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Hace 2 días · A mammal (from Latin mamma 'breast') is a vertebrate animal of the class Mammalia (/ m ə ˈ m eɪ l i. ə /). Mammals are characterized by the presence of milk-producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
Hace 6 días · mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother. In addition to these characteristic milk glands, mammals are distinguished by several other unique features.
- An animal is considered a mammal if it can produce milk. Other features unique to mammals include hair or fur (chemically different from hairlike s...
- It is estimated that there are more than 5,500 living mammal species. Mammals are incredibly diverse and can be found in every major habitat.
- The biggest living mammal—indeed, the largest animal ever—is the blue whale. It can be as heavy as 180 metric tons (200 short tons) and reach a len...
- According to fossil records, mammals have existed since the Triassic Period, alongside early dinosaurs such as Riojasaurus and Saltopus. True mamma...
- Mammals evolved from a group of reptiles called therapsids, which lived from 299 million to 200 million years ago. Therapsids were quadrupedal and...
- The platypus has many features not found in other mammals. It is part of a group of mammals known as monotremes, which lay eggs and have specialize...
Hace 2 días · The lion ( Panthera leo) is a large cat of the genus Panthera, native to Africa and India. It has a muscular, broad-chested body; a short, rounded head; round ears; and a hairy tuft at the end of its tail. It is sexually dimorphic; adult male lions are larger than females and have a prominent mane.
19 de jun. de 2024 · Marsupials are a diverse group of mammals belonging to the infraclass Marsupialia. They are natively found in Australasia, Wallacea, and the Americas.
Hace 2 días · This article is about a marine mammal. For other uses, see Whale (disambiguation). "Whales" redirects here. Not to be confused with Wales. Whales are a widely distributed and diverse group of fully aquatic placental marine mammals.
Hace 6 días · Castorocauda weighed 500 to 800 grams (1.1 to 1.8 pounds) and was almost as large as living platypuses, making it the largest Jurassic mammal known. (more) The higher classification of the class Mammalia is based on consideration of a broad array of characters.
Hace 2 días · Most paleontologists, however, still think that animals with the dentary-squamosal jaw joint and the sort of molars characteristic of modern mammals should formally be members of Mammalia. [8] Where the ambiguity in the term "mammal" may be confusing, this article uses "mammaliaform" and "crown mammal".
