The Animal Encyclopedia column provides comprehensive and rich animal encyclopedia Guides. It is a good platform to understand the living habits, special abilities, and distinctive characteristics of household pets, domestic livestock, and wild animals. Comprehensive animal-related Guides will enrich your
The only order in the subclass Metatheria is the Marsupial order. It has experienced great development since it originated from the ancestors of ancient mammals in the Cretaceous period. It is widely distributed around t···
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After experiencing the catastrophe at the end of the Mesozoic Era until modern times, there is still a primitive mammal hiding in Australia's "Utopia". This is the platypus living in Australia (and the echidna living on ···
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We already know that the tragic mass extinction of the dinosaurs marked the end of the Mesozoic Era. In fact, it was not just the dinosaurs that became extinct. Those aquatic reptiles that were once widely distributed in···
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A large number of primitive mammal fossil skeletons discovered in the Triassic strata of South Wales, England, are representatives of the earliest mammals on the earth. Paleontologists named them Morganotherium and place···
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As early as the late Triassic, when dinosaurs had just entered the evolutionary stage, a group of small animals that were inconspicuous at the time differentiated from therodonts among therapsid reptiles. They were born ···
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Frogs, toads and salamanders are familiar amphibians. They are still active in ponds, rice fields, swamps, streams, rivers and wet places on land. All these living amphibians belong to a large family, the "slip-bodied am···
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Most conchovertebrates are small amphibians, adapted to life in shallow water and swamps. They first appeared in the Early Carboniferous Epoch and became extinct at the end of the Paleozoic Era, never flourishing. They a···
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Labyrinths are the earliest terrestrial vertebrates to appear on earth. They flourished in the Carboniferous and Permian periods, and a few species continued into the Triassic period. Its cone-shaped teeth have a labyrin···
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The origin of amphibians probably occurred in the late Devonian period. At that time, a certain species of lobe-finned fish landed on land, creating a new direction of adaptation and evolution. This was an adventure for ···
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At the end of the Devonian period, a certain kind of lobe-finned fish ventured out of the water and climbed onto land, becoming the earliest amphibians. Since then, vertebrates have entered a new world completely differe···
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We Chinese have long known that turtles are long-lived animals, so there has been a proverb from ancient times: "A thousand-year-old king, an eighty-thousand-year-old turtle". But do you know? In the evolution of vertebr···
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For a long time, the scientific community has believed that lobe-finned fishes, including coelacanths, were extinct from the earth as early as the early Cretaceous period. Humans can only understand this type of fish-sha···
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Because lungfish have lungs and internal nostrils that can breathe air, they have long been considered the earliest terrestrial tetrapod vertebrates—the ancestors or close relatives of amphibians. By the end of the 19th···
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The earliest representative of lobe-finned fish is the skeletal fish of the middle Devonian period. From it, we can actually see some "signs" of early amphibians. bony fish First of all, the skull and upper and lower jaw···
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The earliest representative of lungfish is the bifin fish of the middle Devonian period. On this basis, lungfishes were relatively prosperous from the Late Devonian to the Carboniferous, and only a few extremely speciali···
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During the Devonian period, the earliest lobe-finned fishes appeared and differentiated into two major categories: lungfishes (order) and lobe-finned fishes (order). Unlike ray-finned fishes, early lobe-finned fishes had···
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We already know that based on the development of the temporal part of the skull, that is, the relationship between the development and changes of the temporal foramen, scientists divide reptiles (classes) into four subcl···
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There is a city called Seymour in Texas, USA. A large area of early Permian sediments is exposed in the north of the city. The famous fossil representative of salamanders between reptiles and amphibians was found here. O···
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Reptiles are the earliest amniotes to appear on earth. They evolved from labyrinths among amphibians. The transition from amphibians to reptiles occurred in the Carboniferous Period, and the transition must have been mar···
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Actin-finned fishes are the most successful aquatic group of all vertebrates, occupying almost all ecological niches in waters on Earth. There are many kinds of them, varying in size, and their adaptability is like "Eigh···
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In the middle Devonian period, some more advanced bony fishes appeared. Part or all of their bones ossify into hard bone. The outer layer of the skull is made up of a large number of bone fragments joined together in a c···
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The sharks we are familiar with are cartilaginous fishes. Nearly all cartilaginous fishes are marine animals. Throughout their life history (the entire process of a living organism from beginning to end), their skeletons···
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Life originated in the primitive ocean, and the earliest vertebrates were also born in the waters. Both armored fish and placoderm fish once flourished in Earth's waters, but they soon withdrew from the stage of history.···
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The most primitive gnathostomes discovered so far are placoderms (class). They first appeared in the late Silurian Period and flourished for a while in the Devonian Period. Placoderms also have bony armor to protect thei···
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