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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.
Parareptilia ("near-reptiles") is an extinct clade of basal sauropsids/reptiles, typically considered the sister taxon to Eureptilia (the group that likely contains all living reptiles and birds). Parareptiles first arose near the end of the Carboniferous period and achieved their highest diversity during the Permian period .
Males are larger than females, weighing up to 40% more. While the mating season is not defined, they typically mate once each year, usually during the summer or autumn. Rather than the males seeking out the females, males mark their location with urine or feces and the females find them. If competition over a female occurs, the males use their ...
Taxoboxes display the "taxonomic hierarchy". ("Taxon" is a general term for a named group of organisms, such as a subspecies, a species, a family, an order, etc.) The taxonomic hierarchy shows the location of the taxon within a particular classification system; e.g. for a genus, it may show its family, order, etc. up to kingdom.
In a 2012 molecular study, von Reumont et al. challenge the monophyly of Vericrustacea: they present four versions of Pancrustacea cladogram (figures 1–4), and in all four figures Remipedia is a sister group to Hexapoda, and Branchiopoda is a sister group to (Remipedia + Hexapoda). Thus, their data strongly suggest that Branchiopoda is more ...
In fact, the Malacostracan has a well-documented fossil record, that, although patchy or missing entirely (ghost lineage) for certain clades, offer a unique opportunity to analyse the morphology of the ancestral taxa of a clade or a dead-end sister taxa , whose age (determined by its stratigraphy) gives an estimate of how long has a group been ...
A hand-drawn map offered to authorities a day after the state of Mississippi executed killer David Neal Cox has led to the apparent remains of his missing
Thecamonas trahens is a species within the family Apusomonadidae, which holds significant evolutionary interest due to its status as a sister taxon to the Opisthokonts—a group that includes animals, fungi, and certain protists.