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Taxon tree
Infraorder
Anomura
Superfamily
Aegloidea
Superfamily
Chirostyloidea
Family
Chirostylidae
Genus
Chirostylus
Genus
Gastroptychus
Genus
Hapaloptyx
Species
Hapaloptyx difficilis
Genus
Heteroptychus
Genus
Uroptychodes
Genus
Uroptychus
Family
Eumunididae
Family
Kiwaidae
Family
Sternostylidae
Superfamily
Galatheoidea
Superfamily
Hippoidea
Superfamily
Lithodoidea
Superfamily
Lomisoidea
Superfamily
Paguroidea
Infraorder
Brachyura
Hapaloptyx
Genus
,
Stebbing
, 1920