World Library  
Flag as Inappropriate
Email this Article
 

Machairodus

Machairodus
Temporal range: Late Miocene
Є
O
S
D
C
P
T
J
K
Pg
N
M. aphanistus skull
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Suborder: Feliformia
Family: Felidae
Subfamily: Machairodontinae
Tribe: Machairodontini
Genus: Machairodus
Kaup, 1833
Type species
Machairodus aphanistus
Kaup, 1832
Species
  • M. aphanistus Kaup, 1832
  • M. kurteni Sotnikova, 1991[1]
  • M. robinsoni Kurtén, 1975
  • M. kabir Peigné, 2005[2] M. horribilis
  • Schlosser, 1903

Machairodus is a genus of large machairodontine saber-toothed cats that lived in Europe, Asia, Africa and North America during the late Miocene.

Description

Early restoration by Lancelot Speed from 1905 depicting Machairodus with tiger-like markings

"Nimravides" catacopis stood about 1 m at the shoulder. Machairodus coloradensis was apparently significantly larger, about 1.2 m at the shoulder, according to skeletal and life reconstructions.[3] If accurate, this would make M. coloradensis one of the largest felids.

The skull of Machairodus was noticeably narrow compared with the skulls of modern pantherine big cats, and the orbits were relatively small. The canines were long, thin and flattened from side to side but broad from front to back like the blade of a knife, as in Homotherium. The front and back edges of the canines were serrated when they first grew, but these serrations were worn down in the first few years of the animal's life.

Machairodus was about 2 metres long and probably hunted as an ambush predator. Its legs were too short to sustain a long chase, so it most likely was a good jumper, and used its canines to cut open the throat of its prey. Its teeth were rooted to its mouth and were not too delicate, unlike most saber-toothed cats of the time, which had extremely long canines which hung out of their mouths. The fangs of Machairodus, however, were able to more easily fit in its mouth comfortably while being long and effective for hunting.[4]

Classification

The fossil species assigned to the genus Machairodus were divided by Turner into two grades of evolutionary development - M. aphanistus and the North American "Nimravides" catacopis representing the more primitive grade, and M. coloradensis and M. giganteus representing the more derived grade.[3] The characteristics of the more advanced grade include a relative elongation of the forearm and a shortening of the lumbar region of the spine to resemble that in living pantherine cats.[3] These trends would be taken further in Homotherium, which is thought to have evolved from Machairodus.

References

  1. ^ Sotnikova, M. V. "A new species of Machairodus from the late Miocene Kalmakpai locality in eastern Kazakhstan (USSR)." Annales Zoologici Fennici. Finnish Zoological Publishing Board, formed by the Finnish Academy of Sciences, Societas Biologica Fennica Vanamo, Societas pro Fauna et Flora Fennica, and Societas Scientiarum Fennica, 1991.
  2. ^ Peigné, Stéphane, et al. "A new machairodontine (Carnivora, Felidae) from the Late Miocene hominid locality of TM 266, Toros-Menalla, Chad." Comptes Rendus Palevol 4.3 (2005): 243-253.
  3. ^ a b c Turner, Alan; Antón, Mauricio (1997-04-15). The Big Cats and Their Fossil Relatives.  
  4. ^ Legendre, S.; Roth, C. (1988). "Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia)". Historical Biology 1 (1): 85–98.  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.