The Sphaerodactylus parthenopion, known as the Virgin Islands dwarf gecko, is one of the smallest reptiles in the world, measuring just 18mm. This tiny gecko inhabits leaf litter in dry forests and shrublands on the British Virgin Islands. It is primarily terrestrial, uses its small size for camouflage, and is notable for its parthenogenetic reproduction.

Sphaerodactylus parthenopion, commonly known as the Virgin Islands dwarf gecko, is native to the British Virgin Islands, specifically the island of Virgin Gorda. It is considered one of the world's smallest reptiles.

This species is typically found in subtropical dry forest environments characterized by a warm climate with limited rainfall. The habitat includes rocky terrains and is often associated with leaf litter on the forest floor, which provides both shelter and hunting grounds for small invertebrates.

Sphaerodactylus parthenopion occupies a very specific ecological niche as a ground-dwelling insectivore. Its small size allows it to exploit microhabitats under rocks and in leaf litter where it feeds on tiny insects and arachnids. It is well adapted to its dry forest habitat, relying on its cryptic coloration for camouflage against predators.