Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Annelida
Classis: Polychaeta
Subclassis: Echiura
Ordo: Echiuroidea
Familia: Echiuridae
Subfamilia: Thalassematinae
Genus: Lissomyema
Species: L. exilii - L. muellita
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