The range of egg capsule morphology within the phasmatodea and its relevance to the taxonomy of the order

Abstract

Within the order Phasmatodea there is a basic egg capsule morphology which defines the order. This shows extensive variation in detailed form. Some of this is aberration, which can be recognised and excluded from taxonomic considerations. Much is adaptation to egg‐laying techniques and egg survival. Nevertheless the range of egg capsule form both externally and internally is a valuable aid to the classification at sub‐ordinal level and below of this group of insects. In particular this confirms the Timematodea as members of the order, confirms the distinct status of Phylliidae and shows some so far undivided groups such as Necrosciidae to be taxonomically very diverse. A new tribe Extatosomatini is proposed for Extatosoma Gray on the basis of both egg and adult morphology. A survey of internal micropylar plate types within the order is given.