非洲爪蟾
The Pipidae are a family of primitive, aquatic frogs, with representatives both in Southern Africa and South America. The most famous member is the African clawed frog, or Platanna. This frog is a model organism for biological study, and it was once used extensively for pregnancy tests, where the urine from pregnant women induced the frog to lay eggs. The platanna may be the source of the chytrid fungus that is devastating frog species worldwide. A less well-known relative is the Cape platanna, which is endangered.