1, giant shrimp
Giant shrimp is a very strange ancient creature, which has the characteristics of squid and shrimp. Its body length reaches 1 m, and its mouth is full of sharp teeth. Giant shrimp fossils, found in China, are ancient underwater arthropods that lived about 500 million years ago.
It may feed on small crustaceans and swallow them with sharp teeth. Its teeth are like serrated knives, and its powerful jaws can catch bigger prey.
2. Giant horseshoe crab
This is the largest trilobite species discovered so far, with a body length of 60 cm. They lived in the Paleozoic era about 500 million years ago, devouring rotting biological corpses on the seabed.
It is very similar to horseshoe crab, with a thick shell and compound eyes, and its body is segmented. Giant horseshoe crabs and other trilobite species are relatively simple and adaptable creatures, which have survived for 300 million years.
3.giant dragonfly
Modern dragonflies are small, but their ancestors were big. In ancient times, giant dragonflies had a wingspan of 60 cm and a body length of nearly 40 cm.
This huge body led researchers to speculate that it might feed on animals the size of frogs and squirrels. The reason for the extinction of this huge prehistoric dragonfly is that the oxygen content in the earth's atmosphere began to rise millions of years ago.
4.giant snail
The largest snail species today is the African giant land snail, with a body length of 18 cm and a shell diameter of 9 cm. However, their prehistoric giant snail Giganteum is considered to be the largest snail in the history of the earth, with a body length of nearly 60 cm. Paleontologists believe that they lived in the Eocene ocean 50 million years ago.
5.giant sea scorpions
Giant sea scorpion fossils were first discovered in Germany in 2007, with a body length of 2.4 meters. In fact, only one pliers is more than 46 cm long. This species disappeared in the Permian period 250 million years ago.
6, land killer scorpion
Kirktonensis is another ancient scorpion species. They live on land and can be up to 60 cm long. They lived in Devonian about 400 million years ago. It is likely that they feed on small arthropods and insects, and their bites are enough to kill some animals.
7. Foundations
Judging from the fossil remains of the obelisk, its body length can reach 9 meters. It may be the largest marine predatory food species in paleontology. They look for food in the sea and ambush their prey. According to the analysis of paleontologists, it is basically a blind creature, like the modern close relative species Nautilus, which is a floating object in the ocean.
8.giant centipede
Euphorbia is very similar to modern centipede in appearance and behavior, but the difference is that its body length exceeds 1 meter. Archaeologists have found this ancient giant centipede fossil in Europe and North America, and scientists are not sure about their food. In contrast, modern centipedes are only 25 cm long and can prey on birds, snakes and bats.
9.giant clam
Platinum snail is one of the largest bivalves discovered so far in the history of the earth, with a body length of 3 meters. In contrast, their volume is 2.5 times that of modern giant clams.
10, ancient centipede
The ancient centipede is the ancestor species of centipede and millipede, and its body length can exceed 2.4 meters. It is an obese ancient creature and one of the few invertebrate carnivores found at present. They lived from Carboniferous to early Permian, and lived in present-day North America and Scotland about 300 million years ago.