Mae ail achos bellach wedi cael ei gadarnhau ar safle yng Nghrychan, Llanymddyfri, ac mae trydydd achos wedi cael ei gadarnhau i'r de o'r safle gwreiddiol yng Nghoedwig Dyfi.
A second finding has now been confirmed at a site in Crychan, Llandovery while a third finding has been confirmed to the south of the original site in Dyfi forest.