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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Annelida (segmented worms)
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Class Clitellata
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Order Rhynchobdellida
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Family Glossiphoniidae
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Genus Helobdella
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Species Helobdella adiastola
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Species Helobdella californica
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Species Helobdella conchata
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Species Helobdella fusca
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Species Helobdella moorei
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Species Helobdella nigropunctata
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Species Helobdella papillata
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Species Helobdella punctatolineata
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Species Helobdella robusta
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Species Helobdella stagnalis
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Species Helobdella transversa
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Species Helobdella triserialis
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