Superspecies is a taxonomic rank used for a group of at least two distinctive but closely related species. The rank was popularized by Bernhard Rensch and later by Ernst Mayr. These authors specified that the species involved must have allopatric distributions. The German equivalent Artenkreis (from German Art (species) and Kreis (circle, ring)) i...
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http://en.wikipedia.org/wiki/Superspecies
Species that are very closely related. For example, the Western and Eastern Meadowlarks, the Oak Titmouse and Tufted Titmouse and many other species. These species used to be the same species and then diverged, probably due to geographic isolation. For a list of possible super species in the US.
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http://www.encyclo.co.uk/local/22214
Group of species that appear to have a relatively recent common ancestor.
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http://www.sialis.org/glossary.htm
Refers to races of birds where each has its own geographical location.
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https://www.birds-of-north-america.net/Bird_Terminology.html
One of a group of very closely related Species with non-overlapping breeding ranges, e.g. as found in some vultures, swifts and batises. A term no longer used frequently.
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https://www.encyclo.co.uk/local/22222
No exact match found.
