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乳齿象
释义
乳齿象
Encyclopedia
理学
哺乳纲(化石)
释
mastodont
乳齿象
狭义的作为一个属名,现在被认为是玛姆象属(Mammut)的同物异名,在分类学上已被弃置不用,仅作为美洲乳齿象(Mammut americanum)的通称。而广义的曾经被作为一个超科分类单元,包括了从晚渐新世到更新世的多种象类。随着系统演化理论和支序分系方法的兴起,乳齿象这一并系的类群逐渐被拆解,最终不再成为正式的分类单元。从现在的分类角度,广义的乳齿象类包括现在的古乳齿象类、玛姆象类、嵌齿象类,以及剑齿象类和真象类的最原始的成员。
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CIPM
CIPM Consultative Committees
ci-poem
Ci-Poems by Li Jing and Li Yu
Ci Poems by Poets of the Ming Dynasty Selected by Catelog
Ci Poems by Yang Sheng'an
Ci Poems from the Cottage of the Yuan Dynasty
ci-poems in Tang and Five Dynasties
Ci-Poems in Whole Tang and Five Dynasties
Ci Poems of Sixteen Poets Collected in the Xinrizhai Library
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Ci Poems Throughout the History
Ci Poem to the Tune Wind in the Pines by Song Guang
Ci Poetry
ci poetry comments of huifeng
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