Definitionadj. capable of being placed opposite to something
Last update: September 18, 2015
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The tail is rudimentary, the first hind-toe opposable, the first pair of upper incisors very large, but the second and third either absent or small and placed partially behind the larger pair; and only five pairs of cheek-teeth in each jaw. [Please select]
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DISCUSSION Noble (1931) considered the species of _Phyllomedusa_ having opposable digits, reduced terminal discs, and no webbing to be advanced and such species as _Agalychnis moreleti_, _calcarifer_, and _spurrelli_ to be primitive. [Please select]
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A more reasonable hypothesis is that the evolution of opposable digits took place in a phyletic line that had as its ancestral stock a frog with generalized hands and feet. [Please select]
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The walking gait already present in phyllomedusines provided a source for further modification, which resulted in the development of opposable digits and the associated lemuroid manner of climbing. [Please select]
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Chela: the terminal portion of a limb bearing a lateral movable claw like that of a crab; specifically applied to the feet in some Parasitica in which the opposable claw forms a clasping structure. [Please select]
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_Phyllomedusa_ is recognized on the basis of a vertical pupil and opposable thumb; _Plectrohyla_ is characterized by the presence of a bony prepollex and the absence of a quadratojugal. [Please select]
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