The origin of insects, and what are the other names of insects in insect records?

According to scientists' estimates, Earth's insects originated in the Ordovician period, about 100 million years ago.

Occurs around the same time as terrestrial plants. The first insects evolved from a group of crustaceans on land. But about 400 million years ago, in the Devonian period, a lineage of insects evolved the first insects that could fly.

The oldest insect fossils are estimated to be 400 million years old, but the identity of the fossils as insects has been debated. in the history of the earth.

There have been several changes in global climate conditions, and with them the diversity of insects. Pterooptera (winged insects) experienced a great species dispersal in the Carboniferous period (100 million to 100 million years ago), while endoptera (insects that go through different life stages) in the Permian.

100 million to 100 million years ago) experienced another great species diffusion.

Most of the extant insect orders developed during the Permian period. About 100 million years ago, during the mass extinction of the Permian-Triassic border, the largest extinction event in Earth's history, many early insect species became extinct. The survivors of this event evolved into the modern order Insects in the Triassic (100 million to 100 million years ago), which continues to this day.

Most of the modern insect families occur in the Jurassic period.

100 million to 100 million years ago).

An important example of co-evolution is the many highly successful insect populations – notably the Hymenoptera (wasps.

bees and ants) and Lepidoptera (butterflies, moths) and many types of Diptera (flies.

and Coleoptera (beetles) – evolved with flowering plants during the Cretaceous period (100 million to 66 million years ago).

Many modern insect genera developed during the Cenozoic Era, which began about 66 million years ago. From this period onwards, insects are often kept in amber and are usually in good condition. Such specimens can be easily compared with modern species, most of which are members of extant genera.

Insects are of great variety and morphology, belonging to the arthropods of invertebrates, and are the most abundant animal group on the planet, accounting for more than 50% of all biological species (including bacteria, fungi, and viruses), and their traces are found in almost every corner of the world. Until the beginning of the 21st century, there were more than 1 million species of insects known to humans, but there are still many species yet to be discovered. Insects are the most diverse and abundant in the animal kingdom and have a significant impact on agricultural production and human health.

The most common are locusts, butterflies, bees, dragonflies, flies, grasshoppers, cockroaches, etc. Not only are there many species of insects, but the number of individuals of the same species is also staggering. The distribution of insects is so wide that no other class of animals can compare with it, and it is almost all over the earth.

There are different types. Most insects can be used as specimens, and they are a good biological resource that humans can use.

Nicknames and appearances of insects in "Insects":

1. Ladybug - the "lady" in the garden:

The adult of ladybugs has a long body with a short ovate to round body shape, a strongly arched dorsal body, and a usually flattened ventral surface.

2. Dung beetle - the story of the dung ball:

Dung beetles are black and slightly shiny, with males and females slightly smaller than they are. The female has a fan-shaped front of the head,** with a large and upward creeping angular process at the base. There are compound eyes posteriorly, the dorsal plate of the thorax is densely covered with well-proportioned small rounded processes, the feet are stout, and there are rows of maroish burrs on both sides of the tarsal joints of the middle and hind feet.

3. Fireflies - starry fireflies:

Fireflies have 6 short legs and a variety of colors, with a chestnut-brown body, a red chest, and some bright red spots dotted around the edges of the ring-shaped costume.

4. Cicadas - Sing for yourself:

The cicada has two pairs of membranous wings and is essentially the same shape, with a broad, short head with a distinctly prominent frontal-labial base. Visual acuity is quite good, the compound eyes are not large, located on both sides of the head and widely separated, and there are 3 monoculars.

5. Praying mantis - a beautiful "killer":

medium to large insects with triangular heads and free movement, compound eyes large and bright; antennae elongated; The neck can be rotated freely. The leg and tibia of the forefoot have a sharp spine, and the tibia is sickle-shaped, often folding towards the leg joint, forming a forefoot that can catch prey; forewing cortex, overwing, lacking anterior marginal domain, hindwing membranous, hip domain developed, fan-shaped, stacked on dorsal at rest; Abdominal hypertrophy. Compound eyes are prominent, with 3 in one eye.

Chewing mouthparts with a strong palate. The forefoot catches the foot, and the middle and hind feet are suitable for walking.

There are many kinds of insects in the insect book, and the following are just a few of the common insects:

1. Dry mud bees like to build their nests in humid and warm places, they often build their nests in chimneys, the temperature in the chimney is suitable for the survival of dry mud bees, but the young of dry mud bees often suffocate to death, so dry mud bees will build their nests in wide chimneys.

2. From the appearance, the firefly has six short legs and likes to walk with its feet, and when the male firefly is fully developed, it will grow wings, like a beetle, because it is a beetle itself, and the female firefly is in a larval state for life.

3. When crickets choose a place to live, they will not choose a naturally formed hidden place, because these holes are not suitable, they are built very sloppily, there is no safety guarantee, they usually choose those places with excellent drainage conditions and sufficient sunlight, and they have to build their own noisy halls after they choose.

4. The hind feet of the grasshopper are strong, with a large belly, and they are good at jumping. Born in wild grasses, low forests, shrubs, usually hidden in grass, or crawling, perching, and foraging for jujube food on the stems in front of the plant bench. It mainly eats the stems, leaves, melons, fruits, etc. of plants.

(1) Cockroaches are one of the oldest insects on the planet and once lived in the same era as dinosaurs. According to fossil evidence, primitive cockroaches appeared on Earth about 400 million years ago in the Silurian period. The fossils of cockroaches that we find or the cockroaches we find in coal and amber are not much different from those found in your cupboards.

Its appearance has not changed much over the centuries, but its vitality and adaptability have become more and more tenacious, and it has multiplied to this day, widely distributed in all corners of the world. (2) Dragonflies are one of the oldest insect species ever recorded on Earth.

3) Termites are the oldest social insects The earliest prototype of insects was aquatic arthropods, which gradually evolved into their current appearance. Fossil evidence suggests that the earliest insects on Earth appeared in the early to mid-Devonian period. For example, the rhyniella praecursor of springtails (springworms), which were probably scavengers living in the soil at that time, were probably scavengers that preceded herbivorous food.

The earliest ancestors of insects lived in water, it looks like a worm, also like an earthworm, the body is divided into many movable links, the front link has bristles, when moving constantly to the surrounding touch, playing a sensory role. Underneath the head and the first link, there is a small hole that looks like a food harvest. This simple worm-shaped animal is considered to be the common ancestor of rings, hookopods and arthropods, and is also the ancestor of insects.

With the extension of time, the limb function of insects has evolved and gradually appeared on the land stage. In order to adapt to life on land, their body structure has undergone great changes, from the original more annular body segments and appendages to the three major body segments of the head, thorax and abdomen. This evolutionary process has taken about 200 million to 300 million years, and it continues to evolve at a slow pace.

Early insects grew from small to large, but the difference was that the number of nodes in the body changed, and the sexual development changed from immature to mature. At that time, they did not have obvious wings on their bodies that could be used to fly, and their original gastropods were not completely degenerated. Later, some species of gastropods evolved into organs for jumping; Some species still retain their original body shapes, such as the springtails, protocerodas and diplodas of the subclass Spanos, which are now classified as springtails, protoceras, and diploceras.

Over time, around the end of the Devonian period, some insects evolved from wingless to winged.

It's early, very early. Insects belong to the category of arthropods.

And arthropods were the first to land.

In the early Ordovician of the Paleozoic Era, about 500 million years ago, plants began to land and evolved from algae to bryophytes that could initially adapt to life on land. At this time, there are aquatic arthropods that feed on plants and begin to try to land.

In the late Ordovician period, about 100 million years ago, when plants had evolved into ferns that were fully adapted to life on land, arthropods also evolved their ability to adapt to land, becoming the first land dwellers among animals.

At this time, insects, as the most diverse and abundant group of arthropods, began to multiply on land.

In other words, insects have appeared on land for almost 500 million years.