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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Deuterostomia (deuterostomes)
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Hemichordata (acorn worms)
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Class Enteropneusta
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Order Not assigned
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Family Ptychoderidae
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Genus Ptychodera
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Species Ptychodera bahamensis
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Species Ptychodera ceylonica
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Species Ptychodera erythrea
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Species Ptychodera flava
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Species Ptychodera pelsarti
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