However, the species can be classified as an octopod. Cryptoteuthis brevibracchiata, the short-arm flapjack octopod, is a deepwater species of octopod. Pohlsepia mazonensis is the earliest described octopod, originating from the late Carboniferous period. This discovery was key as it revealed a soft-bodied octopod from the Upper Carboniferous period. Opisthoteuthidae fall into the cirrate octopod group, meaning they have fins.