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''Ecnomiohyla rabborum'', commonly known as Rabbs' fringe-limbed treefrog, is a species of frogs in the family Hylidae. They are relatively large frogs inhabiting the forest canopies of central Panama. Like other members of the genus ''Ecnomiohyla'', they are capable of gliding by spreading their enormous and fully webbed hands and feet during descent. The males of the species are highly territorial, guarding water-filled tree holes used for breeding. They are also the ones responsible for guarding and caring for the young, including providing food. They are the only known species of frog where the tadpoles derive nutrition by feeding on the skin cells of their fathers. The species was originally discovered in 2005 and formally described in 2008 by a team of herpetologists led by Joseph R. Mendelson III. It is named in honor of the conservationists and herpetologists George B. Rabb and Mary S. Rabb. It is officially listed as Critically Endangered by the International Union for Conservation of Nature and Natural Resources (IUCN) as of 2009. It is believed that the species may be extinct in the wild due to the epidemic of ''Batrachochytrium dendrobatidis'' in its native range. Despite the efforts of several conservation teams, captive breeding programs have all failed. The last known female of the species died in 2009. It was survived by two other individuals, both males. On February 17, 2012, one of the two was euthanized at Zoo Atlanta in Georgia due to failing health. The last known surviving member of the species, an adult male, currently resides at the Atlanta Botanical Garden. ==Description== ''Ecnomiohyla rabborum'' is a relatively large frog. The snout-vent length (SVL) of males average between , while in females it is between . The head is wider than the body and flattened at the top. The snout is moderately long with nostrils protruding from the sides near the tip. Viewed from the top, the snout is more or less elliptical in shape. The canthal ridge is concave (curves outward) and has thick and rounded edges. The loreal regions are similarly concave. The tympana are smaller in diameter than the eyes and slightly inclined. Smooth glandular structures (known as the supratympanic fold) extend over the tympana from the eyes to the edges of the lower jaw. The tongue is round and it possesses narrowly spaced ovoid groups of pre-vomerine teeth.〔 The arms are short and stout with very large hands. There are no skin folds on the wrists, though a scalloped fringe of skin is present from the elbows to just below the discs on the fourth fingers. The fingers are all relatively short with large flattened discs on the tips. The discs on the second, third, and fourth fingers are about the same diameter as the tympana. Small protrusions known as tubercles are present on the underside of the hands. On the first finger, the tubercles on the tipmost joints are elliptical in shape. On the second and third fingers, the tubercles below the finger joints (subarticular tubercles) are smaller than that on the fourth fingers. There are no tubercles on the palms of the hands though elongated flat tubercles are present behind the bases of the inner fingers (the "thumbs"). Numerous small and round tubercles are also present in between the joints of the fingers. The fingers are more or less fully webbed.〔〔 The hind limbs are slender and of moderate length. Like the hands, the feet are very large. When resting, the heels of the legs barely overlap each other. If stretched forward up the length of the body, the tibiotarsal articulation (the "ankle") reaches beyond the eyes. Like the arms, a fringe of scalloped skin also extends from the heel to the base of the foot on each leg, continuing as a low ridge to the base of the disc of the fifth toe. The toes, like the fingers, possess flattened discs at the tips, though they are slightly smaller in diameter. The tubercles on the tipmost joints of the fifth toes are larger than all of the other subarticular tubercles on the toes. Interspersed between them are numerous small and conical tubercles. The toes are also fully webbed.〔〔 The skin of ''E. rabborum'' is granular in texture and predominantly a mottled brown. The upper surfaces of the limbs are also mottled brown while the rear surfaces of the thighs are a pale yellow. The chin and upper chest are distinctively brown, though the rest of the underside of the body is mostly white speckled with irregular brown spots. The eyelids and upper surfaces of the limbs and back are studded with green flecks, the appearance and positions of which can be changed by the animal voluntarily (metachrosis). The irises of the eyes are uniformly reddish-brown.〔〔 During the breeding season, adult males of the species are characterized by greatly enlarged upper arms (humerus) with a bony ridge covered by skin and black keratinized spines. Spines are also present on the upper surface of the area just before the thumbs. These spines are likely used during amplexus.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ecnomiohyla rabborum」の詳細全文を読む スポンサード リンク
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