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Carnivora

dnaoodb: professional biology database , biology encyclopedia

In biological classification, Carnivora ( / k ɑːr ˈ n ɪ v ər ə /) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. Carnivora  is an order of placental mammals that have specialized in primarily eating flesh, whose members are formally referred to as carnivorans. The order Carnivora is the fifth largest order of mammals, comprising at least 279 species.

The teeth of the carnivora are sharp and powerful, with carnivorous teeth (cleft teeth), that is, the last premolar in the upper jaw and the first molar in the lower jaw. The two large cusps of the upper cleft teeth and the two outer cusps of the lower cleft teeth are in a semi-oblique position when they bite, and the more they bite, the tighter they are like scissors, which can cut ligaments and cartilage. The canine teeth are unusually thick, long and pointed, quite sharp, and play a role in piercing.

Scientific classification

Alias:
Carnivora
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordate
Subphylum:
Subphylum Vertebrata
Class:
Mammalia
Subclass:
Eutheria
Order:
Carnivora
Superorder:
Laurasiatheria

Definition

Commonly known as beasts or carnivores. The teeth are sharp and powerful, with carnivorous teeth (cracked teeth), that is, the last premolar in the upper jaw and the first molar in the lower jaw. The two large cusps of the upper cleft teeth and the two outer cusps of the lower cleft teeth act like a guillotine when they bite together, which can cut off ligaments and cartilage. The large teeth are extremely thick, long and pointed, quite sharp, and play a role in piercing.

Feature

There are 89 genera and 250 species of Carnivora in 8 families. Commonly known as beasts, carnivores. Teeth are sharp and powerful, with upper fourth premolars and lower first molars forming a cleft. The two large cusps of the upper cleft teeth and the two outer cusps of the lower cleft teeth act like a guillotine when they bite together, cutting off ligaments and cartilage. The large teeth are extremely thick, long and pointed, quite sharp, and play a role in piercing. The superior sagittal crest of the skull is tall, the temporal fossa and the coronoid process of the mandible are large to accommodate the strong temporal muscle, with bony earbuds, the mandibular articular process is low, the limbs are flexible, the ulna and radius are separated, the scaphoid and lunate in the carpal bone Often fused with capitate, 4 or 5 toes, with sharp claws at the end. The classification above the family is mainly based on the structure of the base of the skull, especially near the ear area. Aquatic carnivores are extremely specialized in form, with streamlined bodies, paddle-shaped limbs, and homogeneous teeth that tend to disappear. Quick response, sensitive action, accurate, strong and powerful. All have developed brains and sensory organs, and the senses of smell, vision and hearing are relatively developed. The carnivorous body is strong and muscular, and the toes of the limbs have sharp claws to facilitate the capture of prey.

Life Habits

Lifestyle is predatory.

Most carnivores have a vigorous body, with sharp claws on the toes of their limbs to facilitate catching prey. The way of life is predatory, and the prey are mostly ungulates, various rodents, birds and some large insects. There are many ways to hunt and kill, such as hiding in the main road and waiting, or sniffing and tracking, lurking and approaching, and using sharp teeth and claws as weapons to carry out surprise attacks. Another attack method is long-distance pursuit and hunting. Animals such as wolves and jackals have developed a hunting method similar to collective division of labor. Cats and ferrets are typical carnivores with meat as the main food; dogs and civets follow, including some plant fruits in addition to meat; bears and raccoons eat more plant food, which is close to omnivorous The predation results of hyenas are often robbed by lions and need to be supplemented with carrion, while hyenas eat ants as their main food; giant pandas are also omnivores, with young bamboo and bamboo shoots as their main food, and they will prey on other wild animals and eat some fruits. The vast majority of carnivores live alone, and each adult often occupies a certain area of activity area, which serves as a hunting area for hunting alone, and tries to guard its own "territory". Many species have well-developed secretory glands, and the secretions of North American skunks have a strong smell, which can make people faint for a while. Some species have more developed secretory glands, which are not only weapons of self-defense, but also means of communication and marking fields. Many day and nocturnal.