九条犰狳Dasypus novemcinctus是迄今为止最熟悉的犰狳,但犰狳有各种形状,大小和特别有趣的名字。在不太知名的物种中有尖叫的毛茸茸犰狳,较大的长鼻犰狳,南部的裸尾犰狳,粉红色的仙女犰狳(只有一只松鼠的大小)和巨大的犰狳(向上)到120磅,一个中量级战斗机的良好匹配)。所有这些犰狳物种的特点是盔甲电镀头,背部和尾部,这个独特的特征使这个哺乳动物家族得名(西班牙语为“小装甲”。)犰狳是新世界的哺乳动物,起源于南美洲数百万几年前,在新生代时期,中美洲地峡尚未形成,这个大陆与北美隔绝。从大约三百万年前开始,地峡的出现促进了大美洲交汇处,当时各种犰狳物种向北迁移(反过来,其他类型的哺乳动物向南迁移并取代了原产的南美洲动物群)。今天,大多数犰狳只生活在中美洲或南美洲;横跨美洲广阔地区的唯一物种是九条带犰狳,它可以远至德克萨斯州,佛罗里达州和密苏里州。

新西兰梅西大学Assignment代写:关于犰狳的事实

The nine-banded armadillo, Dasypus novemcinctus, is by far the most familiar, but armadillos come in an impressive range of shapes, sizes, and—especially—amusing names. Among the less-well-known species are the screaming hairy armadillo, the greater long-nosed armadillo, the southern naked-tailed armadillo, the pink fairy armadillo (which is only about the size of a squirrel) and the giant armadillo (at up to 120 pounds, a good match for a welterweight fighter). All of these armadillo species are characterized by the armor plating heads, backs and tails, the distinctive feature that gives this family of mammals its name (Spanish for “little armored ones.”) Armadillos are exclusively New World mammals, originating in South America millions of years ago during the Cenozoic Era, when the Central American isthmus had yet to form and this continent was cut off from North America. Starting about three million years ago, the appearance of the isthmus facilitated the Great American Interchange, when various armadillo species migrated north (and, in turn, other types of mammals migrated south and replaced the native South American fauna). Today, most armadillos live exclusively in central or South America; the only species that ranges across the expanse of the Americas is the nine-banded armadillo, which can be found as far afield as Texas, Florida and Missouri.

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