[Economic significance] Commonly known as cockroach. Some species live indoors and are good at running around, feeding and contaminating food, clothing and daily utensils, leaving behind unpleasant odors and spreading diseases and parasites. They are global health pests. Some types are traditional Chinese medicinal materials that can be used to treat illnesses and save lives. A few species living in the wild are harmful to crops.
[Identification points] Body length 2-100 mm, body flat, oval. The head is hidden under a broad, shield-like pronotum and slopes backward. The mouthparts are chewing; the antennae are filamentous; the compound eyes are kidney-shaped. The legs have many stinging hairs and the tarsal segments are 5-segmented. The wings are long or short, the forewings are leathery, the hind wings are membranous, and the wing veins are multi-branched. Abdomen 10 segments. The tail is knobbly.
[Species and Distribution] There are about 3,700 known species in the world, most of which are distributed in tropical and subtropical regions, and a few are distributed in temperate regions. my country has recorded 240 species in 18 families, 60 genera, and is distributed throughout the country. Cockroaches generally live under rocks, bark, fallen leaves, garbage piles, or in rotten wood and various caves. People are especially familiar with the species that live indoors.
The characteristics of this order can be summarized as follows: Blattella are afraid of light and prefer darkness, with shield-shaped front chest and head; flat oval body and long antennae, flat and wide base segments and spiny legs.
animal tags： Insects Blattales cockroaches
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