ranid การใช้

• The Ranids in New Guinea are only represented with one genus, " Rana ".
• There are currently only two species in this genus, including the type species Ranid herpesvirus 1.
• Ranids tend to produce globular clusters containing large numbers of eggs whereas bufonids produce long, cylindrical strings.
• Although the origins of Microhylidae in New Guinea are very similar to the Ranids, there is much more diversity.
• However, most of the ecological niches filled by frogs had been filled before the ranids and microhylids reached Australia, so only a limited number of species have established.
• New Guinea and Australia have been absent of Ranids for most of their history, however since the continent's collision with Asia, species have begun to move across.
• Most true, or ranid, frogs have slim, streamlined bodies, pointed heads, long hind legs ending in webbed feet and smooth, moist, brown or green skins.
• The ranid tongue is attached to the floor of the mouth near the tip of the jaw, and when the mouth is closed, the tongue lies flat, extended posteriorly from its point of attachment.
• The feeding pattern of the wood frog, basically similar to that of other ranids, is triggered by prey movement and consists of a bodily lunge that terminates with the mouth opening and an extension of the tongue onto the prey.
• The wood frog has garnered attention by biologists over the last century because of its freeze tolerance, relatively great degree of terrestrialism ( for a ranid ), interesting habitat associations ( peat bogs, vernal pools, uplands ), and relatively long-range movements.
• The name was previously used by Frost " et al . " as a separate genus of ranid frogs that included most of the North American frogs traditionally included in the genus " Rana ", including the American bullfrog and northern leopard frog.
• Two further species are introduced : the ranid frog " Hoplobatrachus tigrinus " and the endemic, with the exception of " Ptychadena mascareniensis " . 85 species are threatened with extinction, nine of which are considered by the IUCN as critically endangered.