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The insects are numerous and varied,
Flying in the sky, running on the ground, swimming in the water,
They are distributed in all corners of the world.
More importantly,
Insects have a very long history.
How long,
Compare and see.
The dinosaurs that once dominated the earth
Appear early enough,
But by then the insects were already there
"Settled" on Earth.
Insects: It's not that I'm boasting, I've seen dinosaurs at all
Many of your friends may be very curious
So what did an ancient insect look like?
How did they live at the time?
Are there any interesting stories happening?
。。。。。。
+ Origin of insects +
Source: fineartamerica.com
The origin of insects is the starting point of evolution, but it is still uncertain which invertebrates they evolved from. Some scholars believe that insects originated in the polypods of arthropods, while others believe that they share a common ancestor with polypods and originate from a class of animals that preceded polypods.
The oldest fossil evidence of a hexapod that can be found is Rhyniella praecursor, a wingless echinopod insect from the Early Devonian period about 410 million years ago.
Later, people have found some Devonian and Carboniferous wingless insect fossils, which inevitably makes people wonder whether insects are wingless during this period. But a re-study of the early Devonian insect fossil Rhyniognatha hirsti found that it most likely belonged to winged insects, suggesting that insects had taken to the skies 400 million years ago.
Rhyniognatha hirsti mouthpiece fossil
Our speculation about when insects appeared, then, could go further, and they may have evolved quietly during the Silurian or even earlier Ordovician periods 440 million years ago.
+ Evolution of insects +
We generally believe that insects evolved from wingless insects to winged insects. The first winged species to appear are ancient winged species that cannot be folded and can only be placed flat on the back, such as ancient ephemerals and ancient dragonflies.
Source: Wikimedia Commons
Some Carboniferous and Permian insects of the time were very large, such as the giant-veined dragonfly Megaeura monyi, known as the largest insect in history.
The fossil record of the giant-veined dragonfly dates from about 317 to 247 million years ago, and is a more primitive meganisoptera. They dominated the sky long before pterosaurs, birds and bats.
With a body of about 47 cm long and a wingspan of up to 75 cm, it is conceivable that this big guy is by no means a mild vegetarian, they are fierce predators, and their prey includes small fish, amphibians and reptiles in addition to small insects.
Fossils of giant veined dragonflies
Later, on the basis of paleoptera, neopteratomys began to appear, more and more insects flew into the sky, and the development of insects in the Permian period showed a vibrant development.
By the time of the Triassic (about 245 million years ago), dinosaurs had ruled the Earth, but insects were still rapidly radiating and evolving, and modern orders, with the exception of Hymenoptera and Lepidoptera, were already thriving.
Coleoptera insect fossils
The discovery of Fossils of Sauronhofen Lithopteryx from the Jurassic period tells us that birds began their origins, and they also competed with insects in the air. This is also one of the reasons why giant insects disappear.
Entering the Cenozoic Generation, insects continue to develop and evolve, and social insects that can clearly divide labor, cooperate closely, and are organized and led have emerged. Among them, the earliest occurrence of this behavior is termites.
With the passage of time, the once-prosperous dinosaurs have become extinct, but insects continue to evolve and continue to evolve.
+ Clone dinosaurs? +
Jurassic Park
As more and more well-preserved insect amber was discovered, some specimens of blood-sucking insects were found. Therefore, some people have opened a brain hole, if you find an insect specimen that sucks dinosaurs, can you use the blood in the insects to clone dinosaurs?
Scientists have found a tick clutching a feather from an amber specimen from Myanmar, directly demonstrating for the first time that ancient ticks sucked blood from dinosaurs.
However, even if it is well preserved in amber, the dinosaur DNA in this tick has long been decomposed, and it is impossible to clone dinosaurs.
The development of insects has gone through a long process,
But even after such a long period of time,
They are still thriving.
Image source: Pinterest Google Image source see
watermark
Yan Xihai et al. "The Origin, Evolution and Causes of Insects Are Ambiguous."
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