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Frogs and toads are broadly classified into ... rather less than 300 million years ago, a date in better ... named 2008 as the "Year of the Frog" in order to draw ...
The oldest fossil "proto-frog" Triadobatrachus is known from the Early Triassic of Madagascar (250 million years ago), but molecular clock dating suggests their split from other amphibians may extend further back to the Permian, 265 million years ago. Frogs are widely distributed, ranging from the tropics to subarctic regions, but the greatest ...
A true toad is any member of the family Bufonidae, in the order Anura (frogs and toads). This is the only family of anurans in which all members are known as toads, although some may be called frogs (such as harlequin frogs). The bufonids now comprise more than 35 genera, Bufo being the best known.
Rana (derived from Latin rana, meaning 'frog') is a genus of frogs commonly known as the Holarctic true frogs, pond frogs or brown frogs. Members of this genus are found through much of Eurasia and western North America .
The archaeobatrachians are the most primitive of frogs. These frogs have morphological characteristics which are found mostly in extinct frogs, and are absent in most of the modern frog species. Most of these characteristics are not common between all the families of Archaeobatrachia, or are not absent from all the modern species of frogs.
The southern frogs form the Leptodactylidae, a name that comes from Greek meaning a bird or other animal having slender toes. They are a diverse family of frogs that most likely diverged from other hyloids during the Cretaceous . [ 1 ]
Male frogs carrying tadpoles made an ... Endangered frog dads travel 7,000 miles to 'give birth' ... The frogs are particularly susceptible and monitored populations declined by 90% within a year.
Time to metamorphosis ranges from a few months in the southern part of the range to 3 years in the north, where the colder water slows development. [44] Maximum lifespan in the wild is estimated to be 8 to 10 years, but one frog lived for almost 16 years in captivity. [44]