What animals are there among insects?

There are many kinds and shapes of insects. The most common ones are mosquitoes, locusts, butterflies, bees, dragonflies, flies, Cao Meng, cockroaches and so on.

Insects belong to arthropods among invertebrates and are the largest animal group on the earth. There are more than 6.5438+million known insects, accounting for more than 50% of all biological species (including bacteria, fungi and viruses), and their traces are almost all over the world.

1, COLEOPTERA: COLEOPTERA is the largest order of Insecta, commonly known as "beetle". There are more than 330,000 species, accounting for 40% of the total number of insects. There are more than 7,000 species recorded in China. Their front wings are keratinized and hard without wings, so they are called "sheath wings", hence the name. The exoskeleton is developed and the body is hard, which can protect the internal organs. Body shape changes greatly. This kind of insect is very adaptable. The eating range of chewing mouthparts is very wide: it is divided into phytophagy-all kinds of leaf beetles and scarabs; Carnivorous beetle, tiger beetle; Saprophytic-Yan Jia; Carnivorous burial armor; Fecal feeding-dung beetles.

This group belongs to complete metamorphosis, and the larvae have different shapes due to different living environments and feeding habits. The vast majority of pupae are naked pupae, and a few are quilt pupae.

2. LEPIDOPTERA: LEPIDOPTERA is the second largest order in Insecta, second only to COLEOPTERA. Its name is because it has many scales on its body and wings. Mainly divided into moths and butterflies, * * * is characterized by siphon mouthparts, which are formed by the specialization of the outer jaw leaves of the lower jaw and the upper jaw degenerates or disappears; Completely abnormal; Body and wings are densely covered with scales and hair; Two pairs of wings are membranous, each with a closed cavity, and the wings are covered with scales to form special markings, which are often used for classification; Section 6 of tarsal bone; Tailless beard; Totally perverted. Larvae polypod type, except for three pairs of pectoral feet, generally has a pair of ventral feet at the 3rd-6th and 10 abdominal segments, but it is reduced and specialized, and the ends of the ventral feet have toe hooks; Stripes on larvae are very important in classification; Pupa is a quilt. Adults generally feed on nectar, water and other things, which are harmless (except for a few, such as fruit sucking moths, which endanger nearly mature fruits). The vast majority of larvae are terrestrial phytophagous, which harms various plants; Some are aquatic.

3. Diptera: Diptera includes mosquitoes, midges, flies, etc. , is a larger order of Insecta. Because the front wing of the adult is membranous and the rear wing degenerates into a "balance bar", it is named. Diptera is divided into three suborders: long horn, short horn and ring crack. The tentacle of Ceratoptera is more than 6 nodes, including mosquitoes, midges and gnats, which is a relatively low group; Brachionus rotifer suborder tentacles less than 5, generally 3, commonly known as "tabanus"; Cyclophilitis is what we call a "fly".

4. Hymenoptera: Hymenoptera includes all kinds of ants and bees. Hymenoptera insects have obvious characteristics, including chewing mouthparts, and the connection between the front and rear wings is completed by wing hooks. This group is widely distributed, with more than 100000 known species and at least 250000 estimated. According to whether the ventral floor contracts, it can be divided into broad-waist suborder and thin-waist suborder. Lepidoptera is a lower phytophagous group, including sawflies, tree bees, stem bees and so on. Lepidoptera includes most species of Hymenoptera, including ants, wasps and various parasitic bees.

Hemiptera: Hemiptera, composed of Heteroptera and Homoptera, with 133 families and more than 60,000 species. Heteroptera is stinkbug. It is one of the main groups of Insecta. Hemiptera insects rest with their front wings covering the back of their bodies and their rear wings hiding under them. Some groups are named "Hemicoleoptera" because of the ossification and thickening of the base of the anterior wing. The sucking mouthparts feed on the juice of plants or other animals. It is an incomplete abnormal insect. There are smelly glands in the abdomen, which will spit out volatile smelly liquid when the enemy hurts. Homoptera includes cicadas, aphids and so on. The classification of Hemiptera is still controversial. Homoptera was originally regarded as an independent order, while Hemiptera and Homoptera are still regarded as different orders in many places.

6. Orthoptera: Orthoptera is a common insect, including owl, cricket, mole cricket, locust and so on. There are more than 20,000 known species in the world, which are widely distributed. The front wing of the adult is slightly hard, which is called "covering wing", and the rear wing is membranous. This group is incomplete metamorphosis, nymphs and adults mostly feed on plants, which is harmful to agriculture, forestry and cash crops. A few species are omnivorous or carnivorous. Orthoptera is a primitive insect group, which originated from the original Orthoptera. In the last Carboniferous, it was divided into two groups, namely, long tentacle tetanus and short tentacle grasshopper. Many of them have become traditional ornamental insects because of their singing or fighting habits, such as cricket fighting and owls.

7. Polyptera: Polyptera is a small group with only two families: Lepidoptera and Cycloptera. It is distributed all over the world and recorded about 300 species. There are more than 40 species known in China, and the common ones are Gubei mud wren, Toyo giant-toothed wren and China grouper wren. Some scholars classify it as Neuroptera 1 suborder. The adults of the order platyptera are medium and large, with a body length of 8 ~ 65 mm, spreading wings of 24 ~ 175 mm, similar front and rear wings, reticulate wing veins, roof-like wing backs, and undivided front veins. The hip area of the rear wing is wide and foldable; There are many wing veins, but the outer edge is no longer divided into small forks, which can be distinguished from Neuroptera; The transverse veins of the leading edge are arranged in rows, single vein or bifurcated at the end.

8. Odonata: Odonata is a relatively primitive group of Insecta and a smaller order. Odonata is divided into three suborders: Heteroptera is collectively called "dragonfly"; Homoptera is collectively called "Agkistrodon", and two species of Interptera are found in Japan and India. There are about 5,000 species in the world and more than 300 species in China. Dragonflies are strong and their wings are flat at rest. Meretrix meretrix has a slender body, and its wings rest on its back. Pterosaur had a strong body and wings tied to its back. Odonata is an incomplete metamorphosis insect, and its larva "Hydra" preys on sexual life in water. Adults are also carnivorous species, preying on small insects, flying fast and fierce.

9. Other insects: In addition to the above 7 orders, Insecta has 27 orders, accounting for 34 orders. There are many kinds and shapes of Insecta, but they have exoskeleton and three pairs of feet, which are the same characteristics. Many of them are familiar to us: Mayflies, fierce mantis; The ubiquitous cockroach-cockroach; Annoying milkweed lice. Insects are very adaptable. Whether you like it or not, they all have a place in our lives.