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- Raja: (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja abyssicola (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja alba (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja asterias (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja batis (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja binoculata (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja clavata (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja miraletus (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja montagui (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja naevus (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja oxyrhynchus (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja radiata (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja radula (Chordata, Chondrichthyes, Rajiformes, Raja)
- Raja undulata (Chordata, Chondrichthyes, Rajiformes, Raja)
- Rallietina sartica: (Platyhelminthes, Cestoda, Cyclophyllidea, Rallietina)
- Rallus: (Chordata, Aves, Gruiformes, Rallus)
- Rallus aquaticus (Chordata, Aves, Gruiformes, Rallus)
- Rallus caerulescens (Chordata, Aves, Gruiformes, Rallus)
- Rallus elegans (Chordata, Aves, Gruiformes, Rallus)
- Rallus limicola (Chordata, Aves, Gruiformes, Rallus)
- Rallus longirostris (Chordata, Aves, Gruiformes, Rallus)
- Rallus pectoralis (Chordata, Aves, Gruiformes, Rallus)
- Ramphastos: (Chordata, Aves, Piciformes, Ramphastos)
- Ramphastos sulfuratus (Chordata, Aves, Piciformes, Ramphastos)
- Ramphastos swainsonii (Chordata, Aves, Piciformes, Ramphastos)
- Ramphocelus passerinii: (Chordata, Aves, Passeriformes, Ramphocelus)
- Ramphocinclus brachyurus: (Chordata, Aves, Passeriformes, Ramphocinclus)
- Rana catesbeiana: (Chordata, Amphibia, Anura, Rana)
- Rana pipiens: (Chordata, Amphibia, Anura, Rana)
- Rana temporaria: (Chordata, Amphibia, Anura, Rana)
- Ranatra linearis: (Chordata, Insecta, Hemiptera, Ranatra)
- Rangifer tarandus: (Chordata, Mammalia, Artiodactyla, Rangifer)
- Ranzania: (Chordata, Actinopterygii, Tetraodontiformes, Ranzania)
- Ranzania laevis (Chordata, Actinopterygii, Tetraodontiformes, Ranzania)
- Ranzania truncata (Chordata, Actinopterygii, Tetraodontiformes, Ranzania)
- Raphicerus: (Chordata, Mammalia, Artiodactyla, Raphicerus)
- Raphicerus campestris campestris (Chordata, Mammalia, Artiodactyla, Raphicerus)
- Raphicerus neumanni (Chordata, Mammalia, Artiodactyla, Raphicerus)
- Raphicerus melanotis (Chordata, Mammalia, Artiodactyla, Raphicerus)
- Raphicerus sharpei (Chordata, Mammalia, Artiodactyla, Raphicerus)
- Rastrelliger canagurta: (Chordata, Actinopterygii, Scombriformes, Rastrelliger)
- Rattus: (Chordata, Mammalia, Rodentia, Rattus)
- Rattus natalensis (Chordata, Mammalia, Rodentia, Rattus)
- Rattus norvegicus (Chordata, Mammalia, Rodentia, Rattus)
- Rattus rattus (Chordata, Mammalia, Rodentia, Rattus)
- Rattus alexandrinus (Chordata, Mammalia, Rodentia, Rattus)
- Rattus frugivorus (Chordata, Mammalia, Rodentia, Rattus)
- Ratufa: (Chordata, Mammalia, Rodentia, Ratufa)
- Ratufa indica (Chordata, Mammalia, Rodentia, Ratufa)