therianadj.n.
/ˈθɪərɪən/ Zoology.
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.
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the world > animals > mammals > [noun] > placental and marsupial mammals
therian1960
the world > animals > mammals > [adjective] > placental and marsupial
therian1960
1960 McGraw-Hill Encycl. Sci. & Technol. XIII. 549/2 Therian mammals are characterized by the distinctive structural history of the molar teeth.
1971 Nature 23 Apr. 506/1 The ‘cochlea’ in birds and reptiles is only slightly curved, in contrast to the tightly coiled cochlea of therian mammals.
1974 D. Webster & 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.
1977 Sci. Amer. Aug. 79/3 The marsupials have retained the basic ancestral therian reproductive pattern.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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adj.n.1960