- Rabida Island
- radial
- radiata
- Rafetus
- ramus
- raniceps
- reevesii
- reimanni
- relict
- reproduction
- respiration
- reticularia
- reticulate
- rhamphotheca
- Rheodytes
- Rhinoclemmys
- rhizophorarum
- rhodesianus
- rhomboidal
- rivulata
- rogerbarbouri
- rossignonii
- rostral scale
- rostral shield
- rostrum
- rubida
- rubriventris
- rudiment
- rufipes
- rugosa
- rustamovi