Taxon tree

Infraorder Anomura
- Superfamily Aegloidea
- Superfamily Chirostyloidea
- Superfamily Galatheoidea
  - Family Galatheidae
    - Genus Alainius
      - Species Alainius crosnieri
    - Genus Allogalathea
    - Genus Allomunida
    - Genus Coralliogalathea
    - Genus Fennerogalathea
    - Genus Galathea
    - Genus Janetogalathea
    - Genus Lauriea
    - Genus Macrothea
    - Genus Nanogalathea
    - Genus Phylladiorhynchus
    - Genus Triodonthea
  - Family Munididae
  - Family Munidopsidae
  - Family Porcellanidae
- Superfamily Hippoidea
- Superfamily Lithodoidea
- Superfamily Lomisoidea
- Superfamily Paguroidea
Infraorder Brachyura

Alainius

Genus, Baba, 1991