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.

 Razzetti E., Nardi P. A., Strosselli S., Bernini F., 2001: Prima segnalazione di Misgurnus anguillicaudatus (Cantor, 1842) in acque interne italiane (Osteichthyes: Cobitidae). 6 pp. [PSC83] Annali del Museo Civico di Storia Naturale ‘Giacomo Doria’ 93(1999-2000): 559-563.

 Reddell J. R., Mitchell R. W., 1971: A checklist of the cave fauna of Mexico. I. Sierra de El Abra, Tamaulipas and San Luis Potosi. 44 pp. 

 Reddell J. R., Mitchell R. W., 1971: A checklist of the cave fauna of Mexico. II. Sierra de Guatemala, Tamaulipas. 35 pp. 

 Redline A. D., 1997: Revision of the wind river faunas, early eocene of Central Wyoming. Part 13. Systematics and Phylogenetic pattern of early eocene Hyopsodus (Mammalia: Condylarthra). 81 pp. 

 Reese D., 2002: On the incised cattle scapulae from the East Mediterranean and Near East. 16 pp. Bonner zoologische Beiträge 50(3): 183-198.

 Řehoř F., Řehořová M., 1973: Karbonská makrofauna strukturního vrtu Stonava z moravské části hornoslezské pánve. [Die karbonische Makrofauna der Strukturbohrung Stonava aus dem mährischen Teil des Oberschlesischen Beckens.] 10 pp. (in Czech). Acta Musei Silesiae 22A: 39-48.

 Řehoř F., Řehořová M., 1978: Karbonská makrofauna hlubokého vrtu Němčičky 1 z moravské části Vídeňské pánve. Die karbonische Makrofauna der im mährischen Teil des Wiener Beckens niedergebrachten Tiefbohrung Němčičky 1. 4 pp. (in Czech). Acta Musei Silesiae 27A: 61-64.

 Řehulka J., 1996: Investigation of the Javornický brook with respect to fishing management and environment conservation. 16 pp. [80136] Acta Universitas Carolinae, biol. 40(1-2): 177-192.

 Reichholf J., 1976: Faunistische Daten zur Vogelwelt der Stauseen am unteren Inn (2). 8 pp. 

 Reichholf J., 1977: Die Avifauna der zentralasiatischen Republiken der UdSSR: ornithogeographische Aspekte. 3 pp. Spixiana 1(2): 137-139.

 Reichholf J., 1977: Die Avifauna der zentralasiatischen Republiken der UdSSR: ornithogeographische Aspekte. 3 pp. [AVE 269] Spixiana 1(2): 137-139.

 Reichholf J., 1978: Faunistische Daten zur Vogelwelt der Stauseen am unteren Inn (4). 10 pp. 

 Reichholf J., 1979: Die Artabgrenzung im Tierreich, eine „Evolutionär Stabile Strategie”  Spixiana 2: 201-

 Reichholf J., 1980: Jahreszeit- und Biotopabhängigkeit der Rudelbildung beim Rehwild (Capreolus capreolus L.). 16 pp. Spixiana 3(2): 193-208.

 Reichholf J., 1982: Höhe und Verteilung der Straßenmortalität von Hauskatzen (Felis sylvestris f. catus). 8 pp. [MAM236] Spixiana 5(1): 61-68.

 Reichholf J., 1983: Nehmen die Straßenverkehrsverluste Einfluß auf die Bestandsentwicklung des Igels (Erinaceus europaeus) 5 pp. Spixiana 6(1): 87-91.

 Reichholf J., 1989: Die Fischfauna des unteren Inn: eine Übersicht. 4 pp. 

 Reinert B. L., Pinto J. C., Bornschein M. R., Pichorim M., Marini M. Á., 1996: Body masses and measurements of birds from Southern Atlantic Forest, Brazil. 6 pp. Revta bras. Zool. 13(4): 815-820.

 Reinig W. F., 1950: Chorologische Voraussetzungen für die Analyse von Formenkreisen. 33 pp. 

 Reis K. R., Steadman D. W., 1999: Archaeology of trants, Montserrat. Part 5. Prehistoric avifauna. 13 pp. Annals of Carnegie Museum 68(4): 275-287.

 Reis N. R., Peracchi A. L., Onuki M. K., 1993: Quirópteros de Londrina, Paraná, Brasil (Mammalia, Chiroptera). 11 pp. Revta bras. Zool. 10(3): 371-381.

 Reisz R. R., Sutherland T. E., 2001: A diadectid (Tetrapoda: Diadectomorpha) from the lower permian fissure fills fo the dolese quarry, near Richards Spur, Oklahoma. 10 pp. Annals of Carnegie Museum 70(2): 133-142.

 Reiter A., Andreas M., Benda P., Lípa M., Wolf P., 1995: Mammalian fauna of the Svjatoj Nos peninsula and isthmus, the Baikal Lake, Russia. 17 pp. [MAM 166] Acta Societatis Zoologicae Bohemiae 59: 209-225.

 Reitz E. J., 1994: Archaeology of Trants, Montserrat. Part 2. Vertebrate fauna. 21 pp. Annals of Carnegie Museum 63(4): 297-317.

 Rekovets L. I., 1995: Periglacial micromammal faunas from the Late Pleistocene of Ukraine. 10 pp. [MAM 167] Acta zoologica cracoviensia 38(1): 129-138.

 Renet J., 2005: Contribution a la connaissance de l’avifaune du Parc Naturel Départemental de la Grande Corniche (Alpes-Maritimes, France). Premiers résultats d’une année de prospection (Aves). 29 pp. Biocosme Mésogéen 22(3): 125-153.

 Renet J., 2005: L’Alouette calandrelle Calendrella brachydactyla subsp. brachydactyla, une nouvelle espece nicheuse dans le département des Alpes-Maritimes (France). 1er cas de nidification, sur le plateau de Calern. 7 pp. Biocosme Mésogéen 22(2): 97-103.

 Řepa P., 1979: Ptactvo samoty Rozcestí u Rozvadova v Českém lese. 11 pp. 

 Reteuna D., 1994: La migrazione degli accipitriformes, falconiforems e ciconiiforms attraverso le Valli di Lanzo. 27 pp. 

 Retzer M. E., Page L. M., 1996: Systematics of the Stick Catfishes, Farlowella Eigenmann and Eigenmann (Pisces, Loricariidae). 54 pp. 

 Ribeiro M. G., Teles M. E. O., Maruch S. M. G., 1995: Morphological aspects of the ovary of Columba livia (Gmelin) (Columbidae, Columbiformes). 7 pp. Revta bras. Zool. 12(1): 151-157.

 Ribeiro M. G., Teles M. E. O., Maruch S. M. G., 1997: Histologia e histoquímica do magno, um dos segmentos do oviduto de Numida meleagris (Linné) (Numididae, Galliformes). 8 pp. Revta bras. Zool. 14(1): 213-220.

 Rice D. W., Scheffer V. B., 1968: A list of the marine mammals of the World. 16 pp. 

 Richmond C. W., 1895: Description of a new species of Ant Thrush from Nicaragua. 2 pp. 

 Richmond C. W., 1895: Partial list of birds collected at Alta Mira, Mexico, by Mr. Frank B. Armstrong. 6 pp. 

 Richmond C. W., 1896: Catalogue of a collection of birds made by Doctor W. L. Abbott in Eastern Turkestan, the Thian-Shan Mountains, and Tagdumbash Pamir, Central Asia, with notes on some of the species. 23 pp. 

 Richmond C. W., 1896: Catalogue of a collection of birds made by Doctor W. L. Abbott in Kashmir, Baltistan and Ladak, with notes on some of the species, and a description of a new species of Cyanecula. 43 pp. 

 Richmond C. W., 1897: Catalogue of a collection of birds made by Doctor W. L. Abbott in Madagascar, with descriptions of three new species. 18 pp. 

 Richmond C. W., 1900: Description of a new bird of the genus Dendrornis. 2 pp. 

 Richmond C. W., 1900: Descriptions of three new birds from Lower. 3 pp. 

 Richmond C. W., 1902: List of generic terms proposed for birds during the years 1890 to 1900, inclusive, to which are added names omitted by Waterhouse in his “Index Generum Avium”. 67 pp. 

 Richmond C. W., 1903: Birds collected by Dr. W. L. Abbott and Mr. C. B. Kloss in the Andaman and Nicobar islands. 28 pp. 

 Richmond C. W., 1903: Birds collected by Dr. W. L. Abbott on the Coast and Islands of Northwest Sumatra. 40 pp. 

 Richmond C. W., 1909: Generic names applied to birds during the years 1901 to 1905, inclusive, with further additions to Waterhouse‘s „Index generum avium.“ 71 pp. 

 Richmond C. W., 1917: Generic names applied to birds during the years 1906 to 1915, inclusive, with additions and corrections to Waterhouse’s “Index Generum Avium”. 72 pp. 

 Richmond C. W., 1917: Generic names applied to birds during the years 1906 to 1915, inclusive, with additions and corrections to Waterhouse’s “Index Generum Avium”. 72 pp.  Discount 20%!

 Richter M., Breitkreuz C., 1997: Permian fish remains from the peine formation of northern Chile. 14 pp. 

 Ridgway R., 1889: A review of the genus Sclerurus of Swainson. 11 pp. 

 Ridgway R., 1889: A review of the genus Xiphocolaptes of Lesson. 20 pp. Proceedings of the United States National Museum for the year 1889. Volume XII.