A living fossil is a deprecated term for an extant taxon that phenotypically resembles related species known only from the fossil record. To be considered a living fossil, the fossil species must be old relative to the time of origin of the extant clade .

It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct. For example: The Indian elephant (Elephas maximus) is an extant species, and the woolly mammoth (Mammuthus primigenius) is an extinct species.

現生種（英語： Extant taxon ）一般是使用在仍然存活的分類單元（諸如物種、屬或是科），是今生物学的主要研究對象。 這個詞彙與 滅絕 形成對比。 比如說， 北極狼 是一種現生物種，而 日本狼 則是已滅絕的物種。

現生種（英語： Extant taxon ）一般是使用在仍然存活的分類單元（諸如物種、屬或是科），是今生物學的主要研究對象。 這個詞彙與 滅絕 形成對比。 比如說， 北極狼 是一種現生物種，而 日本狼 則是已滅絕的物種。

It is often assumed in this example that the terminal branches of the cladogram depict all the extant taxa of a given rank within the clade; this is one reason the term basal is highly deceptive, as the lack of additional species in one clade is taken as evidence of morphological affinity with ancestral taxa. Additionally, this qualification ...

“分類單元”一詞由德国學者 阿道夫·迈尔-阿比希 （ 德语 ： Adolf Meyer-Abich ） 在1926年首創並用於動物分類，原文作“taxon”，是英文“taxonomy”（分類學）的 逆構詞 （ 英语 ： Back-formation ） ，“taxonomy”一詞來自古希腊文“τάξις”（拉丁轉寫：taxis，意為 ...

It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct. For example: The Indian elephant (Elephas maximus) is an extant species, and the woolly mammoth (Mammuthus primigenius) is an extinct species.

In biology, an extant group is one which has survived to the present day, and so it is a living group. This distinguishes it from an extinct group. The term 'extant' can also be used to describe species or higher groups (such as genera or families ) which are still in existence (living).

现生种（英语： Extant taxon ）一般是使用在仍然存活的分类单元（诸如物种、属或是科），是今生物学的主要研究对象。 这个词汇与 灭绝 形成对比。 比如说， 北极狼 是一种现生物种，而 日本狼 则是已灭绝的物种。

The Wikidata item linked to this page is extant taxon (Q310891). Use this template only on hard redirects – for soft redirects use {{ Soft redirect with Wikidata item }} . From a related word or phrase : This is a redirect from a word or phrase ( term ) to …