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The lineage species concept relies on genetic data and emphasizes distinct evolutionary trajectories between groups, which result in distinct lineages (branches on a phylogenetic tree). The morphological species concept relies on morphological data and emphasizes groups of physical traits that are unique to each species.
phylogenetic species concept (PSC) The concept of a species as an irreducible group whose members are descended from a common ancestor and who all possess a combination of certain defining, or derived, traits (see apomorphy).
Apply the three species concepts (biological, morphological, phylogenetic) to make arguments about whether two populations are distinct species. Identify prezygotic and postzygotic reproductive barriers.
Phylogenetics is a component of systematics that uses similarities and differences of the characteristics of species to interpret their evolutionary relationships and origins.
A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor. Phylogenies are...
The concept of a species as an irreducible group whose members are descended from a common ancestor and who all possess a combination of certain defining, or derived, traits (see apomorphy). Hence, this concept defines a species as a group having a shared and unique evolutionary history.
Phylogenetics, in biology, the study of the ancestral relatedness of groups of organisms, whether alive or extinct. Classification of the natural world into meaningful and useful categories has long been a basic human impulse and is systematically evident at least since time of ancient Greece.
Early efforts at a phylogenetic species concept focused on correcting problems in the Biological Species Concept associated with ancestral populations, then applying phylogenetic logic to species themselves.
Various formulations of a “cladistic” or “phylogenetic species concept” (PSC) have been advanced (7 – 16), but all agree that species concepts and definitions should emphasize criteria of phylogenetic relationship (descent) and not reproductive relationship (interbreeding) (14).
A phylogenetic species concept is advocated that uses a (monistic) grouping criterion of monophyly in a cladistic sense, and a (pluralistic) ranking criterion based on those causal processes that are most important in producing and maintaining lineages in a particular case.