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Felidae

dnaoodb: professional biology database , biology encyclopedia

in biology, Felidae (Alias:Felid, Cats) It is a carnivorous feline mammal . Cats have a muscular body, a long tail to help balance, and strong and powerful limbs that are good at running, as well as sharp teeth and claws. When running, cats' claws are extended outside the sheath, and when walking, the claws are retracted in the sheath. , except for cheetahs; they have a pair of light-sensitive eyes, and their pupils change when they feel different lights.

Reginald Innes Pocock divided the extant Felidae into three subfamilies: the Pantherinae, the Felinae and the Acinonychinae, differing from each other by the ossification of the hyoid apparatus and by the cutaneous sheaths which protect their claws. This concept has been revised following developments in molecular biology and techniques for the analysis of morphological data. Today, the living Felidae are divided into two subfamilies: the Pantherinae and Felinae, with the Acinonychinae subsumed into the latter. Pantherinae includes five Panthera and two Neofelis species, while Felinae includes the other 34 species in ten genera.

The first cats emerged during the Oligocene about 25 million years ago, with the appearance of Proailurus and Pseudaelurus. The latter species complex was ancestral to two main lines of felids: the cats in the extant subfamilies and a group of extinct "saber-tooth" felids of the subfamily Machairodontinae, which range from the type genus Machairodus of the late Miocene to Smilodon of the Pleistocene. The "false saber-toothed cats", the Barbourofelidae and Nimravidae, are not true cats but are closely related. Together with the Felidae, Viverridae, hyenas and mongooses, they constitute the Feliformia.

In the Convention on International Trade in Endangered Species of Wild Fauna and Flora, 20 species of cats, including caracals, clouded leopards, and tigers, are listed as first-level protected animals, and all other species are listed as second-level protected animals. China has listed clouded leopards, leopards, tigers and snow leopards as first-level national protected animals, and lynx, prairie spotted cats, desert cats, jungle cats, rabbit cats, golden cats and fishing cats as second-level protected animals. Due to the impact of modern civilization, humans continue to develop forests and cultivate them into farmland, causing large-scale destruction of the natural ecological environment, depriving cats of the environment they need to survive, and shrinking their habitats; and in order to obtain their beautiful The furs were shipped to trading markets in various places, and crazy large-scale poaching activities were carried out, especially in some remote areas.

Scientific classification

Alias:
Felidae,Felid,Cats
Protection level:
5
Named by and Year:
Fischer de Waldheim, 1817
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordate
Subphylum:
Subphylum Vertebrata
Class:
Class Mammalia
Subclass:
Eutheria
Order:
Carnivora
Suborder:
Schizopoda
Family:
Felidae
Subfamily:
Felinae
Subfamily:
Pantheriinae
Mode Of Reproduction:
Viviparous
Reproductive Form:
Sexual Reproduction

Description

Felines are carnivorous feline mammals. Felines have a muscular body, a long tail to help balance, and strong and powerful limbs that are good at running, as well as sharp teeth and claws; when running, cats Their claws are extended outside the sheath, and they usually walk with their claws retracted inside the sheath, except for cheetahs; they have a pair of light-sensitive eyes, and their pupils will change when they feel different lights.

body fur

Most cats have spots, stripes, or rosettes, but some, like cougars and lions, have fur that is a single, uniform color. Individuals of some species are black or almost black.

Every time the elegant feline walks, powerful muscles flow beneath the soft, wonderful fur of her long, lithe body. And when they stop, every curve of their body bends into a graceful arc. They can therefore sometimes come across as lazy. But this impression was instantly dispelled when they flattened their ears and leapt up, baring their fangs and claws to attack.

If compared to the rest of the body, the feline head appears slightly larger. Due to its short nose and lower jaw, its face looks flatter compared to other animals, making its ears appear large and noticeable. The ears gradually decrease from the base upward, and the tips of the ears are either round or pointed, and stand upright.

Felines lack sweat glands on their body surface, and there are well-developed sweat glands between the toe pads, between the palm pads, lips, throat, nipple area and anus area. The fat glands are small and found only in the roof of the mouth. In males, it is more obvious on the foreskin of the penis and the upper part of the tail. Females have fat and sweat glands surrounding the anus. Males also have anal glands, which are mainly used to mark territory and attract the opposite sex.

Among cats, those that live in the coldest places have the longest fur (such as snow leopards). Tigers have fur that ranges in color from black to orange to white, and many species have dull fur with rosettes inside. Knots, spots and stripes serve as camouflage when searching for prey. While some morphs (pure black) are common among many species, completely white individuals are rare. Substantial color variation can occur within a single species, and newborn pups are often a different color than adults. For example, adult cougars rarely have spots, while cubs almost always have spots. Typically, a cat's ventral surface tends to be pale, while the face, tail, and back of the ears often have black or white markings.

head senses

The feline skull is characterized by a short snout and wide cheekbones, which exceeds more than half of the total length of the skull. The skull is approximately round in outline. The nasal bone is short and slope-shaped, the premaxilla is narrow, and the maxilla is high and short. The mandible is also short and the coronal process is high. The frontal bone is high, the zygomatic arch is thick, and it expands strongly to both sides to attach and accommodate the thick masticatory muscles. The short muzzle also strengthens and adapts to bite movements. Most species have large eye sockets, and the frontal and parietal bones are wider. The cranium is approximately round, with well-developed lambdoid ridges and obvious amorphous ridges. There is no sphenoid groove on the skull. The auditory bubble is high and enlarged. The tympanic bone only forms the outer edge of the auditory bubble. There is a bony septum inside, and the auditory bubble is divided into two parts: the inner and outer parts. The clavicle is small, underdeveloped, and not connected to the shoulder girdle and sternum. Male penis bone is degraded or has only traces. Females have 2-4 pairs of nipples.

Hearing: Felines have keen hearing and can hear many sounds that humans cannot hear. When a sound is heard, they usually turn their heads in the direction of the source of the sound, which aids hearing and vision. Like humans, cats' inner ears are composed of bony, lymph-filled semicircular channels that maintain body balance through a complex mechanism, and allow them to land safely when they fall through this mechanism rather than their tails.

Eyes: Feline eyes are large and protruding, located directly in front of the head, and face forward like human eyes. With the exception of owls and apes, cats have a binocular vision closer to humans than any other animal. Felines have a wide viewing angle and also have color vision. The pupils of their eyes can quickly change size under different lights, but they still cannot see objects in a completely dark environment. But in dim light, they can see better than most animals. When the light is bright, the pupils of feline eyes can shrink into narrow vertical slits or very small pupils, but when the light dims, these slits or small pupils expand to allow the maximum amount of light to enter.

Their eyes seem to glow in the dark (which also misunderstands many people). In fact, they are just reflecting light from external light sources. Therefore, it is conceivable that when there is no light, this "light" will not exists again. The serval cat's eyes look red in the dark because its retina lacks pigment, and those red colors are actually blood vessels.

Nose: The skin on the tip of a feline's nose is usually black, red, or pink, and it is usually cool and moist. All cats have a keen sense of smell and can sniff out prey or their favorite food at surprising distances.

Whiskers: Feline whiskers, or vibrissars, are sophisticated tactile organs found on either side of their noses, above their eyes, on their cheeks, and on the backs of their forelegs. If they are shaved, it will not only affect their appearance, but also impair their ability to feel.

Teeth: Feline teeth are not only used for attacking, but also for tearing food. They have 30 teeth, of which four large and sharp curved canines are the sharpest. Cats rely on these teeth to grip and tear apart their food or enemies. The smaller incisors (upper incisors) are mainly used to assist in biting, and they have fewer lateral teeth (premolars and molars) than most mammals. The lateral teeth of most mammals are used for grinding food. Felines, on the other hand, only use them to cut off food. Felines have short muzzles and tooth rows, which increases bite force. The loss or reduction of incisor teeth is especially obvious in cats. The typical tooth sequence of cats is 3/3, 1/1, 3/2, 1/1 =30. In most species, the upper premolars are significantly reduced, and in the lynx, they are completely lost.

Tongue: Feline tongues are rough. A domestic cat's tongue is like rough sandpaper. Larger wild cats, such as tigers and lions, are rougher. Their tongues are lined with barbed protrusions that allow them to strip flesh from the bones of their prey. Of course, all cats also use their tongues as their primary cleaning tool to groom their beautiful coats.

Jaws: Felines have short but very powerful jaws, capable of gripping prey with enough force to crush its bones. However, because the upper and lower jaws are connected by joints, the jaws can only move up and down but not left and right, so cats cannot grind their teeth. When cats close their jaws, their teeth fit together like interlocking gears. So cats can only tear or crush their food, but cannot chew it. As a result, much food is swallowed whole and eventually digested by gastric juices.

reproductive organs

Mating brings pain to all cats, not because of the biting but because of the penis of the male cat. The reproductive organs of the male cat are covered with densely packed small hooks (for example, the penis of a male tiger has more than a hundred hooks. Small hooks, each about one millimeter long). These little hooks are made of keratin, the tough, fibrous protein typically found in fingernails and claws. The small hook has two functions. First, the small hook can scrape off the sperm left by other males during previous matings. Second, it can also urge female cats to ovulate. The pain caused by the small hook scratching the vagina can stimulate the brain of female cats such as lionesses or female cats. The brain will secrete a special substance to promote the maturity of eggs in the ovaries. They must mate at least four times. This kind of Only when the concentration of hormones is high enough can the egg be fully matured, giving it a better chance of giving birth to a new life. Despite the painful process of mating, most cats still have active sex lives.

limbs toes and claws

Strong muscles in the legs allow cats to quickly generate power to pounce on prey, or generate huge explosive power as they chase prey. When they suddenly run, climb or jump, the knees and heels of their hind legs bend, providing tremendous strength. Their front legs are equally powerful and extremely flexible. They can extend their front legs when they are at a certain distance from the prey during the pursuit, grab the prey's body and hold it firmly.

The cat with the largest paws is the tiger, which has five toes on its front paws and four on its back paws. Their front claws are also powerful weapons for defense and hunting, making them perfect tools for climbing or standing on rickety tree trunks. Each of their toes has a claw, which grows from the last bone of the toe and is shaped like a hook. In order to ensure that these claws remain sharp and not broken during travel, and to make their steps silent, their claws are tucked under the soles of their feet most of the time. Felines also often keep these claws sharp by scratching or biting on rough surfaces. However, cheetahs are cats that cannot fully retract their sharp claws. Its claws are similar to those of canines. Because the claws are blunt and have a small curvature, they are always exposed. Under the paws of cats are plum blossom-shaped flesh pads, usually flesh-colored or black, which prevent them from making noise when walking, but they cannot walk on sharp roads, otherwise they may be punctured.

Distribution And Habitat

Cats are distributed throughout the world except Antarctica, Oceania, Madagascar and some other oceanic islands. Cats are native to every continent except Australia and Antarctica. In addition to domestic and wild cats (Felis catus) that are distributed around the world, cats can be found everywhere but in Australia, New Zealand, Japan, Madagascar, the polar regions, and many isolated ocean islands.

Cats mainly inhabit deserts, grasslands, jungles, humid forests or mountains. Cats are found in all terrestrial habitats except treeless tundra and polar ice regions. Most species are habitat generalists and can be found in a wide range of environments. There are also individual species that can adapt to extreme environments. For example, the best habitat for sand cats is sandy and stony deserts. Domestic and feral cats are common worldwide and are particularly prevalent in urban and suburban areas.

Evolution

The family Felidae is part of the Feliformia, a suborder that diverged probably about 50.6 to 35 million years ago into several families. The Felidae and the Asiatic linsangs are considered a sister group, which split about 35.2 to 31.9 million years ago.

The earliest cats probably appeared about 35 to 28.5 million years ago. Proailurus is the oldest known cat that occurred after the Eocene–Oligocene extinction event about 33.9 million years ago; fossil remains were excavated in France and Mongolia's Hsanda Gol Formation. Fossil occurrences indicate that the Felidae arrived in North America around 18.5 million years ago. This is about 20 million years later than the Ursidae and the Nimravidae, and about 10 million years later than the Canidae.

In the Early Miocene about 20 to 16.6 million years ago, Pseudaelurus lived in Africa. Its fossil jaws were also excavated in geological formations of Europe's Vallesian, Asia's Middle Miocene and North America's late Hemingfordian to late Barstovian epochs.

In the Early or Middle Miocene, the saber-toothed Machairodontinae evolved in Africa and migrated northwards in the Late Miocene. With their large upper canines, they were adapted to prey on large-bodied megaherbivores. Miomachairodus is the oldest known member of this subfamily. Metailurus lived in Africa and Eurasia about 8 to 6 million years ago. Several Paramachaerodus skeletons were found in Spain. Homotherium appeared in Africa, Eurasia and North America around 3.5 million years ago, and Megantereon about 3 million years ago. Smilodon lived in North and South America from about 2.5 million years ago. This subfamily became extinct in the Late Pleistocene.

Results of mitochondrial analysis indicate that the living Felidae species descended from a common ancestor, which originated in Asia in the Late Miocene epoch. They migrated to Africa, Europe and the Americas in the course of at least 10 migration waves during the past ~11 million years. Low sea levels and interglacial and glacial periods facilitated these migrations. Panthera blytheae is the oldest known pantherine cat dated to the late Messinian to early Zanclean ages about 5.95 to 4.1 million years ago. A fossil skull was excavated in 2010 in Zanda County on the Tibetan Plateau. Panthera palaeosinensis from North China probably dates to the Late Miocene or Early Pliocene. The skull of the holotype is similar to that of a lion or leopard. Panthera zdanskyi dates to the Gelasian about 2.55 to 2.16 million years ago. Several fossil skulls and jawbones were excavated in northwestern China. Panthera gombaszoegensis is the earliest known pantherine cat that lived in Europe about 1.95 to 1.77 million years ago.

Living felids fall into eight evolutionary lineages or species clades. Genotyping of the nuclear DNA of all 41 felid species revealed that hybridization between species occurred in the course of evolution within the majority of the eight lineages.

Modelling of felid coat pattern transformations revealed that nearly all patterns evolved from small spots.

History Of Species

Through fossil research, it is known that the oldest true cat (Eocat) lived in the Eocene Epoch. During the Eocene, it evolved into the false cat. False cats are thought to be the common ancestor of both extant subfamilies and the extinct subfamily Sabretooth. The group of animals better known as saber-toothed cats became extinct in the late Pleistocene, and included saber-toothed cats, saber-toothed cats, direcats, and saber-toothed cats. The first cats appeared in the Oligocene Epoch about 30 million years ago, and it was a thousand years ago that the more familiar domestic cats became related to humans. Cats originated from primitive types similar to hunting cats. The shape and sex of hunting cats are similar to today's cats and are relatively primitive. They used to be a subfamily of cats, but now they are mostly regarded as an independent hunting cat family Nimravidae.

The hunting cat family occupies a similar ecological position to the cat family and is relatively diverse. Most of the canine teeth are relatively developed. Some members, such as Eusmilus, have developed upper canine teeth similar to those of saber-toothed tigers. They were the main predators of pachyderms at that time.

After the birth of the real cat family, it developed in two directions. The upper canine teeth of one branch gradually lengthened, and the canine teeth of the other branch tended to become smaller and the body was more flexible. This branch with gradually elongated upper canine teeth is classified into the subfamily Machairodontinae, of which the late Smilodon is the representative. Sabre-toothed cats were probably the most striking of all prehistoric mammals, with huge bodies and particularly well-developed upper canine teeth. They probably fed on pachyderms and disappeared with the decline of pachyderms.

There are 36 known species of cats, all descended from a common ancestor 18 million years ago. These species originated in Asia and spread across continents via land bridges.

According to research on mitochondrial and nuclear genes published in Science by Warren Johnson and Stephen O'Brien of the National Cancer Institute, it was determined that the ancestors of cats used Beringia and the Isthmus of Panama to make Between at least 10 continent-to-continent migrations (in both directions), eight major lineages evolved.

Among them, the genus Panthera is the oldest, while the genus Felis is the youngest. They estimate that about 60 percent of living species evolved within the last million years. Most cats have 18 or 19 chromosome ploidy. Cats in the New World (Central and South America) have 18 chromosome ploidy, which may be caused by two smaller chromosomes combining to form a larger chromosome. Prior to this discovery, biologists were mostly unable to build a taxonomic tree of cats from the fossil record because the fossils of different species all looked similar, mainly due to differences in scale.

Of the 36 recognized cat species, tigers are most closely related to lions, leopards and jaguars. These big cats evolved from a common ancestor similar to modern leopards or jaguars and lived more than 5 million years ago. Fossils found in Central Asia, China, Siberia, Japan, and the Indonesian islands of Sumatra and Java clearly identify tigers as approximately two million years old.

Lions and cheetahs are only found in the wild in Africa and Asia. Wild cats are found in the savannahs and shrublands of North Africa, the Arabian Peninsula, and southwestern Asia. The cougar and lynx territory extends from Canada's Yukon Territory to South America and parts of Asia. They are named for the territory they live in, i.e. cougars in the Rockies are called mountain lions, but in Florida they would be called Florida panthers.

The most ferocious animals on land - tigers, leopards, lions, and cats raised in people's homes were originally brothers of the same race. In zoological classification, they are collectively called cats, but cats are the smallest. They have different characteristics in adapting to survival: tigers can swim, while lions cannot. In addition to swimming, leopards can also climb trees and are agile and not inferior to apes. They all mainly eat carnivores, and there is no big difference in their food intake.

All modern cats can be traced back to the ancient carnivorous felines. In the subsequent evolutionary process, they gradually differentiated into several branches, one of which was the ancient cheetah. After a long evolutionary process, it finally evolved into Today's cheetah. The ancient saber-toothed cats and the pseudo-saber-toothed cats became extinct around the Tertiary Period respectively, and only the ancient cats survived. Later, the ancient cats were divided into three branches, namely the famous dinocats, saber-toothed cats and true cats. Especially the dinocats and true saber-toothed cats gave birth to the most famous and ferocious cats on the earth. Prehistoric beasts.

However, in the subsequent development process, these two groups also became extinct during the Quaternary Ice Age. Only the true cats survived. After several differentiations, they finally formed the two major categories of cats and leopards, which we know as The prototype of the subfamily Felinae and Leopardinae among the modern cats. With the continuous development of scientific understanding, people's classification of cats has been improving and changing.

Earlier, people classified cheetahs separately based on some characteristics of the cheetah, such as its claws that cannot be freely retracted like other cats. The scientific name of the genus "Acinonyx" means "immovable claws" in Greek. It is a member of the subfamily Cheetahinae, independent of the subfamily Feline and Leopardae. Later, entering the field of molecular science, people looked at the cheetah again from the genetic level. It was found that it is very closely related to the puma and the slender cat. The three together formed a pedigree, so the cheetah subfamily was canceled, and the cheetah species It is also classified into the genus Cheetah of the subfamily Felidae.

Living Habits

hunt

The first is lions, such as African lions, cats. After they approach their prey, their first method is to bite off the prey's throat and kill the prey. The second is to jump on the back of the prey and bite off the prey's spine, thus killing the animal.

The second method is the jaguar's hunting method. It is relatively simple. It does not bite the neck. It never bites the prey's neck. It bites directly into the prey's skull. It can penetrate the prey's skull, which means it bites it thoroughly. So It is said that its upper and lower jaws are very powerful.

The third cheetah's hunting method, the cheetah's hunting method, is just to bite the animal's throat. Because its canines are relatively thin and small, it can only use this method to chase and bite the animal's throat, and then suffocate the animal to death. Another method is that of the leopard, which uses the same method as the tiger and lion. It often drags its prey to a tree and hangs it to prevent other animals from plundering.

food

Cats are very smart, that is, they will never catch potentially dangerous, very large prey. Except when this approach will bring huge benefits to it, such as when it is not very hungry, it will never provoke elephants, never provoke African buffalo, and will never provoke giraffes. When this group is indeed very short of food, and the group is very large and does not have enough food to satisfy itself, it will take great risks. Because this meal may satisfy the food of a pride of lions, it may take this risk. But generally, as long as there is potentially dangerous prey, the technique it uses is to avoid it and not catch it. But this is the case when living in groups, and many cats living alone have a natural way to avoid danger, that is, they can catch prey well and not be harmed by the prey. The most typical examples here are pumas and tigers, both of which have the ability to capture prey without being harmed.

habits

Cats are aggressive and cruel by nature. They have strong mobility in the wild. Most of them are good at climbing and jumping. They run fast and often hunt other animals in ambush. Most cats like to live alone, without a fixed nest and a nest area with a certain range of activities. It is mostly active in the morning, dusk and night, and hides in the forest during the day. Most cats are carnivorous. [twenty two]

The bobcat that lives in the Rocky Mountains of North America has tufts of hair on its ears and paws, and a short tail. These physical features can help it maintain its body temperature during the long and cold winter. The thick soft fur on its feet is like snowshoes, allowing it to It can move in snow.

The jaguar's long tail and strong limbs allow it to maintain balance when jumping and flying in the rainforest environment; whether on the ground or among the branches of trees, the spots on its body can blend into the light spots of the sun. So that it can get close to the prey without anyone noticing.

The dune cat in the Sahara Desert also has tufts of hair on its feet, which prevents it from being burned by the hot sand and allows it to move quickly on the sand without sinking. Its large ears have a large surface area, which not only helps dissipate heat, but also allows it to keenly determine the location of prey.

Leopards are another of Africa's great hunters, and the cats have evolved a knack for dragging their prey up trees after capturing it. A leopard can drag an antelope equal to its own mass between branches to avoid detection by other predators or scavengers.

The long-legged Indian leopard is the only cat that cannot retract its claws. Its claws are similar to dog's toenails, so it has amazing explosive power when it pounces on prey. After the cheetah knocks the prey to the ground, it bites the prey's throat with its powerful jaws and sharp teeth.

There are many animal species and mysterious predators living in the vast African savannah, and the African lion is one of them. They have strong muscles, elastic spines, sharp claws and teeth to catch prey. The African lion also blends in with the tawny environment in which it lives, making it difficult to detect even when close to prey.

The thick white fur and gray spots on the snow leopard's body not only protect it from hiding in the icy and snowy environment, but also keep it warm. The cat's lungs have developed to be larger, allowing it to get more oxygen in the thin air of the Himalayas, and its wide feet make it stronger when jumping, making it easier to cross Deep snow.

The Siberian tiger lives in the dense forests of northern China, and its stripes help it camouflage itself when hunting. As the predator moves through the jungle, its stripes interrupt its outline in the shadows of the trees, while its coat color also helps it camouflage at night.

This vast, rocky steppe stretching from southern Russia to China is perfect for the rare Pallas cats. Their small size and long, thick fur keep them warm in the winter and protect them from the sun in the summer. The Pallas cat has a flat head and eyes set high on the skull. This shape allows it to hide behind rocks without being discovered when looking for prey.

Protect

protection level

In the Convention on International Trade in Endangered Species of Wild Fauna and Flora, 20 species of cats, including caracals, clouded leopards, and tigers, are listed as first-level protected animals, and all other species are listed as second-level protected animals. [twenty one]

China has listed clouded leopards, leopards, tigers and snow leopards as first-level national protected animals, and lynx, prairie spotted cats, desert cats, jungle cats, rabbit cats, golden cats and fishing cats as second-level protected animals. [twenty one]

All are listed in CITES Appendix I and II protected animals of the Washington Convention.

Population status

Due to the impact of modern civilization, humans continue to develop forests and cultivate them into farmland, causing large-scale destruction of the natural ecological environment, depriving cats of the environment they need to survive, and shrinking their habitats; and in order to obtain their beautiful The furs were shipped to trading markets in various places, and crazy large-scale poaching activities were carried out, especially in some remote areas. Although this situation has aroused strong opposition from relevant departments and wildlife experts, poaching and smuggling activities have not been effectively stopped. As a result, cat populations in the wild declined sharply after the 20th century. In the Convention on International Trade in Endangered Species of Wild Fauna and Flora, all wild cats are listed in Appendix I and II. In addition, the governments of the countries where cats originate have also established relevant laws and protected areas to protect cats in various places.