Continent world ultimately persisted with these being regarded as separate continents. From the late 18th century, some geographers started to regard North America and South America as two parts of the world, making five parts in total. Overall though, the fourfold division prevailed well into the 19th century. Europeans discovered Australia in 1606, but for some time it was taken as part of Asia. By the late 18th century, some geographers considered it a continent in its own right, making it the sixth (or fifth for those still taking America as a single continent). In 1813, Samuel Butler wrote of Australia
Smallest organisms chameleons ("B. minima"), 14–19 millimetres for male Mount d'Ambre leaf chameleons ("B. tuberculata") and 15–16 millimetres for male "B. micra", though females are larger. Of the aforementioned geckos, "S. ariasae" was first described in 2001 by the biologists Blair Hedges and Richard Thomas. This dwarf gecko is endangered and lives in Jaragua National Park in the Dominican Republic and on Beata Island ("Isla Beata"), off the southern coast of Hispaniola in the Dominican Republic. The world's smallest turtle is the speckled padloper tortoise ("Homopus signatus") from South Africa. The males measure , while females measure up to almost . The