You can support the Dinosaur Toy Forum by making dino-purchases through these links to Ebay and Amazon. Disclaimer: these and other links to Ebay.com and Amazon.com on the Dinosaur Toy Forum are often affiliate links, so when you make purchases through them we may make a commission.

avatar_Halichoeres

Fossil brittle stars reveal stages in arm evolution

Started by Halichoeres, December 07, 2017, 05:01:42 PM

Previous topic - Next topic
Print
Go Down Pages1
User actions

Halichoeres

December 07, 2017, 05:01:42 PM
This fossil preserves soft tissue, rare for an echinoderm, and show tube feet, but not the set of muscles that regulate pressure and shape within the arms, which demonstrates that the tube feet probably evolved first before the system to exquisitely control their orientation.

https://news.yale.edu/2017/12/06/ancient-brittle-star-tells-new-story-about-how-its-arms-functioned
In the kingdom of the blind, better take public transit. Well, in the kingdom of the sighted, too, really--almost everyone is a terrible driver.

My attempt to find the best toy of every species

My trade/sale/wishlist thread

Sometimes I draw pictures

ZoPteryx

#1
December 08, 2017, 07:33:13 AM
Wow, I would've guessed the opposite scenario.  Nature continues to surprise!

You can support the Dinosaur Toy Forum by making dino-purchases through these links to Ebay and Amazon. Disclaimer: these and other links to Ebay.com and Amazon.com on the Dinosaur Toy Forum are often affiliate links, so when you make purchases through them we may make a commission.

Print
Go Up Pages1
User actions