Reference

Si-Qin Ge, Jing Ren, Yi Hua, Adam Slipinski, Bruce Heming, Rolf Georg Beutel, Xing-Ke Yang, Benjamin Wipfler (2015): Transformation of head structures during the metamor-phosis of Chrysomela populi (Coleoptera: Chrysomelidae) – Arthropod Systematics and Phylogeny – 73: 129 - 152.