In the late Permian, 260 million years ago, the beetle quietly appeared on the earth’s continent. It evolved from an insect with two pairs of wings. When the beetle first appeared, its body was very large, reaching three At four meters, this was due to the atmospheric environment with extremely high oxygen content at the time. As the amount of oxygen in the atmosphere decreases, their bodies become smaller and smaller, and eventually become what they are today.
The beetle, like other insects, has three parts, a head, a chest, and an abdomen. It has six feet. The beetle’s head has opposite antennae. The shape of the antennae varies. Most of them are divided into 10 to 11 sections. Male antennae are more developed than females. The structure of the mouthpiece is suitable for chewing, and some are suitable for sucking juice. There are usually 10 knots in the abdomen. There is a hard shell on the outside of the body. The front wing is horny, thick and hard. The hind wing is membranous, but some nodes have been degraded or deformed, so you can see 8 or 9 knots. Their biggest animal is that the front wing evolved into a hard wing. Sheath, then spread the thin hind wings and fly into the air. The color of the wing sheaths is changeable, some are golden, some are spotted like leopard skin, some are motley, and some beetles’ wings are connected together. The hind wings are degraded and can not fly, such as walking bugs.
We speculate that the earliest angiosperms may be pollinated by beetles. Its original neckline is suitable for pollinating some large and flat flowers, which are more primitive than the original type. At the same time, the scent released by these flowers also attracts beetles and angiosperms. The use of beetles for pollination can significantly enhance their viability. When angiosperms continue to derive new varieties, the beetles have spread to other parts of the world, and more species have evolved. Now they have reached more than one million species.
According to different living habits, the structure of the beetle’s feet is also different. Some legs are up and suitable for jumping; some have cilia suitable for swimming. A beetle is a completely metamorphic insect. It grows into four stages: eggs, larvae, pupae, and adults. The size and number of eggs are different. Some of their larvae can move freely, and some of them often hide in hiding places. Most of the larvae pupate in hiding places in the earthen owl. No cocoon, but some species will cocoon to protect the pupae. Some beetles only need one week from larva to adult, while others take 20 years. Depending on their diet, tentacle shape, wings, etc., beetles can be divided into Carnivorous, polyphagous, kisses three major categories. Beetles have spread all over the world, and some of them are non-toxic and non-aggressive breeds are also loved as ornamental pets.