▪ extinct mammal
      extinct group of hoofed mammals (mammal) found as fossils (fossil), mostly in South America, although the oldest forms seem to have originated in East Asia. Notoungulates lived from the late Paleocene Epoch (about 57 million years ago) to the beginning of the Pleistocene Epoch (about 1.8 million years ago) and were most diverse during the Miocene Epoch (23–5.3 million years ago). By the Pliocene Epoch (5.3–1.8 million years ago) their numbers and diversity were reduced, perhaps owing to changes in climate and geography. In South America, notoungulates evolved and diversified in isolation; they became extinct after the land connection between North and South America was reestablished about 3.5 million years ago.

      In their time, the notoungulates included a variety of hoofed animals whose development paralleled the evolution of more-advanced forms elsewhere. One group, the toxodonts (Toxodon), was clumsily built and rather massive; Toxodon stood about 1.5 metres (5 feet) high at the shoulder. Other notoungulates developed along lines similar to rabbits (rabbit) and rodents (rodent).

* * *

Universalium. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Notoungulata — Toxodon, Lebendrekonstruktion Zeitraum oberes Paläozän bis Pleistozän 55 Mio. Jahre bis 10.000 Jahre Fundorte Südamerika …   Deutsch Wikipedia

  • Notoungulata — Temporal range: Paleocene–Pleistocene …   Wikipedia

  • Notoungulata — Nesodon imbri …   Wikipédia en Français

  • Notoungulata —   Notoungulados Rango temporal: Paleoceno Pleistoceno …   Wikipedia Español

  • notoungulata — no·to·ungulata …   English syllables

  • notoungulata — ˌnōd.ˌō+ noun plural Usage: capitalized Etymology: New Latin, from not (II) + Ungulata : an order of extinct New World herbivorous mammals widely distributed in So. America from the Paleocene to the Pleistocene …   Useful english dictionary

  • Нотоунгуляты — (Notoungulata)         отряд ископаемых млекопитающих. Близки к копытным (См. Копытные), поэтому их называют южноамериканскими копытными. Жили в палеогене плейстоцене. Некоторые Н. (типотерии) сочетали признаки копытных и грызунов, другие… …   Большая советская энциклопедия

  • Mesotheriidae —   Mesotheriidae Rango temporal: Eoceno Pleistoceno …   Wikipedia Español

  • Mesotheriidae — Temporal range: Late Eocene–Middle Pleistocene …   Wikipedia

  • Meridiungulata —   Meridiungulata Thomashuxleya …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”