Retrieved from https://en.wiktionary.org/w/index.php?title=monocline&oldid=48089207
Speciation, the formation of new and distinct species in the course of evolution. Speciation involves the splitting of a single evolutionary lineage into two or more genetically independent lineages.
This is why speciation is considered to be a macroevolutionary process, as it involves the divergence of a new phylogenetic line (i.e. a new species) from an existing one. This is also why the post on macroevolution on my blog includes examples of speciation as macroevolution.