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Há 1 dia · Snakes are elongated, limbless, carnivorous reptiles of the suborder Serpentes ( / sɜːrˈpɛntiːz / ). [2] Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than ...
Há 5 dias · rabbit, any of 29 species of long-eared mammals belonging to the family Leporidae, excluding hares (genus Lepus ). New World cottontail rabbits are classified in the genus Sylvilagus. Frequently the terms rabbit and hare are used interchangeably, a practice that can cause confusion. Jackrabbits, for instance, are actually hares, whereas the ...
Há 5 dias · Embryonic diapause also occurs in other vertebrate species, including fish, reptiles, and some mammals, but killifish diapause is remarkably extreme because it lasts for such an extended period (8 ...
Há 1 dia · Hatteria. (Gray, 1842) (rejected name) Rhynchocephalus. ( Owen, 1845) (rejected name) The tuatara ( Sphenodon punctatus) is a species of reptile endemic to New Zealand. Despite its close resemblance to lizards, it is part of a distinct lineage, the order Rhynchocephalia. [8] The name tuatara is derived from the Māori language and means "peaks ...
Há 4 dias · Jellyfish, any planktonic marine member of the class Scyphozoa (phylum Cnidaria), a group of invertebrate animals composed of about 200 described species, or of the class Cubozoa (approximately 20 species). Learn more about the characteristics and natural history of jellyfish in this article.
Há 4 dias · Greenland shark, (Somniosus microcephalus), member of the sleeper shark family Somniosidae (order Squaliformes, which also includes the dogfish family, Squalidae) that is the longest-living vertebrate known. The species is primarily found in the cold-water environments of the Arctic Ocean and North Atlantic, from Baffin Bay eastward to the ...
Há 4 dias · Although the same basic components are present in all vertebrate brains, some branches of vertebrate evolution have led to substantial distortions of brain geometry, especially in the forebrain area. The brain of a shark shows the basic components in a straightforward way, but in teleost fishes (the great majority of existing fish species), the forebrain has become "everted", like a sock ...
