Thorea Hispida was first found in Serbia in the river Danube at the end of the 19th century. This algae is included in the Red List of rare and threatened algae in some European countries:


  • Poland - extinct species,
  • Slovakia and Bulgaria - critically endangered species,
  • Germany - vulnerable,
  • Ukraine - rare species whose populations are small, which currently is not cathegorized as "endangered" or "vulnerable", althought it is danger.



Its habitats in Serbia are critically endangered. The family of Thoreaceae (Rhodobhyta) is a family of freshwater red algae. This alga was discovered only 87 years later, in 1996, in the river Beli Timok. Thorea Hispida is a widespread species in different parts of the world (Europe, Asia, Africa, North America, South America) with different climatic characteristic, but the ecological conditions of habitats where the species is present are very similar. It was found in Serbia in July and August, in river sections where the riverbed is 10-20 m wide, at 0.2-2 m depth, found on a stone and tree branches at non-shady sites, water temperature 22.5-24 degree (C), pH 8.2.