Figure 1From: Immunolocalization of serotonin in Onychophora argues against segmental ganglia being an ancestral feature of arthropodsRepresentatives of two major onychophoran taxa used for this study. (A) Anterior end of a walking specimen of Metaperipatus blainvillei (Onychophora, Peripatopsidae) from Chile. (B) Epiperipatus biolleyi (Onychophora, Peripatidae) from Costa Rica.Back to article page