1. Department of Invertebrate Zoology; Faculty of Biology; St. Petersburg State University; Universitetskaya nab. 7/9 St. Petersburg 199034 Russia
2. Laboratory of Cytology of Unicellular Organisms; Institute of Cytology RAS; Tikhoretsky ave. 4 St. Petersburg 194064 Russia
3. Laboratory of Parasitic Worms and Protistology; Zoological Institute RAS; Universitetskaya nab. 1 St. Petersburg 199034 Russia
4. Core Facility Center “Development of Molecular and Cell Technologies”; St. Petersburg State University; Botanicheskaya str. 17, Stary Peterhof St. Petersburg 198504 Russia