កង្កែប

ដោយវិគីភីឌា
កង្កែប
របាយកាល: Early Triassic-Holocene, 250–0Ma
Australia green tree frog (Litoria caerulea) crop.jpg
Australian green tree frog (Litoria caerulea)
ចំណាត់ថ្នាក់វិទ្យាសាស្ត្រ e
Unrecognized taxon (fix): Salientia
Order: Anura
Duméril, 1806 (as Anoures)
Suborders

Archaeobatrachia
Mesobatrachia
Neobatrachia
 –
List of Anuran families

Native distribution of frogs (in green)

កង្កែប are a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (Ancient Greek an-, without + oura, tail). The oldest fossil "proto-frog" appeared in the early Triassic of Madagascar, but molecular clock dating suggests their origins 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 concentration of species diversity is found in tropical rainforests. There are approximately 4,800 recorded species, accounting for over 85% of extant amphibian species. They are also one of the five most diverse vertebrate orders.