User blog comment:Lord Loss/Monster Hunter Frontier Season Forward 5/@comment-4009941-20130206082334/@comment-3426677-20130208091513

Jp wikis list them as ヴォルガノス【金種】, ヴォルガノス【銀種】. Gold and Silver species. Click on names for damage tables. Gold weakness is Ice>Dragon, Silver weakness is Thunder>Dragon.