 Although the fungus is one of the most common in Central Europe , the species was not validly described until 1968 by German mycologist Frieder Gröger . Before this , L. deterrimus was regarded as a variety of L. deliciosus ( L. deliciosus var. piceus , described by Miroslav Smotlacha in 1946 ) . After Roger Heim and A. Leclair described L. semisanguifluus in 1950 , this fungus was referred to as the latter . L. fennoscandicus was separated from L. deterrimus in 1998 by Annemieke T. Verbeken and Jan Vesterholt and was classified as a separate species . 
