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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 structure of the pectoral girdle, and the morphology of tadpoles.
Some species of anurans hybridise readily. For instance, the edible frog (Pelophylax esculentus) is a hybrid between the pool frog (P. lessonae) and the marsh frog (P. ridibundus). [22] The fire-bellied toads Bombina bombina and B. variegata are similar in forming hybrids.
This suborder is the most advanced and apomorphic of the three anuran suborders alive today, hence its name, which literally means "new frogs" (from the hellenic words neo, meaning "new" and batrachia, meaning "frogs"). It is also by far the largest of the three; its more than 5,000 different species make up over 96% of all living anurans.
Anurans all share a number of morphological characteristics, so researchers have had to use DNA testing to understand their relationships. ML and Bayesian analyses using a nuclear marker toolkit have resolved some of the relations of the anurans in Hyloidea. 53 out of the 55 previously established nodes on the phylogenetic tree were supported by this DNA testing. [2]
P. ocularis is the smallest frog in North America, only reaching a maximum head-body length of 19 mm (0.75 in).It is normally pale brown, but can have a green or pink tinge.
Male Rana temporaria calling in a garden pond in Jambes, Belgium. The common frog or grass frog (Rana temporaria), also known as the European common frog, European common brown frog, European grass frog, European Holarctic true frog, European pond frog or European brown frog, is a semi-aquatic amphibian of the family Ranidae, found throughout much of Europe as far north as Scandinavia and as ...
The Salientia (Latin salire, salio meaning "to jump") are a total group of amphibians that includes the order Anura, the frogs and toads, and various extinct proto-frogs that are more closely related to the frogs than they are to the Urodela, the salamanders and newts. [1]
Like other anurans, Fletcher's frog is vulnerable to Batrachochytrium dendrobatidis (Bd), a fungal pathogen that infects the skin and disrupts osmoregulation. Susceptibility to Bd varies by species, but Fletcher's frog suffers from a particularly high mortality rate when infected with the disease.