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P. primaevus, closeup of skull.. Phenacodus intermedius reached 10 to 39 kg (22 to 86 lb), while P. trilobatus is estimated at 22 to 87 kg (49 to 192 lb). [3] The typical Phenacodus primaevus was a relatively small ungulate about 1.5 m (4 ft 11 in) long and weighed up to 56 kg (123 lb), of slight build, with straight limbs each terminating in five complete toes, and walking in the digitigrade ...
The proboscis of the tapir is a highly flexible organ, able to move in all directions, allowing the animals to grab foliage that would otherwise be out of reach. Tapirs often exhibit the flehmen response, a posture in which they raise their snouts and show their teeth to
Piglets are born with erupted teeth, in order to avoid sow teat injury and damage between piglets, some farms clip their deciduous teeth. [1] Lesions caused by piglet teeth are superficial and mortality is lower among pigs that don't undergo painful procedures, including teeth clipping.
The four lower incisors are deeply grooved "comb teeth". A diastema occurs between the incisors and the cheek teeth. The permanent dental formula for hyraxes is 1.0.4.3 2.0.3-4.3 [8] although sometimes stated as 1.1.4.3 2.1.4.3 [9] because the deciduous canine teeth are occasionally retained into early adulthood. [8]
The main axes of both the front and rear feet pass through the third toe, which is always the largest. The remaining toes have been reduced in size to varying degrees. Tapirs, which are adapted to walking on soft ground, have four toes on their fore feet and three on their hind feet. Living rhinos have three toes on both the front and hind feet.
Birds are generally digitigrade animals (toe-walkers), [7] [10] which affects the structure of their leg skeleton. They use only their hindlimbs to walk . [2] Their forelimbs evolved to become wings. Most bones of the avian foot (excluding toes) are fused together or with other bones, having changed their function over time.
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The inside of the fourth upper pre-molar closely passes by the outer surface of the first lower molar, thus allowing the sharp cusps of the carnassial teeth to slice through meat. The length and size of the carnassial teeth vary between species, taking into account factors such as: [19] the size of the carnivorous animal