The previous pics made it look very similar to the nightmare palys, thus the assumption of similar morph. That new pic shows that its definitely unique on its own! I added the new pic for you, I hope you don't mind.
http://zoaid.com/index.php?module=Gallery2&g2_itemId=4935
http://zoaid.com/index.php?module=Gallery2&g2_itemId=4935