luokkalajin
Luokkalajin is a term used in Finnish biology and ecology to refer to a species that occupies a similar ecological niche and exhibits comparable behaviors to another species within the same or a related community. It is not a formal taxonomic rank but rather a descriptive ecological concept. The idea behind luokkalajin is that different species, even if not closely related, can evolve to fill similar roles in an ecosystem due to similar environmental pressures and available resources.
For example, in a forest ecosystem, several different bird species might forage for insects in the undergrowth.