Coryphodon

Coryphodon
Coryphodon
Temporal range: Late Paleocene–Early Eocene
Coryphodon hamatus skeleton
Conservation status
Fossil
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Cimolesta
Suborder: Pantodonta
Family: †Coryphodontidae
Genus: Coryphodon
Owen, 1845
Species
  • C. eocaenus
  • C. dabuensis
  • C. lobatus
  • C. oweni
  • C. proterus
  • C. ryani

Coryphodon (meaning peaked tooth) is an extinct genus of mammal. It was widespread in North America between 59 and 51 million years ago. It is regarded as the ancestor of the genus Hypercoryphodon of Mid Eocene Mongolia.

Restoration by Charles R. Knight
Restoration by Heinrich Harder

Coryphodon was a pantodont, a member of the world's first group of large browsing mammals. It migrated across what is now northern North America, replacing Barylambda, an earlier pantodont. At about 1 metre (3.3 ft) at shoulder height and 2.25 metres (7.4 ft) in body length, Coryphodon was the biggest known mammal of its time. It had a semi-aquatic lifestyle, likely living in swamps and marshes like a hippopotamus, although it was not closely related to modern hippos or any other animal known today.[1]

Fossils found on Ellesmere Island, near Greenland, show that Coryphodon once lived there in warm swamp forests of huge trees, similar to the modern cypress swamps of the American South. Though the climate of the Eocene was much warmer than today, plants and animals living north of the Arctic Circle still experienced months of complete darkness and 24-hour summer days. Chemical studies of fossil bone show that in the summer, Coryphodon ate flowers, leaves, and swamp plants. In the winter dark, they survived on pine needles, dead leaves, and fungi. This flexible diet allowed the species to spread widely across the Eocene world. [2]

Coryphodon had very strong neck muscles and short tusks that were probably used to uproot swamp plants. As in most pantodonts, the tusks were larger in males. The creature was very slow, with long upper limbs and short lower limbs, which were needed to support its weight. Coryphodon had one of the smallest brain/body ratios of any mammal, living or extinct, possessing a brain weighing just 90 grams (3.2 oz) and a body weight of around 500 kilograms (1,100 lb).[1]

References

  1. ^ a b Palmer, D., ed (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 235. ISBN 1-84028-152-9. 
  2. ^ Template:Http://www.biology-blog.com/blogs/permalinks/6-2009/coryphodon.html

Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Coryphodon — Zwei Coryphodon Zeitraum Paläozän bis Eozän 59 bis 51 Mio. Jahre Fundorte Grönland …   Deutsch Wikipedia

  • Coryphodon — Saltar a navegación, búsqueda ? Coryphodon Rango fósil: Paleoceno reciente a Plioceno medio …   Wikipedia Español

  • Coryphodon — Co*ryph o*don (k? r?f ? d?n), n. [Gr. koryfh head, peak + odoy s, odo ntos, tooth.] (Paleon.) A genus of extinct mammals from the eocene tertiary of Europe and America. Its species varied in size between the tapir and rhinoceros, and were allied… …   The Collaborative International Dictionary of English

  • Coryphodon — Owen, fossile Gattung der Amblypoden (s. Huftiere), den Dinoceraten am nächsten verwandt, umfaßt Arten von der Größe des Tapirs bis zu der eines Stieres, mit kurzen, plumpen Beinen und auffallend kleinem Gehirn. Sie finden sich zahlreich im… …   Meyers Großes Konversations-Lexikon

  • coryphodon — /keuh rif euh don /, n. Paleontol. a primitive hoofed mammal of the extinct genus Coryphodon, of the early Eocene Epoch, having a long, thickset body, short legs, and five toed feet, each toe ending in a small hoof. [1845; < NL < Gk koryph(é)… …   Universalium

  • coryphodon — co·ryph·o·don …   English syllables

  • coryphodon — …   Useful english dictionary

  • Корифодон — У этого термина существуют и другие значения, см. Корифодон (змея). ? † Корифодон …   Википедия

  • Amblypoda — is a taxonomic hypothesis uniting a group of extinct, herbivorous mammals. They were considered a suborder of the primitive ungulate mammals, and have since been shown to represent a polyphyletic group.CharacteristicsThe Amblypoda take their name …   Wikipedia

  • Третичная система* — (кайнозойская) располагается над меловой и предшествует современному периоду. ТРЕТИЧНАЯ СИСТЕМА Органический мир ее характеризуется исчезновением многих выдающихся мезозойских типов. Флора отличается развитием цветковых растений. Среди… …   Энциклопедический словарь Ф.А. Брокгауза и И.А. Ефрона

Share the article and excerpts

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