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Willemse F. M. H., Helversen O. von, Odeé B., 2009: A review of Chorthippus species with angled pronotal lateral keels from Greece with special reference to transitional populations between some Peloponnesean taxa (Orthopera, Acrididae). 188 pp. (in English).  Zoologische Mededelingen 83(2): 319- 507.

Wiebes J. T., 1966: The structure of the ovipositing organs as a Tribal character in the Indo-Australian Sycophagine Torymidae (Hymenoptera, Chalcidoidea). 9 pp. [HYM 4332]  Zoologische Mededelingen 41(9): 151-159.

Wiebes J. T., 1967: Indo-Malayan and Papuan fig wasps (Hymenoptera, Chalcidoidea) 6. The genus Eujacobsonia grandi (Torymidae). 9 pp. [HYM 4334]  Zoologische Mededelingen 42(10): 107-115.

Wiebes J. T., 1968: Fig wasps from Israel. Ficus sycomorus and related east African species (Hymenoptera, Chalcidoidea) 2. Agaonidae (Concluded) and Sycophagini. 15 pp. [52556]  Zoologische Mededelingen 42(28): 307-321.

Wolf H., 1962: Priocnemis-Arten aus dem Senckenberg-Museum (Ins., Hym., Pompilidae). 4 pp. [HYM 4369]  Zoologische Mededelingen 43(5): 359-362.

Wiebes J. T., 1974: Philippine fig wasps 1. Records and descriptions of Otitesellini (Hymenoptera Chalcidoidea, Torymidae). 17 pp. [52560]  Zoologische Mededelingen 48(14): 145-161.

 Werding B., 1986: Die Gattung Neopisosoma Haig, 1960 im tropischen Westatlantic, mit der Beschreibung von Neopisosoma neglectum spec. nov. und Neopisosoma orientale spec. nov. (Crustacea: Anomura: Porcellanidae). 21 pp. [80714]  Zoologische Mededelingen 60(11): 159-179.

 Wells A., 1993: Micro-caddisflies (Trichoptera: Hydroptilidae) from Bali, Indonesia. 9 pp. [TRI 199]  Zoologische Mededelingen 67(25): 351-359.

Winter A. J. de, 2008: Costigulella primennilus spec. nov., a new minute western African terrestrial snail, with remarks on the genus Costigulella (Gastropoda Pulmonata: Streptaxidae). 7 pp.  Zoologische Mededelingen 82: 245-251.

Winter A. J. de, 2008: Redefinition of Thapsia Albers, 1860, and description of three more helicarionoid genera from western Africa (Gastropoda, Stylommatophora). 37 pp.  Zoologische Mededelingen 82: 441-477.

 Williams G. C., Lundsten L., 2009: The nephtheid soft coral genus Gersemia Marenzeller, 1878, with the description of a new species from the northeast Pacific and review of two additional nephtheid species (Ortocorallia: Alcyonacea). 15 pp.  Zoologische Mededelingen 83: 1067-1081.

 Weinberg S., 2013: Trichogorgia insulaeuropensis spec. nov., a new gorgonian from the Southern Indian Ocean (Coelenterata: Octocorallia: Alcyonacea: Chrysogorgiidae). 8 pp.  Zoologische Mededelingen 87(2-5): 405-412.

 Walters M. P., 2005: My life with eggs. 14 pp.  Zoologische Mededelingen Leiden 79 (3): 5-18.