| 释义 |
therian, a. (n.) Zool.|ˈθɪərɪən|
[a. mod.L. Theria (Parker & Haswell Textbk. Zool. (1897) II. 448), f. Gr. θήρ, θηρίον wild beast.]
Of or pertaining to the subclass Theria, one of the four subclasses into which the class Mammalia is commonly divided. Also as n., a placental or marsupial mammal belonging to this subclass.
1960McGraw-Hill Encycl. Sci. & Technol. XIII. 549/2 Therian mammals are characterized by the distinctive structural history of the molar teeth. 1971Nature 23 Apr. 506/1 The ‘cochlea’ in birds and reptiles is only slightly curved, in contrast to the tightly coiled cochlea of therian mammals. 1974D. & M. Webster Compar. Vertebr. Morphol. v. 99 The more generalized therians have a clavicle, extending ventromedially and articulating with the anterior portion of the sternum. 1977Sci. Amer. Aug. 79/3 The marsupials have retained the basic ancestral therian reproductive pattern. |