Tummorsuses

Tummorsuses split from their ancestor. To increase the efficiency of their feeding ability, they have become motile and developed a specialized external digestive fold. The inside of this fold is lined with feeding spines, and they apply digestive enzymes to break down the detritus they have taken into their fold before absorbing it. Detritus is drawn into the digestive fold using a pair of flagella derived from modified spines, which also pull them along. This is more efficient, and therefore allowed them to get larger than their ancestor.

Tummorsuses, as decomposers, participate in the ammonification stage of the nitrogen cycle. They have also developed the ability to use nitrate as an electron acceptor, which helps them to thrive in low-oxygen environments such as mud, abyss, and deep underground while also causing them to participate in the denitrification stage of the nitrogen cycle. Species in environments with fewer predators often have shorter defensive spines than those in environments with more predators.

Tummorsuses are otherwise much like their ancestor. They are simple, unicellular, and reproduce via binary fission.