Talk:Dactyly

Frog

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)

Dogs

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)

Some corrections

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.]

• Um, so... fix it! — SMcCandlish [talk] *[contrib] ツ 09:40, 14 July 2006 (UTC)

Merge

• This article DESPERATELY needs to be merged into Syndactyly — SMcCandlish [talk] *[contrib] ツ 12:04, 11 July 2006 (UTC)
• Agreed. --Ihope127 19:43, 11 July 2006 (UTC)
• The taxonomy sections should be merged. This page should stay separate as an explanation of the human medical condition, which is of separate interest. —Preceding unsigned comment added by 70.152.53.197 (talk • contribs)
• Except that neither Dactyly nor Syndactyly are about "the human medical condition", in particular. They are almost completely duplicate articles, about dactyly conditions in general, in both animals and humans. I agree with your underlying idea - the Albinism article is discussing a similar split. The human condition does need a Polydactyly (humans) article, as the human interest in medical conditions is of significant separate interest from their general nature in the animal world. However that has nothing at all to do with whether these two articles should be merged. P.S.: Please sign your posts (you do that by adding ~~~~ at the end.  :-)
• — SMcCandlish [talk] [contrib] ツ 13:03, 27 July 2006 (UTC)
• Brachydactyly should be added to this as well Dirtyjerz 21:50, 18 September 2007 (UTC)

Transferred from Talk:Syndactyly

Genes

• 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

• I'm unsure of the answer, however I see no need to remove the gene(s). - Quolnok 16:49, 16 May 2006 (UTC)
• Those with severe cases of hypodactyly and syndactyly might disagree with you on that one. :-/ — SMcCandlish [talk] [contrib] ツ 12:04, 11 July 2006 (UTC)

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)

Merge

• This article DESPERATELY needs to be merged into Dactyly — SMcCandlish [talk] [contrib] ツ 12:04, 11 July 2006 (UTC)
• Copied to Talk:Dactyly, as apparently the templates want us to discuss it over there.

Broken image

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] ツ 12:04, 11 July 2006 (UTC)

Removed

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)

All mammals are descended from the pentadactyl limb

"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).

{land vertebrates} is not a subset of {mammals}, so that wouldn't be an expansion … —Ruakh_TALK 20:25, 6 February 2007 (UTC)

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)

Question

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

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)

Nuthatches

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

Theropoda

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)

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)

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)

References

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)

Copyvio in Syndactyly?

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

Non-defective Polydactyly

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)

Birds: anisodactyly

The relevant section of the article says anisodactyly

"... is common in songbirds and other perching birds, as well as hunting birds such as eagles, hawks, and falcons. This arrangement of digits helps with perching and/or climbing and clinging."

Maybe I'm just missing something, but doesn't it also help with grasping and carrying (prey, or objects)? Maybe many anisodactyl birds don't have that ability? I don't know. TooManyFingers (talk) 17:04, 16 July 2025 (UTC)

Birds: syndactyly

In this article's subsection on syndactyly in birds, it says most of Picocoraciae are syndactyl, but that rollers are an exception.

But in the article Coraciidae, which is the rollers, it says they are syndactyl.

One of the articles must be missing details or have a mistake. TooManyFingers (talk) 17:25, 16 July 2025 (UTC)