Episode 163 - Claws

The Common Descent Podcast

Common Descent

Science, Education, Earth Sciences, Natural Sciences, Science:natural Sciences

4.8 • 764 Ratings

🗓️ 16 April 2023

⏱️ 115 minutes

🔗️ Recording | iTunes | RSS

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Summary

Check the fingers and toes of your favorite vertebrate animals and you’re likely to find claws or something similar at the ends. These digit-caps come in a variety of shapes – claws, nails, even hooves – for a variety of functions. In this episode, we discuss the close relationship between claw form and function, how we study claws in the fossil record, and the intriguing questions of how claws came to be as we know them today. In the news: swimming temnospondyls, ants and plants, Troodon eggs, and cooked snails. Time markers:Intro & Announcements: 00:00:00News: 00:05:30Main discussion, Part 1: 00:38:15Main discussion, Part 2: 01:17:45Patron question: 01:45:45 Listen to us on I Know Dino! https://iknowdino.com/sinotyrannus-episode-437/ Will was a guest on Sprites of Life!https://open.spotify.com/episode/7KmiNQcKWgpT6Nn0FRrMMp Check out our blog for bonus info and pictures:http://commondescentpodcast.com/ Join us on Patreon to support the podcast and enjoy bonus content! https://www.patreon.com/commondescentpodcast Follow this link for a 30-day free trial to Audible!www.audibletrial.com/CommonDescent Or make a one-time donation via PayPal: https://tinyurl.com/4c68u4hp Find merch at the Common Descent Store! http://zazzle.com/common_descent Join the Common Descent Discord server! https://discord.gg/CwPBxdh9Ev Follow and Support us on:Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcastInstagram: @commondescentpodcastYouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduwPodBean: https://commondescentpodcast.podbean.com/iTunes: https://itunes.apple.com/us/podcast/the-common-descent-podcast/id1207586509?mt=2 You can email us at commondescentpodcast(at)gmail.comOr send us physical mail at:The Common Descent Podcast1735 W State of Franklin Rd. Ste 5 #165Johnson City, TN 37604 The Intro and Outro music is “On the Origin of Species” by Protodome.More music like this at http://ocremix.org. Musical Interludes are "Professor Umlaut" by Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0http://creativecommons.org/licenses/by/3.0/

Transcript

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0:00.0	You're listening to the Common Descent Podcast.
0:19.3	Hello, David.
0:20.4	Hello, Will.
0:21.5	And hello listeners.
0:23.4	Welcome to episode 163 of the Common Descent podcast.
0:28.3	We today are talking about claws.
0:31.0	Claws.
0:32.2	The claw.
0:33.8	Claws are a standard feature among most vertebrate animals.
0:40.9	Tetrapod or land walking animals.
0:43.8	Claws are those little hard curved parts at the ends of the toes and fingers.
0:49.1	Most of us have probably gotten on the wrong end of a claw once or twice.
0:52.5	Yep.
0:53.2	These structures are very common, very familiar, and fairly straightforward as structures, but very
1:01.6	diverse, with some very interesting history and difficulty defining certain versions and
1:10.7	aspects.
1:11.3	So we are going to go through and talk about what makes a claw a claw.
1:14.8	Like how do we define it?
1:16.3	What do we see them used for?
1:17.7	How do we see them taking different forms?
1:19.1	But also, what do we know about their evolution?
1:21.6	And how do we study them in the fossil record?
	...

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