Richard Owen wished to rename the creature Zeuglodon ( `` yoked tooth '' ) , but , per taxonomic rules , the creature 's first name remained permanent .
Richard Owen wanted to rename the creature Zeuglodon ( `` yoked tooth '' ) , but by taxonomic rules the creature 's first name remained permanent .
The orthonectids were originally described in 1877 as a class , and placed as an order of the phylum Mesozoa . Recent study shows that orthonectids are quite different from the rhombozoans , the other group in Mesozoa .