Oxa
- Oxalaniscus
Ox
Oxinasphaera Bruce, 1997
- Oxinasphaera australis (Baker, 1928)
- Oxinasphaera aylostera Bruce, 1997
- Oxinasphaera bispinosa (Baker, 1910)
- Oxinasphaera bisubula Bruce, 1997
- Oxinasphaera brucei Kensley & Schotte, 2005
- Oxinasphaera copiapoa Bruce, 1997
- Oxinasphaera corypantha Bruce, 1997
- Oxinasphaera denmoza Bruce, 1997
- Oxinasphaera epostoa Bruce, 1997
- Oxinasphaera frailea Bruce, 1997
- Oxinasphaera furcata Schotte & Kensley, 2005
- Oxinasphaera islaya Bruce, 1997
- Oxinasphaera kensleyi Bruce, 1997
- Oxinasphaera lobivia Bruce, 1997
- Oxinasphaera lowryi Bruce, 1997
- Oxinasphaera matucana Bruce, 1997
- Oxinasphaera multidens (Richardson, 1910)
- Oxinasphaera obregonia Bruce, 1997
- Oxinasphaera parodia Bruce, 1997
- Oxinasphaera penteumbonata Benvenuti, Messana & Schotte, 2000
- Oxinasphaera poorei Bruce, 1997
- Oxinasphaera rebutia Bruce, 1997
- Oxinasphaera tetrodon Schotte & Kensley, 2005
- Oxinasphaera thetisae Bruce, 1997
- Oxinasphaera tripartita (Richardson, 1910)
- Oxinasphaera tual Bruce, 1997
- Oxinasphaera tuberculosa (Stebbing, 1873)
Crustacea → Malacostraca → Isopoda → Sphaeromatoidea → Sphaeromatidae
Oxy
- Oxyarcturus
- Oxycephalidae
- Oxycephalus
- Oxynaspididae
- Oxynaspididae
- Oxynaspis
- Oxypleurodon
- Oxyrhynchaxius
- Oxyurella
- Oxyurostylis