- gabonensis
- gaigeae
- galbinifrons
- galloitalica
- gametes
- gangeticus
- ganglion
- gastropod
- gastrula
- geniculate ganglion
- Geochelone
- Geoclemys
- Geoemyda
- geoffroanus
- geographica
- geometricus
- georgesi
- gibbonsi
- gibbus
- gigantea
- gigaorder
- gland
- gluteal region
- glyphistoma
- Gopherus
- gorzugi
- graeca
- grandis
- granosa
- Graptemys
- grayi
- gregarious
- guadalupensis
- guentheri
- gular scutes
- gular skin fold
- guttata