Sphaerodactylus ariasae is one of the world's two smallest known reptiles. The other is S. parthenopion, native to the British Virgin Islands. The Jaragua sphaero measures 16–18 mm (0.63–0.71 in) from the snout to the base of the tail and can fit on a US 25-cent coin.
S. ariasae was first described by Blair Hedges, a Pennsylvania State University evolutionary biologist, and Richard Thomas, a University of Puerto Rico biologist, in the December 2001 issue of the Caribbean Journal of Science.
The Jaragua sphaero's binomial name was chosen in honor of herpetologist Yvonne Arias, the leader of the Dominican conservation organization Grupo Jaragua, which was instrumental in securing the environmental protection of Jaragua National Park.
- Hedges, S. Blair; Thomas, Richard (2001). "At the Lower Size Limit in Amniote Vertebrates: A New Diminutive Lizard from the West Indies" (PDF). Caribbean Journal of Science. 37 (3–4): 168–173. (Sphaerodactylus ariasae, new species).
- "Tiny gecko is 'world's smallest'". BBC. 3 December 2001. Sci/tech News. Retrieved 2009-02-08.
- Sphaerodactylus ariasae at the Reptarium.cz Reptile Database. Accessed 2015-02-21.
- "World's Smallest Reptile Discovered in Caribbean". Conservation.org (Press release). Conservation International. 3 December 2001. Retrieved 2015-02-21.
- Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Sphaerodactylus ariasae, p. 11).
- Data related to Sphaerodactylus ariasae at Wikispecies
- National Geographic: Smallest Known Lizard Found in Caribbean