grass unique to
Belgium, the Brome of the Ardennes Bromus
apparently extinct in the wild has been successfully germinated at
Kew's Royal Botanic Gardens (European
Among the invertebrate species described from Belgium and not known from elsewhere are a cave-dwelling rove beetle Tychobythinus belgicus (p. 4 of CWEPSS pdf file), a parasitic wasp Cleruchus raignieri (p. 39 of biosoil.ru pdf file), the cave-dwelling springtails Oncopodura dethieri (ResearchGate) and Deharvengiurus severini (fr.wikipedia), and a sheetweb spider Diplocephalus caecus (araneae).
Two freshwater diatoms, Eunotia belgica and Encyonopsis horticola, were recently described from Belgium (IngentaConnect).