Talk:Arthropod leg

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Table of possible arthropod leg homologies

Hypothetical ancestor	Ancestral hexapod	Insects	Spiders	Crustaceans	Millipede	Limulus	Scorpions	Collembola
?	epicoxa	?	?	?	?	?	?	epicoxa
precoxa	subcoxa	?	?	precoxa	?	?	?	subcoxa
coxa	coxa	coxa	coxa	coxa	coxa	coxa	coxa	coxa
trochanter	trochanter	trochanter	trochanter	basis	trochanter	trochanter	trochanter	trochanter
prefemur	prefemur	-	-	ischium	prefemur	-	-	-
femur	femur	femur	femur	merus	femur	femur	femur	femur
patella	patella	-	patella	-	-	patella	patella	-
tibia	tibia	tibia	tibia	carpus	tibia	tibia	tibia	tibia
?	basitarsus	-	metatarsus	-	-	-	basitarsus =metatarsus	foot-complex
tarsus	eutarsus	tarsus	tarsus	propodus	tarsus	tarsus	telotarsus =tarsus
pretarsus	post-tarsus	?	?	dactylus	claw	-	pretarsus

Sources

hypothetical arthropod ancestor
millipede
spider
Limulus
Scorpions
Collembola
terminology: basitarsus, telotarsus = metatarsus, tarsus
ancestral hexapod

Discussion

Queries

Are these homologies correct?
Is the precoxa present in other groups?
Must the ancestor have had an additional metatarsus?
Are the insect tarsomeres homologous with whole leg segments (e.g crustacean dactylus)?

Further mergers

I realised today that we've got separate articles for biramous and uniramous. Sihce these terms are only meaningful in discussions of arthropod legs, I suggest that their material be brought here as an extra section. I don't know of any good pictures showing a biramous leg, but one would be useful. --Stemonitis 14:06, 13 August 2006 (UTC)[reply]

Oppose merger of articles re: segments of insect leg

I opposed these mergers on the respective articles talk pages. I have reverted them all. Squamate 14:29, 14 August 2006 (UTC)[reply]

To answer your concerns, a merger need not result in a loss of references - these could easily be brought over to arthropod leg. Nor would there necessarily be any dilution of information, since insects have their own section in that article. The separate articles are stubs and are unlikely to grow into anything much longer. They would however, fit perfectly into the arthropod leg article. I can see little reason for preserving their separateness. --Stemonitis 07:32, 15 August 2006 (UTC)[reply]

I agree, they would fit very nicely in this article. IronC hris | (talk) 14:15, 15 August 2006 (UTC)[reply]

Loss of leg statistics

Mention the average number of legs left for various arthropods by the time of their death. For spiders it seems oh, 7.2, down from 8.0 at birth, (which also mention (8).)

Also mention that it seems like no big deal for spiders to lose a leg or two.

Jidanni 01:07, 10 July 2007 (UTC)[reply]

Biramous: humans?

Mention if humans are biramous or uniramous or neither or both. Jidanni 13:28, 15 July 2007 (UTC)[reply]

Humans aren't arthropods so it isn't relevant here. Equinox (talk) 17:15, 27 August 2015 (UTC)[reply]

What's a "thoracopod"?

Redirects here but not mentioned in article. Equinox (talk) 17:14, 27 August 2015 (UTC)[reply]

Sonic

the gayist hedgehog ever 80.42.251.186 (talk) 11:24, 7 September 2023 (UTC)[reply]

Inconsistency with modern cladistics in phrasing

A lot (but not all) of this article treats insects as a separate category from crustaceans, including saying that the crustacean naming differs from "other", and so on. But insects are crustaceans. It feels like some editors of this article don't know that. 2601:1C2:5000:E7:3599:CC36:A009:E942 (talk) 01:40, 12 July 2024 (UTC)[reply]

Phylogenetically, yes, insects belong in Pancrustacea, but the reality is that there are different systems for naming the parts of the legs of groups of arthropods that were traditionally treated separately. Peter coxhead (talk) 09:28, 13 July 2024 (UTC)[reply]