chætospira

from The Century Dictionary.

• noun A genus of heterotrichous infusorians, of the group of the stentors or trumpet-animalcules, having a slender, spirally twisted, ribbon-like extension of the anterior region, and a lateral hyaline expansion along the peristome. It includes sedentary loricate infusorians, the zoöids of which are not attached to the sheath, as C. muelleri.