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词汇 diphyletic
分类 英语词汇 英语翻译词典
释义

diphyletic /ˌdaifai'letik//ˌdaɪfaɪˈlɛtɪk/

英汉-汉英词典
adj. 来自二个祖先的,二源的
词组 | 习惯用语
您要查找的是不是：
  • dialectic n. 逻辑论证法；辩证法 adj. 辩证的
  • dietetic adj. 饮食的；饮食学的
  • hypothetic adj. 假设的,假定的
  • syphilitic adj. 梅毒的；感染梅毒的 n. 梅毒病人
diphyletic 二源的
中文百科

并系群 Paraphyly

（重定向自Diphyletic）
图中分支顶端由左至右分别为鱼类、两栖类、哺乳类、爬行类（龟类、鳞龙类、鳄类）与鸟类，蓝色部分是爬行类，该类群以较晚近的研究结果而言，因不包含其共同祖先的所有后代，因此是一个并系群。
Los reptiles (en sentido estricto) son un grupo parafilético. El grupo puede hacerse monofilético al incluir a las aves.
Reptilia (green field) is a paraphyletic group comprising all amniotes (Amniota) except for two subgroups Mammalia (mammals) and Aves (birds); therefore, Reptilia is not a clade. In contrast, Amniota itself is a clade, which is a monophyletic group.
Cladogram of the primates, showing a monophyly (the simians, in yellow), a paraphyly (the prosimians, in blue, including the red patch), and a polyphyly (the night-active primates, the lorises and the tarsiers, in red).

并系群（英语：Paraphyletic group）是支序分类中的一种分类单元，此分类群中的成员皆拥有「最近共同祖先」，但该群中并不包含此最近共同祖先之所有后代。

一个类群是否为并系群，需依不同的分类标准，如不同的DNA串行的比对结果而决定。

英语百科

Paraphyly 并系群

（重定向自Diphyletic）
Reptilia (green field) is a paraphyletic group comprising all amniotes (Amniota) except for two subgroups Mammalia (mammals) and Aves (birds); therefore, Reptilia is not a clade. In contrast, Amniota itself is a clade, which is a monophyletic group.
Cladogram of the primates, showing a monophyly (the simians, in yellow), a paraphyly (the prosimians, in blue, including the red patch), and a polyphyly (the night-active primates, the lorises and the tarsiers, in red).
Wasps are paraphyletic, consisting of the clade Apocrita without ants and bees, which are not usually considered to be wasps.
图中分支顶端由左至右分别为鱼类、两栖类、哺乳类、爬行类（龟类、鳞龙类、鳄类）与鸟类，蓝色部分是爬行类，该类群以较晚近的研究结果而言，因不包含其共同祖先的所有后代，因此是一个并系群。

In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and all descendants of that ancestor excluding a few—typically only one or two—monophyletic subgroups. The group is said to be paraphyletic with respect to the excluded subgroups. The term is commonly used in phylogenetics (a subfield of biology) and in linguistics.
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