Planothidium baicalorhombicum Kulikovskiy & Lange-Bert. Planothidium baicalorhombicum Kulikovskiy & Lange-Bert. in Lake Baikal: Hotspot of endemic diatoms II. Iconographia Diatomologica, 26: 59, pl. 68, fig. 1-18. 2015Holotype: Russian Federation, Bolshoi Ushkaniy Island, Lake Baikal , 20 Jul 1965, A.P. Skabitschewsky (IBIW: 15645m)Isotype: Russian Federation, Bolshoi Ushkaniy Island, Lake Baikal , 20 Jul 1965, A.P. Skabitschewsky (SZCZ: 15645a)