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Most of the frogs belonging to this group are listed under the least concern section of the IUCN red list. However, there is a significant percentage of these frogs listed as data deficient, endangered, or critically endangered. Like most other amphibians, the frogs listed in this group can be particularly vulnerable to environmental change.
Frogs are used in cloning research and other branches of embryology. Although alternative pregnancy tests have been developed, biologists continue to use Xenopus as a model organism in developmental biology because their embryos are large and easy to manipulate, they are readily obtainable, and can easily be kept in the laboratory. [227]
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 common frog takes its place as an unspecialized and opportunistic feeder wherever it is located. In other words, common frogs will consume whatever prey that is most available and easy to capture. [19] This usually means that the common frog feeds by remaining idle and waiting until a suitable prey enters the frog's domain of capture.
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.
Typically, true frogs are smooth and moist-skinned, with large, powerful legs and extensively webbed feet. The true frogs vary greatly in size, ranging from small—such as the wood frog (Lithobates sylvatica)—to large. Many of the true frogs are aquatic or live close to water. Most species lay their eggs in the water and go through a tadpole ...
The Batrachia / b ə ˈ t r eɪ k i ə / are a clade of amphibians that includes frogs and salamanders, but not caecilians nor the extinct allocaudates. [1] The name Batrachia was first used by French zoologist Pierre André Latreille in 1800 to refer to frogs, but has more recently been defined in a phylogenetic sense as a node-based taxon that includes the last common ancestor of frogs and ...
Brachycephaloidea (Terrarana) is a monophyletic group of frogs that includes the families: Brachycephalidae, Caligophrynidae, Craugastoridae, Eleutherodactylidae, Ceuthomantidae, Neblinaphrynidae and Strabomantidae. [1] The superfamily contains 882 species that inhabit the New World tropics, subtropics, and Andean regions.