Diploneis obtusa Kulikovskiy & Lange-Bert.
Diploneis obtusa in Lake Baikal: Hotspot of endemic diatoms II. Iconographia Diatomologica, 26: 99, t. 160, fig. 1, 2; t. 161, fig. 1, 2. 2015
Holotype: Russian Federation, Lake Baikal, Bolshoi Ushkaniy Island, alt. 456 m, 20 Jul 1965, A.P. Skabitschewsky s.n. (FR: 15646 LB/2)