Pseudostaurosira ushkaniensis Kulikovskiy & Lange-Bert. Pseudostaurosira ushkaniensis Kulikovskiy & Lange-Bert. in Lake Baikal: Hotspot of endemic diatoms II. Iconographia Diatomologica, 26: 28, pl. 16, fig. 1-12. 2015Holotype: Russian Federation, Bolshoi Ushkaniy Island, Lake Baikal, 20 Jul 1965, A.P. Skabitschewsky (IBIW: 15655m)Isotype: Russian Federation, Bolshoi Ushkaniy Island, Lake Baikal, 20 Jul 1965, A.P. Skabitschewsky (SZCZ: 15655a)