Her right hand, on the viewer's left, definitely looks wrong otherwise!

The Owlbear *isn't* based upon Gokinezura. Rather, both the Owlbear pachisaur figure (directly) and Gokinezura (to a lesser extent) are based upon the prototype ultrakaiju Zailus. Zailus is the parent, and the Owlbear pachisaur and the Gokinezura ultrakaiju are siblings.

Was it Kevin Lamb?

You're welcome. 👍🏻
P.S. I followed you on Flickr.

I'm glad you enjoyed my collage. For more pictures like this one, see my "Toys: Pachisaurs" group on Flickr:
www.flickr.com/groups/patch...

The 80's D&D Gold Dragon is an archtypical Eastern Dragon, but may have also been a specific pachisaur dragon:
www.flickr.com/photos/monst...

Which Chinatown pachisaur became iconic D&D monsters, what Ultraman monsters were they originally...

Owlbear= ゴキネズラ Gokinezura
Umber Hulk= アントラー Antlar's jaw on シーゴラス Seagorath's head, ダイゴロウの母 Daigoro's Mother body.

I'm proud of the Umber Hulk family tree I created, and it's an unexpected surprise to see it reposted here. I'm glad you enjoy it as well, and I hope it proved useful to you. Are you following me on Flickr? If so, what's your username?
www.flickr.com/groups/patch...