Turtle | Species, Classification, & Facts | Britannica
2024年10月11日 · Turtles are reptiles of the order Testudines that have bodies encased in bony shells. There are more than 350 species of turtles.
Habitats, diets, and characteristics of turtles | Britannica
turtle, Any of approximately 300 species (order Testudines) of reptiles that have a bony shell overlaid with horny shields and are found in most parts of the world. Turtles have existed for 200 million years, making them the oldest of all surviving reptiles.
Turtle - Reptile, Classification, Adaptations | Britannica
2024年10月11日 · Turtle - Reptile, Classification, Adaptations: The title of the turtle order was formerly Testudinata, although the term Chelonia was also regularly used. Order Testudines comprises two suborders, Cryptodira with 263 species in 11 families and Pleurodira with 93 species in 3 families.
What’s the Difference Between a Turtle and a Tortoise?
Well, actually, there’s a meaningful difference between tortoises and other turtles. All tortoises are in fact turtles—that is, they belong to the order Testudines or Chelonia, reptiles having bodies encased in a bony shell—but not all turtles are tortoises.
Turtle - Adaptations, Habitats, Lifespan | Britannica
2024年10月11日 · Turtle - Adaptations, Habitats, Lifespan: Turtles have adapted to a remarkable variety of environments, but the greatest number of species occurs in southeastern North America and South Asia. They are not social animals.
Turtle - Evolution, Adaptation, Conservation | Britannica
2024年10月11日 · Turtle - Evolution, Adaptation, Conservation: The earliest turtles known date to the Late Permian Epoch. Many of the oldest and most primitive forms lacked a shell, plastron, and a carapace. The oldest sea turtle is known from the mid-Cretaceous.
Reptile | Definition, Characteristics, Examples, & Facts | Britannica
2 天之前 · The major groups of living reptiles—the turtles (order Testudines), tuatara (order Rhynchocephalia [Sphenodontida]), lizards and snakes (order Squamata), and crocodiles (order Crocodylia, or Crocodilia)—account for over 8,700 species.
list of turtles - Encyclopedia Britannica
Turtles (order Testudines), including tortoises, are reptiles with bodies encased in bony shells. This is a list of turtles, ordered alphabetically and grouped by habitat. aquatic
Turtle - Egg-laying, Lifespan, Adaptations | Britannica
2024年10月11日 · Turtle - Egg-laying, Lifespan, Adaptations: All turtles lay their eggs on land, and none show parental care. The age at which turtles first reproduce varies from only a few years to perhaps as many as 50.
Characteristics and features of reptiles | Britannica
Living reptiles include the scaly reptiles (snakes and lizards; order Squamata), the crocodiles (Crocodylia), the turtles (Testudines), and the unique tuatara (Sphenodontida). Being cold-blooded, reptiles are not found in very cold regions; in …