Dictionary definition: cohesion species concept

Dictionary definition: typological species concept
A Dictionary of Biology;      330 words ...typological species concept The concept of a species as a group ... other concepts, notably the biological species concept . These could better account for the ... agamospecies ). See also phylogenetic species concept .

Encyclopedia entry: species concept
The Oxford Companion to the Earth;      700+ words ...species concept The definition of a species is a problem that has exercised the minds ... and the other morphological or shape-related. The reproductive species concept states that species are communities of interbreeding organisms ...

Dictionary definition: phylogenetic species concept
A Dictionary of Zoology;      286 words ...phylogenetic species concept The view that a species should be defined only by its diagnosibility ... Cracraft in 1982 as a more workable alternative to the biological species concept , which implies knowledge of whether or not regular interbreeding ...

Dictionary definition: evolutionary species concept
A Dictionary of Zoology;      259 words ...evolutionary species concept A suggestion made by G. G. Simpson for adapting the biological species concept for a palaeontological context: ‘a species is a lineage with its own evolutionary role and tendencies’.

Dictionary definition: recognition species concept
A Dictionary of Zoology;      282 words ...recognition species concept The concept that a species is characterized by a unique fertilization ... with other species. This changes the emphasis in the biological species concept from negative (not interbreeding with other species) to positive ...

Dictionary definition: biological species concept
A Dictionary of Biology;      365 words ...biological species concept ( BSC ) The concept of a species as a group of populations whose ... and early 20th centuries, largely replacing the typological species concept favoured by pioneer naturalists. Central to the concept is the ...

Dictionary definition: internodal species concept
A Dictionary of Zoology;      263 words ...internodal species concept The notion that a species exists between two branching points in a fossil lineage; it is based on a fiction, maintained as a convenience by Willi Hennig , that a species ceases to exist as soon as it branches into two daughter species.