A. Poppels Riga National ZOO.Meza prospekts 1, LV-1014 Riga, Latvia apoppels@hotmail.com   Abstract Due to climate changes in last decades some Ephemeroptera species characteristic for Central part of Europe now are common in Latvia but some species disappeared. For example, in 2005 Arthroplea congener is stated as a new species for the fauna of Latvia […]