There are about 2300 species in the world, which are widely distributed all over the world. More than 30 species of/kloc-0 have been recorded in China, including Palaearctic and Oriental species. This family is generally divided into two subfamilies: Lyttinae and Nemognathinae. The common genera of Chenopodiaceae in China are Chenopodiaceae, Chenopodiaceae, Chenopodiaceae and Chenopodiaceae. The common genera of Ctenomedusae are Flea and Flea.