Details of female phylliid antennae illustrated from specimens within the RBINS collection, illustrations by Julien Caudron (RBINS). Note that the figures start with the scapus, therefore the diagnostic fourth antennomere is the third one shown; to ensure clarity A has the segment number listed to the right of the image. Note that the fourth antennomere of Phyllium (A) is longer than the fifth antennomere in comparison to the Cryptophyllium gen. nov. representatives (B–H), which have the fourth antennomere short and disk-like A Phyllium ericoriai, Philippines B Cryptophyllium bollensi gen. et sp. nov., Vietnam, Phuoc Binh C Cryptophyllium celebicum comb. nov., Indonesia, Sulawesi D Cryptophyllium khmer gen. et sp. nov., Cambodia, Siem Reap Province E Cryptophyllium nuichuaense gen. et sp. nov., Vietnam, Nui Chua F Cryptophyllium phami gen. et sp. nov., Vietnam, Cat Tien G Cryptophyllium westwoodii comb. nov., Laos, Bokeo Province H Cryptophyllium westwoodii comb. nov., Thailand, Chiang Mai. Drawn to relative scale.