Hofsteniidae

Hofsteniidae is a family of acoels. This family contains seven species in three genera.

This worm ranges in size from 100 μm for embryos to 500 μm for adults, and exhibits "whole-body regeneration" capability, where entire body parts regenerate when removed from the body. They have a simple nervous system and a bowel sac with no way out.

Genera
There are three genera in the family Hofsteniidae.
 * Hofstenia Bock, 1923
 * Hofsteniola Papi, 1957
 * Marcusiola Steinböck, 1966

Species
There are seven species in the family Hofsteniidae.