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Goliath frog eggs and tadpoles are about the same size as other frogs despite their very large adult form. [citation needed] A lateral fold extends from the eye to the posterior portion of the tympanum. Their toes are fully webbed, with large interdigital membranes extending down to the toe tips. The second toe is the longest.
Ground-dwelling frogs generally lack the adaptations of aquatic and arboreal frogs. Most have smaller toe pads, if any, and little webbing. Some burrowing frogs such as Couch's spadefoot (Scaphiopus couchii) have a flap-like toe extension on the hind feet, a keratinised tubercle often referred to as a spade, that helps them to burrow. [58]
This is the stage where frogs have all four limbs and are able to walk on land, but still have their tails. They are not quite juvenile frogs. Metamorphs are roughly 2.6 cm long, but they are nearly as agile as the adult and juvenile when they emerge from the ponds. They are often mistaken for the closely related leopard frog.
Though many tadpoles will feed on dead animals if available to them, only a few species of frog have strictly carnivorous tadpoles, an example being the frogs of the family Ceratophryidae, their cannibalistic tadpoles having wide gaping mouths with which they devour other organisms, including other tadpoles.
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.
The term "discoglossid" has also been used to refer to many primitive fossil frogs that share plesiomorphic (ancestral) similities to alytids, but that are probably not closely related. [ 6 ] Genera and species
Theloderma corticale (common names: mossy frog, [3] Vietnamese mossy frog, [4] Tonkin bug-eyed frog, moss bug-eyed frog, [2] and [for the formerly recognized Theloderma kwangsiense] Kwangsi warty treefrog) is a species of frog in the family Rhacophoridae.The theloderma corticale is often difficult to identify visually as there are cryptic species that look very similar to it.
Females are usually 30–36 mm, while males most often range from 24 to 32 mm, [5] although the smallest calling males can be as small as 20 mm. [6] Although the difference in size between males and females is not significant enough to constitute dimorphism, there is an unusually large variation in size of males in this species, which may be attributed to pressures of sexual selection. [10]