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Author Topic:   Evolution. We Have The Fossils. We Win.
arachnophilia
Member (Idle past 1344 days)
Posts: 9069
From: god's waiting room
Joined: 05-21-2004


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Message 121 of 2887 (769390)
09-20-2015 3:42 PM
Reply to: Message 120 by Dr Adequate
09-20-2015 1:46 PM


Re: Moved Post: There's Just Something Funny about the Transitionals Idea
Dr Adequate writes:
It's called a Spinosaurus,
btw, your spinosaurus reconstruction is wrong. some of the missing portions (like the legs) were reconstructed from closely related dinosaurs. apparently, it should look a bit more like this:
crazy, right?
Because mammals evolved from reptiles.
well, they didn't. there's no clear clade we can associate with "reptile" except maybe sauropsids, and the ancestors of mammals actually diverge lower than sauropsids. mammals evolved from synapsids, which aren't exactly reptiles. they're kind of reptile-like amniotes.
some people use "reptile" as a kind of evolutionary grade, because the things we call "reptiles" are a paraphyletic grouping, including a bunch of things but not their common ancestor, and excluding certain crown groups like mammals and birds.
Edited by arachnophilia, : No reason given.

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This message is a reply to:
 Message 120 by Dr Adequate, posted 09-20-2015 1:46 PM Dr Adequate has replied

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