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The term sister group is used in phylogenetic analysis, however, only groups identified in the analysis are labeled as "sister groups".. An example is birds, whose commonly cited living sister group is the crocodiles, but that is true only when discussing extant organisms; [3] [4] when other, extinct groups are considered, the relationship between birds and crocodiles appears distant.
This is a list of lists of deaths of notable people, organized by year. New deaths articles are added to their respective month (e.g., Deaths in February 2025 ) and then linked below. 2025
Gnathifera is a member of Spiralia. It is the sister taxon of a clade comprising all other spiralians. [1] [20] An alternative phylogeny place Gnathifera into a main spiralian clade Platyzoa s.l. as sister clade to Mesozoa and Platyhelminthes. [22]
This is a list of people who died in the last 5 days with an article at the English Wikipedia. For people without an English Wikipedia page see: Wikipedia:Database reports/Recent deaths (red links). Generally updated at least daily, last time: 10:49, 05 February 2025 (UTC).
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The crown age of a clade refers to the age of the most recent common ancestor of all of the species in the clade. The stem age of a clade refers to the time that the ancestral lineage of the clade diverged from its sister clade. A clade's stem age is either the same as or older than its crown age. [15] Ages of clades cannot be directly observed.
Synapsids are a clade of amniotes, that had one opening on the sides of the skull. The synapsids' sister clade are the sauropsids. They appeared in the Late Carboniferous, the same time as the first sauropsids. Subtaxon Therapsids include mammals
List of assassinations; List of unsolved deaths; List of murdered hip hop musicians; List of deaths in rock and roll; List of deaths from drug overdose and intoxication; Lists of people by cause of death; List of unusual deaths; Lists of poisonings; Lists of victims of the September 11 attacks