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 difficilis

Author:	Stebbing, 1920
Family:	Chirostylidae
WoRMS:	URL