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Spiralia
clade, animals
Nucleotide Protein
unclassified Leptochiton (in: chitons)
chitons
unclassified Sycon
sponges
Priapulimorphida
order, priapulids
Priapulimorpha
class, priapulids
Xenoturbellidae
family, animals
Xenacoelomorpha
phylum, animals
Scalidophora
superphylum, animals
Lophotrochozoa
Ecdysozoa
Golfingiida
order, peanut worms
unclassified Cerebratulus
ribbon worms
Leptochiton
genus, chitons
Sipunculidea
infraclass, peanut worms
Paragordius
genus, horsehair worms
Gordioidea
superfamily, horsehair worms
Gordea
order, horsehair worms
Echiurus
genus, spoonworms
Eleutherozoa
clade, echinoderms
Lepidopleuridae
family, chitons
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