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It is thought that the two species may have begun to diverge from a marine common ancestor following the changes in coastline during the Miocene.
In phylogenetic systematics they are variously defined as the common ancestor and all its descendants of Younginiforms and "crown diapsids" (the common ancestor of lizards, crocodilians and birds, and all their descendants) Callaway 1997, or all diapsids that are more closely related to Sauria than to Araeoscelidia (Laurin and Gauthier 2000).
These water kingfishers are descended from a common ancestor which seems to have been closely related to a progenitor of the Pied Kingfisher (which at that stage had not yet lost the metallic plumage tone), and are similar in plumage and habits (Moyle, 2006).
These are in may be derived from a common ancestor of the Pacific Black Duck, the Laysan Duck, and the Mallard, and an unknown amount of other lineages.
Derived trait, in phylogenetics, a trait present in an organism, but absent in the last common ancestor of its group
Failbe was of the same kindred as Columba, the Cenél Conaill, distantly related to him through their common ancestor Conall Gulban.
Gens (pl. Gentes), in Ancient Rome, a family of those sharing the same nomen and a common ancestor
He then married Doña Rosa Juliana Sánchez de Tagle; who was also a member of an important Cantabrian aristocratic family originated from Santillana del Mar, which apparently beloned to the Marquis of Altamira and shared a common ancestor with the Marquis of Torre Tagle.
Analysis of the genome suggests that the last common ancestor of sponges and eumetazoan animals (a clade that contains all the higher animals except the sponges and placozoans) was more complex both genetically and morphologically than had previously been thought.
Parvipelvia is a node-based taxon defined in 1999 as "the last common ancestor of Hudsonelpidia, Macgowania, Ichthyosaurus and all of its descendants".
Amborella represents the first known group of flowering plants to separate from their common ancestor.
Proto-Human language, a designation of the hypothetical most recent common ancestor of all the world's languages
He penned a number of articles on Africa, as well as a book on anthropoid apes, a treatise in which he discusses the possibility that humans and apes may have a common ancestor.
The ancient Hebrew nation (the Israelites) is one of the better-known examples, with biblical tradition denoting 12 tribes originating from one common ancestor (Jacob).
Molecular markers show the Strong-billed Honeyeater separated from the common ancestor of the Brown-headed and Black-chinned Honeyeaters between 6.7 and 3.4 million years ago.
Local tradition asserts a single common ancestor for the community (one Ded Nika) and suggests that the population moved to Theth some 300 to 350 years ago in order to preserve their (Catholic) Christian traditions.
The Koala and wombats are believed by many biologists to share a common ancestor and to have diverged only recently in the Cenozoic.