Saint-Petersburg State University
Faculty of Biology

Department of Invertebrate Zoology
Rus | Eng

Evolutionary morphology and reproductive biology of aquatic invertebrates

Head of the Group:
Andrew N. Ostrovsky, PhD, DSc, Professor

Current research:
  • Evolution of reproductive patterns in the marine colonial epibionts
  • Bryozoan life-histories (examples from the White Sea)
  • Systematics and biogeography of cheilostome bryozoans
  • Ultrastructure and evolution of placental analogues in Bryozoa
  • Comparative mioanatomy of marine bryozoans
  • Comparative larval morphology and evolution in marine bryozoans
  • Comparative avicularian neuro- and mioanatomy in marine bryozoans
  • Bacterial symbionts of marine Bryozoa
Planned research:
  • Bacteriophages of marine bryozoans
  • Genomics and transcriptomes of marine Bryozoa
  • Evolution of bryozoan polymorphism
  • Integrity systems in marine bryozoans
  • RSF grant 18-14-00086 “Evolution of the placental analogues in a phylum of aquatic colonial invertebrates (Bryozoa)”, 2018-2020
  • RFBR grant 20-34-90081, “Evolution of neuromuscular system of avicularia in Bryozoa”, 2020-2022
Expeditions and field works:
White, Northern, Black and Mediterranean Seas

Andrey E. Vishnyakov (Associate Professor)
Olga N. Kotenko (Research Assistant)
Uliana A. Nekljudova (PhD student)
Ekaterina T. Shevchenko (PhD student)
Xenia M. Serova (PhD student)
Elena V. Belikova (PhD student)
Vladimir A. Kutjumov (PhD student)
Anna Y. Kvatch (PhD student)
Nadezhda P. Karagodina (Master student)
Evgeny Bogdanov (BSc)

Links and partners:
The Natural History Museum, London
University of Vienna
New Zealand Institute of Water and Atmospheric Research
Smithsonian Tropical Research Institute
International Bryozoology Association

Recent publications:

  1. Schwaha T.F., Ostrovsky A.N., Wanninger A. (2020). Key novelties in the evolution of Bryozoa: evidence from the soft-body morphology. Biological Reviews 95(3): 696-729. DOI: 10.1111/brv.12583
  2. Shevchenko E.T., Varfolomeeva M.A., Nekliudova U.A., Kotenko O.N., Usov N.V., Granovitch A.I., Ostrovsky A.N. (2020). Electra vs Callopora: Life-histories of two bryozoans with contrasting reproductive patterns from the White Sea. Invertebrate Reproduction and Development 64(2): 137-157. DOI: 10.1080/07924259.2020.1729260
  3. Maggioni D., Schiavo A., Ostrovsky A.N., Seveso D., Galli P., Arrigoni R., Berumen M.L., Benzoni F., Montano S. (2020). Zanclea divergens (Hydrozoa, Zancleidae) is a complex of bryozoan-associated cryptic species showing different patterns of diversification. Molecular Phylogenetics and Evolution 151. DOI: 10.1016/j.ympev.2020.106893
  4. Schwaha T., Moosbrugger M., Walzl M., Ostrovsky A.N. (2019). First ultrastructural evidence of placental nutrition in a ctenostome bryozoan: example of Amathia verticillata. Zoomorphology 138(2): 221-232. DOI: 10.1007/s00435-019-00438-4
  5. Nekliudova U.A., Shunkina K.V., Grishankov A.V., Varfolomeeva M.A., Granovitch A.I., Ostrovsky A.N. (2019). Colonies as dynamic systems: reconstructing the life-history of Cribrilina annulata (Bryozoa) on two algal substrates. Journal of the Marine Biological Association of the United Kingdom 99(6): 1363-1377. DOI: 10.1017/S0025315419000286
  6. Kvach A.Y., Varfolomeeva M.A., Kotenko O.N., Sukhotin A.A., Kutiumov V.A., Grischenko A.V., Granovitch A.I., Ostrovsky A.N. (2019). Life history of the ctenostome bryozoan Flustrellidra hispida in the White Sea. Invertebrate Zoology 16(4): 343-360. DOI: 10.15298/invertzool.16.4.03
  7. Nekliudova U.A., Schwaha T., Kotenko O.N., Gruber D., Cyran N., Ostrovsky A.N. 2019. Sexual reproduction of the placental brooder Celleporella hyalina (Bryozoa, Cheilostomata) in the White Sea. Journal of Morphology 280: 278-299. DOI: 10.1002/jmor.20943
  8. Sokolover N., Ostrovsky A.N., Ilan M. 2018. Schizoporella errata (Bryozoa: Cheilostomata) in the Israeli Mediterranean Sea: abundance, growth rate and reproduction strategy. Marine Biology Research. DOI: 10.1080/17451000.2018.1526385
  9. Schwaha T., Handschuh S., Ostrovsky A.N., Wanninger A. 2018. Morphology of the bryozoan Cinctipora elegans (Cyclostomata, Cinctiporidae) with the first data on its sexual reproduction and the cyclostome neuro-muscular system. BMC Evolutionary Biology 18: 92. DOI: 10.1186/s12862-018-1206-1
  10. Mathew M., Schwaha T., Ostrovsky A.N., Lopanik N.B. 2018. Symbiont-dependent sexual reproduction in marine colonial invertebrate: morphological and molecular evidence. Marine Biology 165: 14. DOI: 10.1007/s00227-017-3266-y
  11. Karagodina N.P., Vishnyakov A.E., Kotenko O.N., Maltseva A.L., Ostrovsky A.N. 2018. Ultrastructural evidence for nutritional relationships between a marine colonial invertebrate and its bacterial symbionts. Symbiosis 75: 155-164. DOI: 10.1007/s13199-017-0516-1
  12. Bolotov, I.N., Makhrov, A.A., Gofarov, M.Yu., Aksenova, O.V., Aspholm, P.E., Bespalaya, Yu.V., Kabakov, M.B., Kolosova, Yu.S., Kondakov, A.V., Ofenbock, T., Ostrovsky, A.N., Popov, I.Yu., von Proschwitz, T., Rudzite, M., Rudzitis, M., Sokolova, S.E., Valovirta, I., Vikhrev, I.V., Vinarski, M.V., Zotin, A.A. 2018. Climate warming as a possible trigger of keystone mussel population decline in oligotrophic rivers at the continental scale. Scientific Reports 8: 35. DOI: 10.1038/s41598-017-18873-y
  13. Serova K.M., Vishnyakov A.E., Zaytseva O.V., Kotenko O.N., Ostrovsky A.N. 2017. Comparative analysis of the nervous system of polymorphic zooids in marine bryozoans. Doklady Academii Nauk, Biological Sciences 475(2): 234-237 [in Russian] DOI: 10.7868/S0869565217200269; Doklady Biological Sciences 475: 144-147 [in English]. DOI: 10.1134/S0012496617040056
  14. Ostrovsky A.N., Lidgard S., Gordon D.P., Schwaha T., Genikhovich G., Ereskovsky A.V. 2016. Matrotrophy and placentation in invertebrates: a new paradigm. Biological Reviews 91: 673-711. DOI: 10.1111/brv.12189
  15. Ostrovsky A.N. 2013. Evolution of the sexual reproduction in marine invertebrates: example of gymnolaemate Bryozoa. Springer Verlag: Dordrecht, Heidelberg, New York. 356 pp.
  16. Shunkina K.V., Starunov V.V., Zaytseva O.V., Ostrovsky A.N. 2015. Comparative morphology of the nervous system in three phylactolaemate bryozoans. Frontiers in Zoology 12: 28. DOI:10.1186/s12983-015-0112-2
  17. Ostrovsky A.N. 2013. From incipient to substantial: evolution of placentotrophy in a phylum of aquatic colonial invertebrates. Evolution 67(5): 1368-1382. DOI: 10.1111/evo.12039
  18. Lidgard S., Carter M.C., Dick M.H., Gordon D.P., Ostrovsky A.N. 2012. Division of labor and recurrent evolution of polymorphisms in a group of colonial animals. Evolutionary Ecology 26(2): 233–257. DOI: 10.1007/s10682-011-9513-7
  19. Moosbrugger M., Schwaha T., Walzl M.G., Obst M., Ostrovsky A.N. 2012. The placental analogue and the pattern of sexual reproduction in the cheilostome bryozoan Bicellariella ciliata (Gymnolaemata). Frontiers in Zoology 9: 29. DOI:10.1186/1742-9994-9-29

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