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An example of interdigital webbing on an Abah River flying frog.. In oryzomyines, a mainly South American rodent group, the marsh rice rat, Pseudoryzomys simplex, and Sigmodontomys alfari all have small webs, which do not extend to the end of the proximal phalanges, whereas Amphinectomys savamis, Lundomys molitor and the members of the genera Holochilus and Nectomys have more expansive webbing ...
A webbed foot has connecting tissue between the toes of the foot. Several distinct conditions can give rise to webbed feet, including interdigital webbing and syndactyly. The webbing can consist of membrane, skin, or other connective tissue and varies widely in different taxa. This modification significantly increases the surface area of the feet.
The fingers are shown to be joined into a paddle, as was inferred from the apparent interdigital webbing seen in the mummy. [9] It was not until 1964 that John H. Ostrom voiced doubts about the webbed-finger hypothesis. Ostrom was able to show that hadrosaurids did not feed on soft aquatic plants as previously assumed, but that their elaborate ...
Detail of tail and hind foot The fingers of both the Senckenberg and the AMNH mummy are partially connected to each other by an envelope of skin impressions. Based on the AMNH mummy, Osborn, in 1912, interpreted these impressions as interdigital webbing , indicating an aquatic lifestyle for hadrosaurids; [ 16 ] this hypothesis was further ...
The presence of interdigital webbing within the fossils of semi-aquatic Eocene cetaceans was probably the result of BMP antagonists counteracting interdigital apoptosis during embryonic limb development. Modifications to signals in these tissues likely contributed to the origin of an early form of hyperphalangy in fully aquatic cetaceans about ...
Webbed toes is the informal and common name for syndactyly affecting the feet—the fusion of two or more digits of the feet. This is normal in many birds, such as ducks; amphibians, such as frogs; and some mammals, such as kangaroos.
The hind feet are partially webbed, but the front feet are not, the least interdigital webbing of all otters. [1] Notably, the skull is quite large, housing a larger brain in relation to its body. [3]
The most common is interdigital erythrasma, which is of the foot, and may present as a scaling, fissuring, and chronic non-resolving break down of the toe web interspaces. [3] The slightly webbed spaces between toes, or other body region skin folds, make it difficult to distinguish from various Tinea. The patient is commonly otherwise asymptomatic.