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The skeleton has primitive features, but has mostly lost the salamander-like traits of its ancestors. It has a skeleton designed to absorb the force of jumping with its hind legs and tail. It also has long hip bones, long hind leg bones, and long ankle bones, all similar to modern frogs, and is as of 2009 the earliest true frog. [1]
The hairy frog is also notable in possessing retractable "claws", which it may project through the skin, apparently by intentionally breaking the bones of the toe. [5] These are not true claws, as they are made of bone, not keratin. In addition, there is a small bony nodule nestled in the tissue just beyond the frog's fingertip.
A frog is an amphibian characterized by long hind legs, a short body, webbed digits, protruding eyes and the absence of a tail. Frogs are most noticeable through their call, which can be widely heard during the mating season .
Anatomy of a wood frog tadpole (Lithobates sylvaticus) As a frog tadpole matures it gradually develops its limbs, with the back legs growing first and the front legs second. The tail is absorbed into the body using apoptosis. Lungs develop around the time as the legs start growing, and tadpoles at this stage will often swim to the surface and ...
Romer's tree frog (Liuixalus romeri) [2] is a species of frog native to Hong Kong and a small portion of Guangxi, China. [3] With an average snout-vent length of 1.5 – 2.5 cm, it is the smallest amphibian recorded in the territory. Despite its common name, it belongs to the family Rhacophoridae, instead of the Hylidae. It is named for John ...
Experiment De viribus electricitatis in motu musculari Late 1780s diagram of Galvani's experiment on frog legs. Luigi Galvani was born to Domenico Galvani and Barbara Caterina Foschi, in Bologna, then part of the Papal States. [6] The house in which he was born may still be seen on Via Marconi, 25, in the center of Bologna. [7]
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