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Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods excluding the amniotes (tetrapods with an amniotic membrane , such as modern reptiles , birds and mammals ).
Anura is an order of animals in the class Amphibia that includes frogs and toads. More than 5,000 species are described in the order. The living anurans are typically divided into three suborders: Archaeobatrachia, Mesobatrachia, and Neobatrachia. This classification is based on such morphological features as the number of vertebrae, the ...
Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia . They inhabit a wide variety of habitats , with most species living within terrestrial , fossorial , arboreal or freshwater aquatic ecosystems .
Traditionally considered a subclass of the class Amphibia, modern classification systems recognize that labyrinthodonts are not a formal natural group exclusive of other tetrapods. Instead, they consistute an evolutionary grade (a paraphyletic group ), ancestral to living tetrapods such as lissamphibians (modern amphibians) and amniotes ...
The origins and evolutionary relationships between the three main groups of amphibians (apodans, urodeles and anurans) is a matter of debate.A 2005 molecular phylogeny, based on rDNA analysis, suggested that the first divergence between these three groups took place soon after they had branched from the lobe-finned fish in the Devonian (around 360 million years ago), and before the breakup of ...
Search. Search. Appearance. Donate; ... View history; Tools. Tools. ... List of amphibian genera lists the vertebrate class of amphibians by genus, ...
As of December 2019, the Amphibian Species of the World classifies the following genera in the family Leptodactylidae: [4] Subfamily Leiuperinae Bonaparte, 1850 (90 species) Edalorhina Jiménez de la Espada, 1870; Engystomops Jiménez de la Espada, 1872; Physalaemus Fitzinger, 1826; Pleurodema Tschudi, 1838; Pseudopaludicola Miranda-Ribeiro, 1926
Archaeobatrachia (Neo-Latin archaeo-("old") + batrachia ("frog")) is a suborder of the order Anura containing various primitive frogs and toads.As the name suggests, these are the most primitive frogs.