Enoplia are a subclass of the roundworm species. Most are free-living, but the group includes the orderTrichiurida, which includes whipworms and trichina worms. The anterior sensory structures (amphids) are well developed, while the posterior ones (phasmids) are not. Classes Adenophorea Subclass Enoplia Subclass Chromadoria Secernentea Subclass Rhabditia Subclass Spiruria Subclass Diplogasteria The roundworms (Phylum Nematoda) are one of the most common phyla of animals, with over 20,000 different described species. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... The order Trichiurida includes the following families of roundworms: Trichiuridae, which includes whipworms Trichinellidae, which includes trichina worms All members of this order are histiotrophic, meaning that in at least one stage of their life cycle, they develop in cells or tissues. ... Binomial name Trichuris trichiura (Linnaeus, 1771) The human Whipworm (Trichuris trichiura or Trichocephalus trichiuris), is a roundworm, which causes trichuriasis when it infects a human large intestine. ... Trichinosis, also called trichinellosis, is a parasitic disease caused by eating raw or undercooked pork and wild game products infected with the larvae of a species of roundworm Trichinella spiralis, commonly called the trichina worm. ... ...