True frogs is the common name for the frog family Ranidae. They have the widest distribution of any frog family. They are abundant throughout most of the world, occurring on all continents except Antarctica. The true frogs are present in North America, northern South America, Europe, Africa, and Asia. The Asian range extends across the East Indies to New Guinea and a single species, the Australian wood frog, has spread into the far north of Australia.
The edible frog is a species of common European frog, also known as the common water frog or green frog.
The marsh frog is a species of water frog native to Europe and parts of western Asia.
Rana 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. Many other genera were formerly included here. These true frogs are usually largish species characterized by their slim waists and wrinkled skin; many have thin ridges running along their backs, but they generally lack "warts" as in typical toads. They are excellent jumpers due to their long, slender legs. The typical webbing found on their hind feet allows for easy movement through water. Coloration is mostly greens and browns above, with darker and yellowish spots.
The pool frog is a European frog in the family Ranidae. Its specific name was chosen by the Italian herpetologist Lorenzo Camerano in 1882, in order to honour his master Michele Lessona.
Amolops daorum is a species of frog in the family Ranidae. It is known from its type locality in the vicinity of Sa Pa in northern Vietnam near the Chinese border, Hong Kong, and Houaphanh Province in eastern Laos; presumably it also occurs the intervening areas. The Hong Kong record is considered suspicious, however.
Graf's hybrid frog is a hybridogenic species in the true frog family Ranidae. It is found in France and Spain.
The Italian edible frog is a hybridogenic species in the true frog family Ranidae. These frogs are the offspring of P. bergeri and either P. ridibundus or the edible frog which is itself of hybrid origin.
Humerana lateralis is a species of frog in the family Ranidae. It is found in Cambodia, Laos, Myanmar, Thailand, and Vietnam. It is commonly known as Kokarit frog, yellow frog or (ambiguously) wood frog.
Pelophylax pueyoi is an extinct species of large frog from Late Miocene of Spain. Initially classified as a member of the "green frog" complex within the genus Rana, it has since been reclassified into the genus Pelophylax as that genus has been split from Rana.
Dactylosoma is a genus of parasitic alveolates of the phylum Apicomplexa.
Hyaloklossia is a genus of parasitic alveolates in the phylum Apicomplexa. Only two species in this genus are currently recognised.
Parthenogenesis is a form of reproduction where eggs develop without fertilization, resulting in unisexual species. This phenomenon is closely related with reproductive modes such as hybridogenesis, where fertilization occurs, but the paternal DNA is not passed on. Among amphibians, it is seen in numerous frog and salamander species, but has not been recorded in caecilians.
The fertile hybrids of European water frogs reproduce by hybridogenesis (hemiclonally). This means that during gametogenesis, they discard the genome of one of the parental species and produce gametes of the other parental species. The first parental genome is restored by fertilization of these gametes with gametes from the first species. In all-hybrid populations of the edible frog Pelophylax kl. esculentus, however, triploid hybrids provide this missing genome.
Leszek Berger was a Polish herpetologist and malacologist.
Thaumastosaurus is an extinct genus of frogs in the family Pyxicephalidae. Five species are known, all from the Eocene of western Europe, including France, England, and Switzerland. Specimens of the species T. gezei from the Quercy Phosphorites of France are known for their exceptional preservation, providing three-dimensional images of the animal's life appearance.
