| author | date | title | journal / publication | Timoshkin OA, Zaytseva EP, Gutsol MV | 2009 | abs. | New species of microscopic psammophilous turbellarians of the genus Opisthocystis (Plathelminthes, Kalyptorhynchia) from Lake Baikal | Zoologicheski Zhurnal 88 (4): 398-413 |
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| Opisthocystis marinae Timoshkin, Zaytseva & Gutsol, 2009 | w | primary taxonomic authority (describer) | 402-404 | |
| Opisthocystis aleksandri Timoshkin, Zaytseva & Gutsol, 2009 | w | primary taxonomic authority (describer) | 408-410 | |
| Opisthocystis igori Timoshkin, Zaytseva & Gutsol, 2009 | w | primary taxonomic authority (describer) | 410-412 | |
| Opisthocystis kornilorum Timoshkin, Zaytseva & Gutsol, 2009 | w | primary taxonomic authority (describer) | 407-408 | |
| Opisthocystis meyeri Timoshkin, 2009 | w | primary taxonomic authority (describer) | 400-402 | |
| Opisthocystis novitzkyi Timoshkin, Zaytseva & Gutsol, 2009 | w | primary taxonomic authority (describer) | 399-400 | |
| Opisthocystis stepashi Timoshkin, Zaytseva & Gutsol, 2009 | w | primary taxonomic authority (describer) | 404-406 | |
| Opisthocystis sturmbaueri Timoshkin, Zaytseva & Gutsol, 2009 | w | primary taxonomic authority (describer) | 406-407 |