Phylogenetics of New Zealand stick insects (Phasmatodea)

The New Zealand stick insect fauna includes approximately 23 species. These species are related to sub-tropical taxa from New Caledonia. We have investigated their phylogenetic relationships, patterns of introgression and adaptation to the cool, temperate environments of New Zealand. Using transcriptomes and whole genome sequencing we describe the reticulate patterns of evolution among taxa caused by extensive hybridization. This has also resulted in the frequent development of parthenogenesis. We also show how colonization of cool environments has left an imprint on the genome sequences of these species.