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The use of the common names "frog" and "toad" has no taxonomic justification.From a classification perspective, all members of the order Anura are frogs, but only members of the family Bufonidae are considered "true toads".This classification is based on such morphological features as the number of vertebrae, the structure of the pectoral girdle, and the morphology of tadpoles.While this classification is largely accepted, relationships among families of frogs are still debated.Enjoy vicious HD Porn Videos with hot curvy models!A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (Ancient Greek ἀν-, without οὐρά, tail).

Besides living in fresh water and on dry land, the adults of some species are adapted for living underground or in trees.

The neobatrachians seemed to have originated in Africa/India, the salamanders in East Asia and the caecilians in tropical Pangaea.

Other researchers, while agreeing with the main thrust of this study, questioned the choice of calibration points used to synchronise the data.

The characteristics of anuran adults include: 9 or fewer presacral vertebrae, the presence of a urostyle formed of fused vertebrae, no tail, a long and forward-sloping ilium, shorter fore limbs than hind limbs, radius and ulna fused, tibia and fibula fused, elongated ankle bones, absence of a prefrontal bone, presence of a hyoid plate, a lower jaw without teeth (with the exception of Gastrotheca guentheri) consisting of three pairs of bones (angulosplenial, dentary, and mentomeckelian, with the last pair being absent in Pipoidea), Frogs and toads are broadly classified into three suborders: Archaeobatrachia, which includes four families of primitive frogs; Mesobatrachia, which includes five families of more evolutionary intermediate frogs; and Neobatrachia, by far the largest group, which contains the remaining 24 families of modern frogs, including most common species throughout the world.

The Neobatrachia suborder is further divided into the two superfamilies Hyloidea and Ranoidea.

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Frog populations have declined significantly since the 1950s.

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