Living fossil - Wikipedia
网页A living fossil is 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. Living fossils commonly are of species-poor lineages, but they need not be.
現生種 - 维基百科，自由的百科全书
网页現生種 （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。.
现生种 - 维基百科，自由的百科全书
网页现生种（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。
Neontology - Wikipedia
网页A taxon can be classified as extinct if it is broadly agreed or certified that no members of the group are still alive. Conversely, an extinct taxon can be reclassified as extant if there are new discoveries of living species (" Lazarus species "), or if previously known extant species are reclassified as members of the taxon.
Extant Taxon - an overview | ScienceDirect Topics
网页Extant members of the Taxaceae are evergreen shrubs or small trees with helically arranged leaves. Pollen-bearing cones have microsporophylls with three to nine pollen sacs. Members of this group differ from other conifers in bearing a single ovule (occasionally two) terminally on a modified shoot.
A nomenclature for fossil and living turtles using phylogenetically ...
网页2021年2月9日 · The definitions we use for various extinct turtle clades approximate maximum-clade definitions (PhyloCode 2020, Art. 9.6), but can be conceptualized as being opposite to maximum-crown-clade definitions, in that the internal specifier is extinct, while every extant taxon serves as an external specifier.
Relationships of Cetacea (Artiodactyla) Among Mammals: Increased Taxon ...
网页2009年9月23日 · Five carnivoramorphans were added: one basal extinct taxon (†Vulpavus), and within Carnivora two extant feliforms (Nandinia and Felis), and two extant caniforms (Canis and Ailurus). We also sampled an extant lipotyphlan insectivore ( Erinaceus ).
In defense of living fossils | Biology & Philosophy - Springer
网页2019年4月3日 · This paper defends a particular phylogenetic conception of living fossils, or taxa that (a) exhibit deep prehistoric morphological stability; (b) contain few extant species; and (c) make a high contribution to phylogenetic diversity. The paper shows how this conception of living fossils can make sense of recent research on contested cases.
The phylogeny of the living and fossil Sphenisciformes (penguins)
网页2007年10月1日 · The extant genera are all monophyletic in the strict consensus tree of the combined analysis . Aptenodytes is the most basal extant taxon, and Pygoscelis is sister to (Spheniscus + Eudyptula) + (Eudyptes + Megadyptes). The fossil Spheniscus species form a clade with living members of the genus in this result.
Reconstructing the Diet of an Extinct Hominin Taxon: The Role of Extant …
网页2012年5月24日 · Here we review how these methods have and might be used to reconstruct the diet of a particular extinct hominin, Paranthropus boisei, which has no extant analogue for its highly derived masticatory morphology. Our review emphasizes the potential and limitations of using extant primates as models for the reconstruction of extinct hominin diets.