Beetles (Coleoptera)

The order with the most numerous species, the coleoptera make up about 40% of all insect species.  Known commonly as beetles their body plan doesn’t vary drastically within the order however homologous structures are often put to different uses.  This chart shows the internal structures of a developing circulionidae larva (1) as well as external features of typical circulionidae and scarabaeidae larvae (14 & 16 respectively).  The role of embryonic tissues in development is also illustrated (17 & 18) showing the ectoderm (blue; ec), mesoderm (pink; me) and endoderm (bright yellow; ed).

The order with the most numerous species, the coleoptera make up about 40% of all insect species. Known commonly as beetles their body plan doesn’t vary drastically within the order however homologous structures are often put to different uses. This chart shows the internal structures of a developing circulionidae larva (1) as well as external features of typical circulionidae and scarabaeidae larvae (14 & 16 respectively). The role of embryonic tissues in development is also illustrated (17 & 18) showing the ectoderm (blue; ec), mesoderm (pink; me) and endoderm (bright yellow; ed).