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Canine sexual dimorphism is one particular type of sexual dimorphism, in which males of a species have larger canines than females. Within primates, the male and female canine tooth size varies among different taxonomic subgroups, yet canine dimorphism is most extensively found in catarrhines among haplorhine primates.
The mountain gorilla also has the thickest hair. The western lowland gorilla can be brown or greyish with a reddish forehead. ... Silverbacks have large canine teeth ...
Additionally, adult males have sharp canine teeth. Like all great apes, it has a dental formula of 2.1.2.3 2.1.2.3, that is, two incisors, one canine, two premolars, and three molars on both halves of each jaw. Chimpanzees lack the prominent sagittal crest and associated head and neck musculature of gorillas. [14] [41]
The toothcomb of most lemuriforms includes six finely spaced teeth, four incisors and two canine teeth that are procumbent (tilt forward) in the front of the mouth. [4] [15] The procumbent lower canine teeth are the same shape as the incisors located between them, [15] but they are more robust and curve upward and inward, more so than the incisors. [13]
Fossils show Ardipithecus to have canine teeth that were reduced, much like later hominids. The jaw of Ardipithecus was very much prognathic. [6] The teeth of Ardipithecus ramidus in particular showed that the species was probably an omnivore. The upper canines are less sharp than a chimpanzee’s, possibly due to them being smaller in general. [6]
Primates usually have dimorphism in body mass [82] [83] and canine tooth size [84] [85] along with pelage and skin color. [86] The dimorphism can be attributed to and affected by different factors, including mating system , [ 87 ] size, [ 87 ] habitat and diet.
Post canine enlargement has also been significantly positively correlated with basal metabolic rate, independently of body size. [21] Larger primates tend to need larger teeth to process more food to meet the energy requirements of a larger body, [22] but the evolution of postcanine megadontia is more likely due to the quality of the diet. The ...
The teeth, both in absolute size and relative proportions, are the same as in gorillas, and the molars range in size between the largest and smallest of what is normally seen in adult gorillas. Like in gorillas, the upper molars have a long protocone crest, and the lower molars have a correspondingly long trigonid crest, which increase shearing ...