This chapter comprehensively reviews the phylogenetic position, morphology, reproductive strategies, and developmental biology of the ring-legged earwig Euborellia annulipes. Special reference is given to the embryonic and postembryonic development, as well as oogenesis, with particular emphasis on the role of the juvenile hormone in this process. Additionally, the influence of maternal care on offspring survival and microbiome transmission is explored. In the light of the presented and discussed analyses, E. annulipes emerges as a new model species suitable for studying the evolution of insect segmentation, anagenesis of insect ovaries, and parental investment in nonholometabolous insects.