Boring Centiworm

The boring centiworm split from its ancestor the rainforest centiworm. It is smaller than its ancestor and now mainly eats the wood of trees; this includes both living and dead trees. It has evolved sharp teeth on each mandible for boring through the wood. Like its ancestor one of its three mandibles has chemoreceptive hairs on it, which it uses to sniff out wood as well as determine where it should go. Its underside fins are merged with its belly and are used as "scoots" to help it move through the wet soil, and has developed many more segments so it bends easier in this substrate. Those that live in the temperate climate can stay dormant during the winter. When spring comes around they become active again. It breathes between its segments and must be in moist soil otherwise its micro-lungs will dry out and suffocate the creature. It must use puddles to lay its spore-like eggs. They do this once a year where each of the three genders expels its part of the reproduction process. They require one egg-like spore, one sperm and one hormone cell. Without the hormone cell from the third gender bonding to the egg-like spore, it will not allow the sperm to enter the egg-like spore.