Mermithida -  Mermithida is an order of nematode worms. The order includes two families and most members are endoparasites on arthropods. The morphological characteristic of the order is the presence of a stichosome. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
The answer to this question is:
Animal