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Polydactyly also occurs in modern extant reptiles [82] and amphibians. [83] Polydactyly was a non-pathological, reacquired condition in extinct marine reptiles such as ichthyosaurs and hupehsuchians, some of which containing upwards of ten digits within their flippers. [84]
One of the polydactyl cats at the Ernest Hemingway House in Key West, Florida.This particular cat has seven (two extra) toes on each paw. A polydactyl cat is a cat with a congenital physical anomaly called polydactyly (also known as polydactylism or hyperdactyly), which causes the cat to be born with more than the usual number of toes on one or more of its paws.
Polydactyly is very common among domestic cats. For more information, see polydactyly . Polydactyly in early tetrapod aquatic animals , such as in Acanthostega gunnari (Jarvik 1952), one of an increasing number of genera of stem-tetrapods known from the Upper Devonian , which are providing insights into the appearance of tetrapods and the ...
Inheritance of abnormal genes, e.g. polydactyly, ectrodactyly or brachydactyly, symptoms of deformed limbs then often occur in combination with other symptoms ; external causes during pregnancy (thus not inherited), e.g. via amniotic band syndrome; teratogenic drugs (e.g. thalidomide, which causes phocomelia) or environmental chemicals
Ectrodactyly-polydactyly syndrome is a very rare congenital limb malformation syndrome of genetic origin which is characterized a combination of ectrodactyly and polydactyly [1] consisting of underdeveloped/absent central rays of the hands or feet alongside postaxial polydactyly in the same limb that can range from a hypoplastic, bone-devoid extra digit to a fully developed supernumerary digit ...
The term, however, has been found offensive by some because of the reference to the polydactyly, which is seen as a 'freakish' label. [citation needed] For this reason, six-fingered dwarfism has been removed as an alternative name for this entry. This leaves Ellis–Van Creveld syndrome with its initialism, EVC, as the only satisfactory ...
They come in all shapes and sizes. Some walk, some slither, some fly and some swim. Humans are blessed to share the planet with just over 2.1 million recognized species of animals.And scientists ...
Young–Madders syndrome, alternatively known as Pseudotrisomy 13 syndrome or holoprosencephaly–polydactyly syndrome, is a genetic disorder resulting from defective and duplicated chromosomes which result in holoprosencephaly, polydactyly, facial malformations and intellectual disability, with a significant variance in the severity of symptoms being seen across known cases. [1]