Spiralian orders

The Chaetonotida is an order of gastrotrichs. They generally have a tenpin or bottle-like shape.

Macrodasyida is an order of gastrotrichs. Members of this order are somewhat worm-like in form, and not more than 1 to 1.5 mm in length.

Heterocyemida is an order of parasites which dwell in the renal appendages of cephalopods.