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2. List of perissodactyls - Wikipedia

   en.wikipedia.org/wiki/List_of_perissodactyls

   Perissodactyla is an order of placental mammals composed of odd-toed ungulates – hooved animals which bear weight on one or three of their five toes with the other toes either present, absent, vestigial, or pointing backwards. Members of this order are called perissodactyls, and include rhinoceroses, tapirs, and horses.

3. List of artiodactyls - Wikipedia

   en.wikipedia.org/wiki/List_of_artiodactyls

   Artiodactyla is an order of placental mammals composed of even-toed ungulates – hooved animals which bear weight equally on two of their five toes with the other toes either present, absent, vestigial, or pointing posteriorly – as well as their descendants, the aquatic cetaceans. Members of this order are called artiodactyls.

4. Opabinia - Wikipedia

   en.wikipedia.org/wiki/Opabinia

   Opabinia regalis is an extinct, stem group arthropod found in the Middle Cambrian Burgess Shale Lagerstätte (505 million years ago) of British Columbia. [1] Opabinia was a soft-bodied animal, measuring up to 7 cm in body length, and its segmented trunk had flaps along the sides and a fan-shaped tail. The head shows unusual features: five eyes ...

5. Artiodactyl - Wikipedia

   en.wikipedia.org/wiki/Artiodactyl

   Size varies considerably; the smallest member, the mouse deer, often reaches a body length of only 45 centimeters (18 in) and a weight of 1.5 kilograms (3.3 lb). The largest member, the hippopotamus, can grow up to 5 meters (16 ft) in length and weigh 4.5 metric tons (5 short tons), and the giraffe can grow to be 5.5 meters (18 ft) tall and 4.7 ...

6. Animals in ancient Greece and Rome - Wikipedia

   en.wikipedia.org/wiki/Animals_in_ancient_Greece...

   Animals had a variety of roles and functions in ancient Greece and Rome. Fish and birds were served as food. Species such as donkeys and horses served as work animals. The military used elephants. It was common to keep animals such as parrots, cats, or dogs as pets. Many animals held important places in the Graeco-Roman religion or culture.

7. List of animals by number of legs - Wikipedia

   en.wikipedia.org/wiki/List_of_animals_by_number...

   [2] [3] [4] Animals have been selected so that each number from 0 to 55 leg pairs has one example listed. Each of these examples is listed by a number closely associated with the relevant taxon, either because that number is the one most commonly observed in that taxon or because it is one of only a few numbers recorded for the taxon.

8. Evolution of cetaceans - Wikipedia

   en.wikipedia.org/wiki/Evolution_of_cetaceans

   The evolution of cetaceans is thought to have begun in the Indian subcontinent from even-toed ungulates (Artiodactyla) 50 million years ago (mya) and to have proceeded over a period of at least 15 million years. [2] Cetaceans are fully aquatic mammals belonging to the order Artiodactyla and branched off from other artiodactyls around 50 mya.

9. History of Animals - Wikipedia

   en.wikipedia.org/wiki/History_of_Animals

   History of Animals (Greek: Τῶν περὶ τὰ ζῷα ἱστοριῶν, Ton peri ta zoia historion, "Inquiries on Animals"; Latin: Historia Animalium, "History of Animals") is one of the major texts on biology by the ancient Greek philosopher Aristotle, who had studied at Plato's Academy in Athens. It was written in the fourth century BC ...