Talk:Dactyly

Latest comment: 2 years ago by 2404:440C:27D5:B300:F8DD:B79A:2DCB:D73D in topic Frog

Frog

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Hi, maybe somebody wants to specify that the "frog" mentioned in the bit on horses having one toe is about the part of the horse's foot and not the animal the frog because it's semi confusing — Preceding unsigned comment added by 2404:440C:27D5:B300:F8DD:B79A:2DCB:D73D (talk) 20:47, 14 May 2022 (UTC)Reply

Dogs

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Dogs and cats are listed under tetra-dactyly, but the majority *do* have 5 toes- one of them is just several inches up their legs. does that really count? (user- Cantras) 129.186.37.193 01:31, 27 November 2006 (UTC)Reply

Some corrections

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Chameleons ought to be noted under zygodactyly, and the Hoatzin (sic) should not, or else its article is incorrect.
Also the definition for sydactyly is incorrect. What is given is a definition for anisodactyly.
-- [anon.]

Merge

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Transferred from Talk:Syndactyly

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Genes

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  • Dear Sir or Madam:
Has yet the gene(s) or DNA area been identfied in which the Sundactyly factor resides? What is it, what is its nominclature? Can it be excised without damage to other aspects of the human strains?:*
Tom Faught
E-mail: tfffmg@aol.com
Is it even established that there is such a thing as "the syndactyly factor"? Developmental anomalies often are caused by non-genetic influences, or by combinations of individually harmless allels. Now, assuming there indeed exists such a factor (or factors), excising it may or may not have harmful side-effects, but it certainly wouldn't cure the syndactyly. However, victims might want to use genetic screening to make sure their offspring does not inherit the factor. Orcoteuthis (talk) 16:49, 25 May 2008 (UTC)Reply

Merge

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Broken image

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The image is corrupt, at both small and medium size. The very large original is OK (though mispelled in filename) The big one should be downloaded, reuploaded to generate new sm. & m. sizes and replace the broken one in the article. — SMcCandlish [talk] [contrib] 12:04, 11 July 2006 (UTC)Reply

Removed

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I have removed the following, "It is unethical to perform such surgery on infants or children." This is an opinion not a fact.

Morgan Leigh 01:27, 27 November 2006 (UTC)Reply

All mammals are descended from the pentadactyl limb

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"All land vertebrates are descended from an ancestor with a pentadactyl limb" Whales and dolphins are not land vertebrates, but they are descended from an ancestor with a pentadactyl limb. It should be expanded to include not just land vertebrates, but all mammals. —The preceding unsigned comment was added by 86.138.96.121 (talk) 20:07, 6 February 2007 (UTC).Reply

{land vertebrates} is not a subset of {mammals}, so that wouldn't be an expansion … —RuakhTALK 20:25, 6 February 2007 (UTC)Reply
It should say "living tetrapods" or the like. "Land vertebrates" is an ambiguous term that may or may not include whales, ichthyosaurs, etc. It may also include things like Tulerpeton, which isn't descended from pentadacyls. Orcoteuthis (talk) 18:52, 12 February 2008 (UTC)Reply

Question

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Does anybody know about the condition of having a thumb with an extra knuckle? Aelffin 16:06, 23 April 2007 (UTC)Reply

That would be a type of polyphalangy, also known as hyperphalangy, which is the generalized condition of having supernumerary phalanges (finger bones). Much like polydactyly, this can be a medical disorder (eg. in humans), or the normal state in certain derived tetrapods that have increased the number of phalanges during their evolution (eg. ichthyosaurs, who exhibit both polydactyly and polyphalangy). Currently, WP lacks an article about polyphalangy and I'm too lazy to write one ... Orcoteuthis (talk) 16:59, 25 May 2008 (UTC)Reply

Nuthatches

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I took out the mention of nuthatches under zygodactyly, since this says they're anisodactyl. —JerryFriedman (Talk) 21:55, 19 December 2007 (UTC)Reply

Theropoda

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The section on tridactyl feet mentions that many theropods, such as Tyrannosaurus, are tridactyls. That is incorrect, if we count the fourth dewclaw. Funkynusayri (talk) 11:01, 14 March 2008 (UTC)Reply

I guess technically Tyrannosaurus has didactylous manus and tetradactylous pes, making it tridactylous on average ... But pragmatically speaking neotheropods are commonly refered to as tridactylous, only the weight-bearing digits counting, so I think the mention can stand. Orcoteuthis (talk) 17:17, 25 May 2008 (UTC)Reply

Great article, but shouldn't the types of syndactyly be defined? Just numbering them isn't of much use. Wolf ODonnell (talk) 20:37, 26 March 2008 (UTC)Reply

References

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I updated the references in the genes section as one of them had a missing link and 3 out of 5 types had no references at all (2 still don't). Also, for type II syndactyly both 2q31 and 32 were mentioned as loci. The only source I coiuld find only mentions 2q31. I removed the 2q32 from the page, if someone can find a source that states both 2q31 and 32 as related to syndactyly, please change it back. —Preceding unsigned comment added by 86.80.155.239 (talk) 00:41, 6 June 2008 (UTC)Reply

Copyvio in Syndactyly?

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I have just removed a large part of Syndactyly which looked pretty much as if it were lifted off [1]. Goochelaar (talk) 15:57, 23 June 2008 (UTC)Reply

Non-defective Polydactyly

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I'm a bit confused by the labelling of polydactyly as a defect, as there are some animals for which this is normal: eg the Mole (animal) (5+1), the giant panda (5+1), red panda (5+1), Otton frog (4+1), Holst's frog (4+1) - in all of these it's a prepollex (pseudothumb), eg the bone may be an extension of the radius. Possibly the adapted prepollex/prehallux needs a different section to mention this related phenomenon? (I don't know the subject; got here from googling after reading this http://www.bbc.co.uk/news/science-environment-14108202, which might be worth citing)