Lancelets are classified in the taxonomic group cephalochordates .
These organisms are in the kingdom Animalia , the phylum Chordata , the class Leptocardii , and the order Amphioxiformes .
Amphioxiformes are classified in the taxonomic group cephalochordates .
These organisms are in the kingdom Animalia , the phylum Chordata , the class Leptocardii , and the order Amphioxiformes .