from Wiktionary, Creative Commons Attribution/Share-Alike License.
- proper noun A taxonomic
phylumwithin the kingdom Animalia— aquaticanimals of disputed taxonomy.
Sorry, no etymologies found.
Together, the two Xenoturbella species and hundreds of acoelomorph species constitute a newly-classified phylum, which the researchers named Xenacoelomorpha.
Xenacoelomorpha is on roughly the same branch of life's tree as sea stars, sea cucumbers and acorn worms - not the most complicated animals, but far more complex than what the acoelomorphs were thought to be.