Wadeura
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Wadeura is a genus of ponerine ants containing four described species native to parts of Central and South America. Originally described in 1939 by N. A. Weber, it was synonymized under Pachycondyla f
Species
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A species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. It can be defined as the largest group of organisms in which any two individuals o
All adult Eurasian blue tits share the same coloration, unmistakably identifying the morphospecies.
Ernst Mayr proposed the widely used Biological Species Concept of reproductive isolation in 1942.
Palaeontologists are limited to morphological evidence when deciding whether fossil life-forms like these Inoceramus bivalves formed a separate species.
Blackberries belong to any of hundreds of microspecies of the Rubus fruticosus species aggregate.