Taxon tree

Infraorder Anomura
Infraorder Brachyura
- Section Eubrachyura
- Section Podotremata
  - Superfamily Cyclodorippoidea
  - Superfamily Dromioidea
  - Superfamily Homolodromioidea
  - Superfamily Homoloidea
  - Superfamily Raninoidea
    - Family Lyreididae
    - Family Raninidae
      - Genus Cosmonotus
        
        Species Cosmonotus genkaiae
        
        Species Cosmonotus grayii
        
        Species Cosmonotus mclaughlinae
      - Genus Cyrtorhina
      - Genus Erroranilia
      - Genus Flaberhina
      - Genus Notopoides
      - Genus Notopus
      - Genus Notosceles
      - Genus Ranilia
      - Genus Ranina
      - Genus Raninoides
      - Genus Symethis
      - Genus Umalia

Cosmonotus

Genus, White, 1848