Basionym Name:Sphaeria problematicus Lesq., in Knowlton (ed.), United States Geological Survey 17: 23, tab. XXXI, fig. 2,2 (1891)
Homotypic synonyms:Sphaerites problematicus (Lesq.) Mesch., Syll. fung. (Abellini) 11: 657 (1892)