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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. Trogloxene - Wikipedia

   en.wikipedia.org/wiki/Trogloxene

   Trogloxene. Trogloxenes or subtroglophiles, also called cave guests, are animal species which periodically live in underground habitats such as caves or at the very entrance, but cannot live exclusively in such habitats. [1][2] Among many scientists, trogloxenes and subtroglophile have slightly different but closely related meanings, with the ...

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. 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.

7. Limbless vertebrate - Wikipedia

   en.wikipedia.org/wiki/Limbless_vertebrate

   Limbless vertebrate. Many vertebrates are limbless, limb-reduced, or apodous, with a body plan consisting of a head and vertebral column, but no adjoining limbs such as legs or fins. Jawless fish are limbless but may have preceded the evolution of vertebrate limbs, whereas numerous reptile and amphibian lineages – and some eels and eel-like ...

8. 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.

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 ...