Existence
Ugh
(ref: Space Ghost and Dino Boy in the Lost Valley | Animated Cartoon TV Series (a.k.a., 'Space Ghost'), CBS, Hanna-Barbera Productions, Launched: 1966)
Imaginary (Existence)

Possible Inspiration
Neanderthal
(Homo neanderthalensis)


Imaginary
 

Space Ghost and Dino Boy Dino Boy and Ugh Production Cel (modified to include only Ugh)
Heritage Auctions
https://comics.ha.com/itm/animation-art/production-cel/space-ghost-and-dino-boy-dino-boy-and-ugh-production-cel-and-key-master-production-background-setup-hanna-barbera-19/a/7142-96054.s

Ugh Collectibles Gallery
Qty. Sets
2
Qty. Items
10

Fher 1971 Dino Boy Collector Cards
Unidentified Dino Boy & Jonny Quest Story Stickers