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[Linked Image from i.pinimg.com]

This one is Bud Root/Arthur Adams art.
I love how she's riding the diosaur like a wild bronco.


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EDIT: I looked to find this elsewhere to identify it. On Arthur Adams' own website, it's titled as "Jonnie Future", and (my eyes were bleeding, to try and read print that small) done maybe in 2001.
I thought it might be a John Carter:Princess of Mars variant cover, but from what I could find it's not, and is apparently a new character by Arthur Adams.
On Adams' own site, I also saw nothing to indicate it's a Budd Root/Arthur Adams collaboration, just Adams by himself, apparently miscredited where I first saw it.
Here's a slightly larger image, to see the detail :
https://i.pinimg.com/originals/93/6a/8c/936a8c7f97774e8427f275876e790d0c.jpg