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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 ...
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 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 ...
This frog lives in fast-flowing streams and internal fertilisation prevents the sperm from being washed away before fertilisation occurs. [90] The sperm may be retained in storage tubes attached to the oviduct until the following spring. [91] Most frogs can be classified as either prolonged or explosive breeders.
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.
The Amphibian Specialist Group's list of "lost frogs" (frogs not seen for decades) includes 10 Raorchestes species. [16] Since several species of the genus have been described in the last 15 years conservation data is relatively poor as are detailed life-history studies.
Pages in category "Frogs" The following 26 pages are in this category, out of 26 total. This list may not reflect recent changes. ...
Hyloidea is a superfamily of frogs. [1] Hyloidea accounts for 54% of all living anuran species. [2] The superfamily Hyloidea branched off from its closest relative, the Australobatrachia, during the mid-Cretaceous. [3]