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 Rakovič M., 1991: A treatise on some new and interesting Aphodius species with a list of species of the subgenus Nialus and related subgenera (Coleoptera, Scarabaeoidea, Aphodiidae). 16 pp. [B02] [B18] [M14] [M71] Annotationes Zoologicae et Botanicae 206: 1-16.

 Rakovič M., 1994: A review of species of the genus Psammodius (Coleoptera: Scarabaeoidea: Aphodiidae) of the Indian subcontinent. 10 pp. [M09] 

 Rakovič M., 1998: A key to species of the genus Granulopsammodius (Coleoptera: Scarabaeoidea: Aphodiidae) and description of a new species from Iran. 5 pp. [FHC 088] [M11] 

 Rakovič M., 2001: Review of Psammodiinae of New Caledonia with description of a new species (Coleoptera: Aphodiidae). 7 pp. ( pdf 50 CZK/2 EUR) Folia Heyrovskyana 9(1): 73-79.

 Rakovič M., Král D., 1996: A review of the Leiopsammodius species of the Malayan subregion (Coleoptera: Scarabaeoidea: Aphodiidae). 6 pp. [FHC 068] [M11] 

 Rakovič M., Mencl L., 2012: Linargius pangmalai gen. et sp. n. (Coleoptera: Aphodiidae: Aphodiinae: Aphodiini) from the Oriental Region. 6 pp. (in English).  Folia Heyrovskyana 20A(3-4): 105-110.

 Rambla M., 1976: XIX. Opiliones de Ecuador continental tres n. sp. del genero Stygnomma (Phalangodidae). 22 pp. 

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 Rambousek F., 1922: O katastrofálním rozšíření zaviječe řepového (Phyctaenodes sticticalis L.). 26 pp. 

 Rambousek F., 1927: Periodický výskyt hmyzu. 3 pp. [INS 415] Acta Societatis entomologicae Cechosloveniae 24: 91-93.

 Ramellini P., 2000: Note su Campodeidi del Piedmonte (Diplura, Campodeidae). 12 pp. [APT 125] Rivista plemontese di Storia naturale 21: 103-114.

 Ramil F., Parapar J., Vervoort W., 1992: The genus Sertularella Gray, 1848 (Cnidaria: Hydroida) along the coasts of Galicia (Spain). 32 pp. 

 Ramil F., Vervoort W., 1992: Pseudoplumaria gen. nov. a new Atlantic genus of the family Plumulariidae (Cnidaria: Hydrozoa). 8 pp. [EVE 605] Zoologische Mededelingen 66(36): 485-492.

 Ramil F., Vervoort W., 2004: Note on Aglaophenopsis cartieri (Bedot, 1921) (Cnidaria: Leptolida: Aglaopheniidae) and discussion of its taxonomic position. 8 pp. Zoologische Mededelingen Leiden 78: 257-264.

 Ramil F., Vervoort W., 2008: Note on Streptocaulus multiseptatus (Bale, 1915) (Cnidaria: Leptolida: Aglaopheniidae), with the description of its gonosome. 6 pp. Zoologische Mededelingen 82: 417-422.

 Rampini M., Carchini G., Sbordoni V., 1983: Ecologia di popolazione di Dolichopoda geniculata (Costa) in una cavita artificiale del sottosuolo di Roma (Orthoptera, Rhaphidophoridae). 15 pp. Fragmenta entomologica 17(1): 85-99.

 Randall J. E., Greenfield D. W., 2007: Redescription of Gnatholepis cauerensis (Bleeker, 1853), with discussion of the validity of the species. 6 pp. Zoologische Mededelingen Leiden 81: 303-308.

 Ranzani-Paiva M. J. T., Ishikawa C. M., 1996: Haematological characteristics of freshwater-reared and wild mullet, Mugil platanus Günther (Osteichthyes, Mugilidae). 8 pp. Revta bras. Zool. 13(3): 561-568.

 Ranzani-Paiva M. J. T., Ishikawa C. M., Campos B. E. S., Eiras A. C., 1997: Haematological characteristics associated with parasitism in mullets, Mugil platanus Günther, from the estuarine region of Cananéia, Sao Paulo, Brazil. 11 pp. Revta bras. Zool. 14(2): 329-339.

 Ranzani-Paiva M. J. T., Tabata Y. A., Eiras A. C., 1998: Hematologia comparada entre diplóides e triplóides de truta arco-íris, Oncorhynchus mykiss Walbaum (Pisces, Salmonidae). 10 pp. Revta bras. Zool. 15(4): 1093-1102.

 Rapp Py-Daniel, L. H., 1985: Dekeyseria amazonica, novo genero e nova espécie na regiao amazônica, Brasil, e Dekeyseria scaphirhyncha (Kner, 1854) nova combinaçao (Loricariidae: Siluriformes). 15 pp. Amazoniana 9(2): 177-191.

 Rappard I. F. W., Karstel H. R., 1960: Eiwitbehoefte, jacht en inzameling. 3 pp. (in Dutch). Overdruk van Ned. Nieuw-Guinea 5: 2-4.

 Rasmussen P. C., 2005: Biogeographic and conservation implications of revised species limits and distributions of South Asian birds. 10 pp. Zoologische Mededelingen Leiden 79 (3): 137-146.

 Rasnitsyn A. P., 1965: Materialy do poznania biologii, systematyki i filogenezy rosliniarek z podrodziny Xyelinae (Hymenoptera, Xyelidae). 37 pp. [M52] Polskie Pismo Entomologiczne 35: 483-519.

 Raso J. E. G., 1984: Brachyura of the coast of Southern Spain (Crustacea, Decapoda). 9 pp. Spixiana 7: 105-113.

 Rataj K., 1972: Revision of the genus Sagittaria. Part I. Old World species. 36 pp. [M14] 

 Rataj K., 1972: Revision of the genus Sagittaria. Part II. The species of West Indies, Central and South America. 60 pp. [M14] 

 Rataj K., 1983: V pralesích Amazonie, cestopisné vyprávění o přírodě Amazonie, bar. fotografie, 142 s. 

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 Rath O., 1895: Zur Conservirungstechnik. 9 pp. (in German). Anatomischer Anzeiger 11(9): 280-288.

 Ratschker U. M., Roth M., 2000: Vergleich von Spinnenzönosen auf biologisch-dynamisch und konventionell bewirtschafteten Äckern der nordostdeutschen Tiefebene. 6 pp. (in German). Mitt. Dtsch. Ges. Allg. Angew. Ent. 12: 359-364.

 Raulin M., 1890: Influence de la nature du terrain sur la température du sol. 16 pp. (in French). 

 Ravizza C., 1976: Una nuova specie di Nemouridae dell’Appennino settentrionale (Plecoptera). 6 pp. [PLE28] Fragmenta entomologica 12(2): 127-132.

 Ravizza Dematteis E., Ravizza C., 1984: Leuctra ligurica Aubert (Plecoptera), la piú caratteristica specie invernale della plecoptterofauna Italiana. 7 pp. Fragmenta entomologica 17(2): 221-227.

 Rawlings G. B., 1957: Guiglia schauinslandi (Ashmead) (Hym. Orussidae) a parasite of Sirex noctilio (Fabricius) in New Zealand. 2 pp. [M43] 

 Ray E., 1937: Synopsis of the Puerto Rican Beetles of the Genus Mordellistena, with descriptions of new species. 11 pp. 

 Raymond M. G., 1882: Observations sur l’organisation et les moeurs du Nematus ribesii Scopoli. 26 pp. 

 Razdoburdin V. A., Sinelnikov E. A., 1999: Intraspecific interactions of spider mite Tetranychus urticae K. and onion thrips Thrips tabaci L. on different cucumber cultivars. I. Influence of spider mite on population dynamics of onion thrips. 11 pp. (in Russian). Entomologitsheskoe obozrenie 78(2): 296-306.

 Razowski J., 1958: New and little known Palaearctic species of the genus Cnephasiini (Lepidoptera, Tortricidae). 46 pp. Acta zoologica cracoviensia 2/25: 563-605.

 Razowski J., 1961: Notes on some little known Tortricidae (Lepidoptera). 37 pp. [M54] Acta zoologica cracoviensia 5/14: 662 -670.

 Razowski J., 1961: Studies on Cochylidae (Lepidoptera). Part IV. New and little known Palaearctic Cochylidae. 12 pp. [M54] Acta zoologica cracoviensia 6/1: 1-8.

 Razowski J., 1961: Studies on Cochylidae (Lepidoptera). Part VI. Remarks on types of some Cochylidae. 19 pp. [31216] Polskie Pismo Entomologiczne 31: 301-319.

 Razowski J., 1963: Tortricoidea (Lepidoptera) from Iran. 27 pp. [M54] Acta zoologica cracoviensia 8/: 252-277.

 Razowski J., 1964: A discussion of some groups of Tortricini (Tortricidae, Lepidoptera) with descriptions of new genera and species. 59 pp. [M54] Acta zoologica cracoviensia 9/5: 358-415.

 Razowski J., 1964: Studies on the Cochylidae (Lepidoptera). Part IX. Revision of Caradja’s collection with descriptions of new species. 18 pp. [M14] [M54] Acta zoologica cracoviensia 9/4: 338-354.

 Razowski J., 1967: South American Cochylidae (Lepidoptera) from the collection of the British Museum (Natural History). 2 colour plates, 91 figs. 50 pp. [31225] [M54] Acta zoologica cracoviensia 12/8: 163-210.

 Razowski J., 1968: Revision of the Generic Group Agapeta Hübner (Lepidoptera: Cochylidae). 30 pp. [31226] [M31] [M54] [M57] Acta zoologica cracoviensia 13/4: 73-100.

 Razowski J., 1968: Revision of the generic group Cochylis Treitschke (Lepidoptera, Cochylidae). 17 pp. [31227] [M31] [M54] [M57] Acta zoologica cracoviensia 13/6: 131-147.

 Razowski J., 1968: Revision of the genus Eupoecilia Stephens (Lepidoptera, Cochylidae). 28 pp. [31228] [M31] [M54] [M57] Acta zoologica cracoviensia 13/5: 103-130.