Rodentia Sentence Examples
It typifies not only the genus Chinchilla, but the family Chinchillidae, for the distinctive features of which see RODENTIA.
For the characteristics of the family Sciuridae and the different squirrel-like genera by which it is represented, see Rodentia.
The essential characteristic of the Cricetines is to be found in the upper cheek-teeth, which (as shown in the figure of those of Cricetus in the article RODENTIA) have their cusps arranged in two longitudinal rows separated by a groove.
Capybaras belong to the family Caviidae, the leading characteristics of which are given in Rodentia.
On these grounds, while admitting that they are allied to the rodents, it has been pointed out that they can scarcely be included in the Rodentia, and the order Proglires has in consequence been proposed for their reception.Advertisement
For the distinctive characteristics of the family Muridae and the genus Mus, to which true rats and true mice alike belong, see Rodentia.
Of the Rodentia the most interesting and conspicuous is the marmot (Arctomys marmota), which lives in colonies close to the snow-line.
We are dependent upon the Carnivora, Rodentia, Ungulata and Marsupialia for our supplies of furs, the first two classes being by far of the greatest importance.
The Carnivora include bears, wolverines, wolves, raccoons, foxes, sables, martens, skunks, kolinskis, fitch, fishers, ermines, cats, sea otters, fur seals, hair seals, lions, tigers, leopards, lynxes, jackals, &c. The Rodentia include beavers, nutrias, musk-rats or musquash, marmots, hamsters, chinchillas, hares, rabbits, squirrels, &c. The Ungulata include Persian, Astrachan, Crimean, Chinese and Tibet lambs, mouflon, guanaco, goats, ponies, &c. The Marsupialia include opossums, wallabies and kangaroos.
The finest and closest wools are possessed by the amphibious Carnivora and Rodentia, viz.Advertisement
Although the British representatives of this group should undoubtedly retain their vernacular designations of water-rat and short-tailed field-mouse, the term "vole" is one of great convenience in zoology as a general one for all the members of the group. Systematically voles are classed in the mammalian order Rodentia, in which they constitute the typical section of the subfamily Microtinae in the Muridae, or mouse-group. As a group, voles are characterized by being more heavily built than rats and mice, and by their less brisk movements.
Whether the extinct Tillodontia are most nearly allied to the Rodentia, the Carnivora or the Ungulata, and whether they are really entitled to constitute an ordinal group by themselves, must remain for the present open questions.
The Rodentia have a wider geographical range than any other order of terrestrial mammals, being, as already mentioned, represented by numerous members of the mouse-tribe (Muridae) even in Australasia.
The species without a parachute constitutes the genus Zenkerella, and looks very like an ordinary squirrel (see Rodentia).
Several of them, such as Echinomys and Loncheres, are rat-like creatures with spiny or bristly fur (see Rodentia) .Advertisement
A pair of prairie burrowing owls (Speotyto) are almost invariably inhabitants of a viscachera (see RODENTIA).
These indicate unusual capacity for crushing or grinding; while the last premolar is a crushing implement, which has reached the highest degree of specialization known in Rodentia.
The so-called prairie-dogs, which are smaller and more slender North American rodents with small cheek-pouches, form a separate genus, Cynosnys; while the term pouched-marmots denotes the various species of souslik, Spermophilus (or Citillus), which are common to both hemispheres, and distinguished by the presence of large cheek-pouches (see RODENTIA).