New species arise by the splitting of lineages. A small sub-population of the ancestral form gives rise to the new species. The new species originates in a very small part of the ancestral species' geographic range in an isolated area at the periphery of the range. New species develop quickly. So said Eldredge and Gould in 
New species arise by the splitting of lineages. A small sub-population of the ancestral form gives rise to the new species. The new species originates in a very small part of the ancestral species' geographic range in an isolated area at the periphery of the range. New species develop quickly. So said Eldredge and Gould in a famous 1972 paper with a new explanation of the fossil record. For 10 points, what two-word name is given to this biological theory?
New species arise by the splitting of lineages. A small sub-population of the ancestral form gives rise to the new species.