Australidelphia (Austridelphia) One of the two cohorts into which the Metatheria (marsupials) are often divided. There are five orders: Dasyuromorphia; Diprotodontia; Dromiciopsia; Peramelemorphia; and Syndactyliformes. All except the Dromiciopsia occur in Australia and New Guinea. Because representatives of both cohorts are found in S. America, the hypothesis of a neotropical origin for marsupials (which spread only later into the Australian–New Guinea region and Antarctica) is supported.
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Australia , Compiled from the August 2006 Background Note and supplemented with additional information from the State Department and the editors of this volume.… Notogea , Notogea The Australian faunal region, which possesses a very distinctive fauna. It comprises Australia (including Tasmania), New Guinea, New Zealand,… Spread , spread / spred/ • v. (past and past part. spread ) 1. [tr.] open out (something) so as to extend its surface area, width, or length: I spread a towel… Divide , di·vide / diˈvīd/ • v. 1. separate or be separated into parts: [tr.] consumer magazines can be divided into a number of different categories | [intr.… Gondwanaland , Gondwanaland •and, band, bland, brand, expand, firsthand, gland, grand, hand, land, manned, misunderstand, offhand, rand, righthand, Samarkand, sand,… Gondwana , Gondwana A former supercontinent of the southern hemisphere from which South America, Africa, India, Australasia, and Antarctica are derived. Their e…
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