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Amphioxiformes
order, lancelets
Nucleotide Protein
Leptocardii
class, lancelets
Meioglossus
genus, hemichordates
Nucleotide
Harrimania
Ptychodera
Ptychoderidae
family, hemichordates
Deuterostomia
(deuterostomes), clade, animals
Harrimaniidae
Enteropneusta
(acorn worms), class, hemichordates
Hemichordata
(hemichordates), phylum, hemichordates
Branchiostoma
genus, lancelets
Branchiostomatidae
(lancelets), family, lancelets
Cephalochordata
subphylum, lancelets
Chordata
(chordates), phylum, chordates
Meioglossus psammophilus
species, hemichordates
Harrimania kupfferi
Ptychodera bahamensis
Branchiostoma lanceolatum
(amphioxus), species, lancelets
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