Three Ways To Be a Saber-Toothed Cat

  title={Three Ways To Be a Saber-Toothed Cat},
  author={L. D. Martin and J. P. Babiarz and Virginia Naples and Jonena M. Hearst},
Abstract Saber-toothed carnivores, until now, have been divided into two groups: scimitar-toothed cats with shorter, coarsely serrated canines coupled with long legs for fast running, and dirk-toothed cats with more elongate, finely serrated canines coupled to short legs built for power rather than speed. In the Pleistocene of North America, as in Europe, the scimitar-cat was Homotherium; the North American dirk-tooth was Smilodon. We now describe a new sabercat from the Early Pleistocene of… 
An eye for a tooth: Thylacosmilus was not a marsupial “saber-tooth predator”
The results indicate that despite its impressive canines, the Thylacosmilus atrox was not the ecological analogue of placental saber-tooth, and likely did not use its canines to dispatch its prey.
Comparative Biomechanical Modeling of Metatherian and Placental Saber-Tooths: A Different Kind of Bite for an Extreme Pouched Predator
A three-dimensional computational approach is applied to examine convergence in mechanical performance between the Smilodon fatalis and Thylacosmilus atrox and finds that, in many respects, the placental S. fatalis was more similar to the metatherian T. atrox than to a conical-toothed cat.
Distinct Predatory Behaviors in Scimitar- and Dirk-Toothed Sabertooth Cats
The killing repertoire of sabertooths is investigated using a comparative sample of living carnivores and a new quantitative approach to the analysis of skull function to highlight the degree of ecological specialization among members of the large carnivore guild during the Late Pleistocene of North America.
Is the extant southern short-tailed opossum a pigmy sabretooth predator?
The South American short-tailed opossum Monodelphis dimidiata is proposed as a living analogue of extinct sabretooth predators and morphological analysis shows that M. dimidiata not only has relatively the largest canines among extant marsupial carnivores, but they are also within the range of those of sabretoot predators.
Comparative bite forces and canine bending strength in feline and sabretooth felids: implications for predatory ecology
Ass assessments of the estimated force output from the jaw adductor muscles, based on estimates of muscle cross-sectional areas and force vectors, along with canine bending strengths, in a variety of sabretooth felids, in comparison with extant felids show support for the suggestion that large sabretoothed felids hunted large prey with a canine shearing bite.
Killing Behavior in Smilodon Fatalis (Mammalia, Carnivora, Felidae) based on Functional Anatomy and Body Proportions of the Front- and Hind Limbs
Limband skull proportions of the extinct cat Smilodon fatalis were compared with those of six extant species of large felids and those of Canis lupus, and cats can accurately be distinguished into three different categories upon these ratios (even across taxonomic boundaries).
New Saber-Toothed Cat Records (Felidae: Machairodontinae) for the Pleistocene of Venezuela, and the Great American Biotic Interchange
ABSTRACT The Machairodontinae fossil record in South America is not very diverse. Until now, only the genus Smilodon (Smilodontini) has been reported, with likely a single species, S. populator. A
Using a Novel Absolute Ontogenetic Age Determination Technique to Calculate the Timing of Tooth Eruption in the Saber-Toothed Cat, Smilodon fatalis
This technique for absolute ontogenetic age determination can be replicated in other ancient species, including non-saber-toothed taxa, as long as the timing of growth initiation and growth rate can be determined for a specific feature, such as a tooth, and that growth period overlaps with the development of the other features under investigation.
Morphological convergence of the prey-killing arsenal of sabertooth predators
Results indicate that sabertooth morphs with longer, thinner canines show more robust limb proportions, and indicate a positive functional relationship between saber elongation and increased forelimb robustness, which suggests that saber carnivorans demonstrated niche partitioning of predation strategies according to canine shape and correspondingForelimb morphology.
Muscle maps for selected hind limb bones of a saber-tooth tiger
It was found from the completed muscle maps and documented research that there seemed to be closer similarities between the clouded leopard and Smilodon, thus making them appear to be a more closely related species.


Functional Morphology and the Evolution of Cats
Three basic morpho types are proposed for cats on the basis of their upper canines: conical-toothed cats with short, unserrated canines having a round cross-section; scimitar-tooting cats having short, broad canines; and dirk­ toothed cats having long, slender canines which usually have fine serrations.