Wingless insects (details)

(1) protocauda is a representative species, a rare small insect, and no fossils have been found. There are about 70 genera and 600 species, and there are 34 genera 164 species in China.

(2) collembola, representing collembola or collembola, is a small insect, which is abundant in the soil or fertile soil of deciduous piles. The oldest fossil was found in the Devonian old red sand layer in Britain, but there is no fossil report in China, with 6,000 species belonging to 5 16 genera and 66 species 193 species in China.

(3) Diptera, a representative species of Diptera, a simple insect, crawls on three bipeds. These fossils appeared in the Late Carboniferous in North America, which has not been reported in China. There are about 84 genera and more than 800 species in China.

④ Microcoryphia, a representative species of Lithocarpus, formerly known as Thysanura, is a small insect with scales and three tails on stones. It first appeared in French and Russian Late Carboniferous, but it has not been reported in China. There are more than 250 species belonging to 65 genera, and there are 5 genera 13 species in China.

Zygentoma, representing the species of Chlamydomonas and Lepidoptera. Carnivora is a small silver insect, which has no wings and avoids light. The fossil first appeared in the late Carboniferous in the United States, but it has not been reported in China. There are about 3000 species belonging to 50 genera, and there are 7 genera and 8 species in China. [