Rana is a genus of frogs. Species include such archetypal pond frogs as the Common Frog of Europe, brown frogs, and the New World true frogs including the leopard frog. Members of this genus are found through much of Eurasia, North America, Central America, and the northern half of South America. Many other genera were formerly included here; see below for details.
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" like 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.
Many frogs in this genus breed in early spring, although subtropical and tropical species may breed throughout the year. Males of most of the species are known to call, but a few species are thought to be voiceless. Females lay eggs in rafts or large globular clusters and can produce up to 20,000 at one time.
Genera recently split from Rana are Babina, Clinotarsus (including Nasirana), Glandirana, Hydrophylax, Hylarana, Odorrana (including Wurana), Pelophylax, Pulchrana, Sanguirana and Sylvirana. Of these, Odorrana is so closely related to Rana proper that it could conceivably be included here once again. The others seem to be far more distant relatives, in particular Pelophylax.
New species are still being described in some numbers.
The Harpist Brown Frog, Kampira Falls Frog or Yaeyama Harpist Frog was formerly known as R. psaltes; it was subsequently identified as the long-known R. okinavana. That name has been misapplied to the Ryūkyū Brown Frog but the Harpist Brown Frog is a rather distinct species that apparently belongs in Babina or Nidirana if these are considered valid.
Developmental windows and origins of the chemical cues mediating hatching responses to injured conspecific eggs in the common frog (Rana temporaria).(Report)
Jun 01, 2008; Abstract: In amphibians, embryonic exposure to chemical cues resulting from a predation event on conspecific eggs can influence...
Morphological Abnormalities in Amphibians in Agricultural Habitats: A Case Study of the Common Frog Rana temporaria
Dec 20, 2006; Recent studies suggest that the incidence of morphological abnormalities has increased in many amphibian populations, often...
Disentangling genetic vs. environmental causes of sex determination in the common frog, Rana temporaria.(Research article)
Jan 08, 2008; Authors: Chikako Matsuba (corresponding author) ; Ikuo Miura ; Juha Merilä BackgroundMost vertebrates exhibit genotypic...