There have been quite a few developments in how BWARS deals with species - primarily moving to a species concept basis. Simply put, this relates the interpretation of a name to a publication, which in turn relates to the type specimen. A more complete illustration can be found in the downloads on this page.
All data received, verified and validated by BWARS up to 2020 has been mapped.
Vikberg, V.V. A re-evaluation of five European species of Spilomena with a key to European species and relevance to the fauna of North Europe, especially Finland (Hymenoptera: Pemphredonidae)
Seiffert, B. Clarifying naming and identification of the outdoor species of the ant genus Tapinoma FÖRSTER, 1850 (Hymenoptera: Formicidae) in Europe north of the Mediterranean region with description of a new species