| 词条 | Myomorpha |
| 释义 |
| fossil_range = {{Fossil range|47.8|0}}Ypresian - Recent | image = Sinaistachelmaus.jpg | image_caption = Eastern spiny mouse (Acomys dimidiatus) | taxon = Myomorpha | authority = Brandt, 1855 | subdivision_ranks = Superfamilies | subdivision =Muroidea Dipodoidea }} The suborder Myomorpha contains 1,137 species of mouse-like rodents, nearly a quarter of all mammal species. Included are mice, rats, gerbils, hamsters, lemmings, and voles. They are grouped according to the structure of their jaws and molar teeth. They are characterized by their myomorphous zygomasseteric system, which means that both their medial and lateral masseter muscles are displaced forward, making them adept at gnawing. As in the hystricognathous rodents, the medial masseter muscle goes through the eye socket, a feature unique among mammals. Myomorphs are found worldwide (apart from Antarctica) in almost all land habitats. They are usually nocturnal seed-eaters. Most myomorph species belong to the superfamily Muroidea: (hamsters, voles, lemmings, true mice, true rats, and gerbils).
Historically, the definition of the suborder Myomorpha has included one or both of:
References
4 : Rodent taxonomy|Mammal suborders|Extant Eocene first appearances|Taxa named by Johann Friedrich von Brandt |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。