User blog comment:Lamango/Check out who I found in this Rebirth of Mothra book about Dagarha/@comment-25285745-20160204172015

If this is part of an actual official book and not fan-made, then it ironically looks like Kadokawa borrowed some ideas from this for their Gamera vs. Barugon Manga, which showed that the Atlanteans also created Barugon, Jiger and Zigra.