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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Platyhelminthes (flatworms)
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Class Trematoda
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Order Echinostomida
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Family Psilostomatidae
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Genus Astacatrematula
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Genus Gyrosoma
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Genus Mesaulus
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Genus Pseudopsilostoma
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Genus Psilochasmus
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Genus Psilostomum
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Genus Psilotornus
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Genus Ribeiroia
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Genus Sphaeridiotrema
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Genus Stephanoproraoides
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