Fig. 2
From: Conservation and flexibility in the gene regulatory landscape of heliconiine butterfly wings
Principal component analyses of RNA samples for each species clustered by stage, with the exception of three samples of Agraulis vanillae form the day 2 stage, which formed a separate cluster. d The dissection scheme used for tissue collection: FP proximal forewing, FM medial forewing, FD distal forewing, HA anterior hindwing, HP posterior hindwing. e depicts the three butterfly species used: H. melpomene rosina, H. erato demophoon (race formerly designated petiverana) and Agraulis vanillae