mededelingen Leiden 79(4): 1-236.

 Ofwegen L. P. van, 2008: The genus Sinularia (Octocorallia: Alcyonacea) at Palau, Micronesia. 105 pp. Zoologische Mededelingen 82: 631-735.

 Ofwegen L. P. van, 2008: The genus Sinularia (Octocorallia: Alcyonacea) from Bremer and West Woody islands (Gulf of Carpentaria, Australia). 35 pp. Zoologische Mededelingen 82: 131-165.

 Ofwegen L. P. van, Alderslade P., 2007: A new species of Alertigorgia (Coelenterata: Octocorallia: Anthothelidae) from the Indo Malayan region. 8 pp. Zoologische Mededelingen Leiden 81: 241-249.

 Ofwegen L. P. van, Benayahu Y., 1992: Notes on Alcyonacea (Octocorallia) from Tanzania. 16 pp. 

 Ofwegen L. P. van, Benayahu Y., 1992: Notes on Alcyonacea (Octocorallia) from Tanzania. 16 pp. [EVE 546] Zoologische Mededelingen 66(6): 139-154.

 Ofwegen L. P. van, Hermanlimianto M. I. Y. T., 2014: Siboga plexaurids (Coelenterata: Octocorallia) re-examined. 40 pp. Zoologische Mededelingen 88(1-4): 19-58.

 Ofwegen L. P. van, Vennam J., 1991: Notes on Octocorallia from the Laccadives (SW India). 12 pp. 

 Ofwegen L. P. van, Vennam J., 1991: Notes on Octocorallia from the Laccadives (SW India). 12 pp. [EVE 547] Zoologische Mededelingen 65(9): 143-154.

 Ofwegen L. P. van, Vennam J., 1994: Results of the Rumphius biohistorical expedition to Ambon (1990). Part 3. The Alcyoniidae (Octocorallia: Alcyonacea). 24 pp. 

 Omori M., Vervoort W., 1986: Observations on a living specimen of the giant hydroid branchiocerianthus imperator. 5 pp. Zoologische Mededelingen 60(16): 257-261.

 Opravilová V., Vaňhara J., Sukop I., 1999: Aquatic invertebrates of the Pálava Biosphere Reserve of UNESCO. 279 pp.  Discount 20%!

 Opresko D. M., 2001: Revision of the Antipatharia (Cnidaria: Anthozoa). Part I. Establishment of a new family, Myriopathidae. 28 pp. Zoologische Mededelingen Leiden 75(17): 343-370.

 Opresko D. M., 2004: Revision of the Antipatharia (Cnidaria: Anthozoa). Part IV. Establishment of a new family, Aphanipathidae. 31 pp. Zoologische Mededelingen Leiden 78: 209-240.

 Opresko D. M., 2005: New genera and species of antipatharian corals (Cnidaria: Anthozoa) from the North Pacific. 37 pp. Zoologische Mededelingen Leiden 79 (2): 129-165.

 Opresko D. M., 2006: Revision of the Antipatharia (Cnidaria: Anthozoa). Part V. Establishment of a new family, Stylopathidae. 30 pp.  Zoologische Medelingen 80(4): 109-138.

 Opyrchalowa J., Sadkowska H., 1962: Wystepowanie kedzierzawki plaszczyncowej – Beta virus 3 (Wille) Smith oraz zóltaczki wirusowej – Beta virus 4 (Roland et Quanjer) Smith na burakach cukrowych, jako wskaznik pojawu plaszczynca burakowego – Piesma quadrata Fieb., i mszycy burakowej – Aphis fabae Scop., w województwie wroclawskim w r. 1961. 11 pp. 

 Ortega I., Díaz Y. J., Martín A., 2010: Feeding rates and food preferences of the amphipods present on macroalgae Ulva sp. and Padina sp. Tasas de alimentación y preferencias alimenticias de los anfípodos presentes en las algas Ulva sp. y Padina sp. 9 pp. Zoologica Baetica 21: 45-53.