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Warty frog species tend to be called toads, but the distinction between frogs and toads is informal, not from taxonomy or evolutionary history. An adult frog has a stout body, protruding eyes , anteriorly-attached tongue , limbs folded underneath, and no tail (the tail of tailed frogs is an extension of the male cloaca).
The common frog is a very widely distributed species, being common all throughout Europe and northwest Asia. The more peripheral subpopulations of common frogs are significantly less in number, as well as less genetically variable.
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 .
Family Ranidae – True frog, including Ceratobatrachidae, Dicroglossidae, Micrixalidae, Nyctibatrachidae, Petropedetidae, Phrynobatrachidae, Ptychadenidae, Pyxicephalidae Genus Afrana Genus Allopaa - see Family Dicroglossidae
The hairy frog (Trichobatrachus robustus) also known as the horror frog or Wolverine frog, is a Central African species of frog in the family Arthroleptidae.It is typically considered monotypic within the genus Trichobatrachus, but based on its genetics, it should be included in Astylosternus instead.
The species is very similar in appearance to another in the area – B hermogenesi – which also has the same yellowish-brown skin, lives in leaf litter, and emerges as tiny frogs from their eggs ...
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.
Analysis of the American bullfrog's realized niche at various sites in Mexico, and comparisons with the niches of endemic frogs show that it is possible that the American bullfrog capable of niche shift, and pose a threat to many endemic Mexican frog species, even those that are not currently in competition with the American bullfrog. [60]