paleontological species concept. paleontological species concept. Definition of species based on morphological differences known only from the fossil record.

Templeton (1989) this idea draws on all three major. variants of the biological species (the evolutionary, isolation. and recognition concepts), and defines species as the “most. inclusive population of individuals having the potential for. phenotypic cohesion through intrinsic cohesion.

Some major species concepts are:

• Typological (or Essentialist, Morphological, Phenetic) species concept.
• Evolutionary species concept.
• Biological species concept.
• Recognition concept.

The “genealogical species concept” of Baum and Donoghue (1995) defines a species as a “basal group of organisms all of whose genes coalesce more recently with each other than with those of any organism outside the group.” Operationally, this species concept would involve tracing the genealogy of several different …

The Hennigian species concept incorporated the interbreeding model of a biological species concept, but with a historical component. This was modified by Willmann (1986) to specifically state that species are reproductively isolated and originate via a stem species branching off into two new species.

evolutionary species concept

The term species boundary can be used to refer to the geographic boundary between parapatric taxa. Discordance among individual gene trees has been documented in many different pairs or groups of species (Beltran et al.

Species are identified on the basis of an organism’s ability to interbreed, in addition to its morphological, behavioral, and biochemical characters. …

While thought not to be very common, a few animal species are the result of hybridization, mostly insects such as tephritid fruitflies that inhabit Lonicera plants and Heliconius butterflies, as well as some fish, one marine mammal, the clymene dolphin, a few birds.

Introgression, also known as introgressive hybridization, in genetics is the transfer of genetic material from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species. Introgression also differs from simple hybridization.

Gene flow is a generic term, and can correctly characterize a whole host of dynamics, while introgression is very specific and precise, a subset of gene flow rather than a synonym. Backcrossing of hybrids of two plant populations to introduce new genes into a wild population.

Hybridization is defined as the concept of mixing two atomic orbitals with the same energy levels to give a degenerated new type of orbitals.