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It was theorized that positive selection for shovel-shaped incisors over the spatulate incisors is more commonly found within cultures that used their teeth as tools due to a greater structural strength in increased shovel-shaped incisors. [2] In some instances, incisors can present a more pronounced version of this called double shovel-shaped.
Like all shrews, the Asian house shrew is plantigrade and long-nosed. The teeth are a series of sharp points to poke holes in insect exoskeletons . It is the largest of the shrew species, weighing between 50 and 100 g and being about 15 cm long from snout to tip of the tail.
Sinodonty is a particular pattern of teeth characterized by the following features: The upper first incisors and upper second incisors are shovel-shaped, and they are "not aligned with the other teeth". [11] The upper first premolar has one root, and the lower first molar in Sinodonts has three roots (3RM1). [11] [5]
The incisor teeth of colugos are highly distinctive; ... Colugos are shy, nocturnal, solitary animals found in the tropical forests of Southeast Asia. Consequently ...
There are two subspecies: the Chinese water deer (H. i. inermis) and the Korean water deer (H. i. argyropus).The water deer is superficially more similar to a musk deer than a true deer; despite anatomical peculiarities, including a pair of prominent tusks (downward-pointing canine teeth) and its lack of antlers, it is classified as a cervid.
The animal is found solitary, in pairs, or in small family groups [1] in open grassland and forests at an elevation of about 1,000 metres (3,300 ft), [19] and uses caves to rest in. [25] It prefers temperate deciduous forest, but also lives in broad-leaved or subalpine coniferous forest [1] made up of Japanese beech, Japanese oak, [32] alpine ...
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Japanese weasels investigate holes and cracks to hunt out smaller prey. Small prey such as mice are hunted by pierces to the brain and neck with their teeth and are also carried by the neck. Japanese weasels are prey to some larger animals. Foxes, martens, preying birds and domestic cats hunt Japanese weasels and pose a threat to their life. [5]