Irena Kaczmarska
Publications
Selected publications:
Kaczmarska, I. & J.M. Ehrman. 2026. Cyclotellamima, a Rupelian diatom with cyclotelloid morphology but no fultoportula from the Central Paratethys. Diatom Research (accepted 7 August 2026).
Samanta, B., A. Shaik, I. Kaczmarska & J.M. Ehrman. 2026. Exploring the potential of the ITS2 secondary structure as a phylogenetic marker distinguishing the cryptic diversity within the diatom genera Stephanocyclus and Cyclotella. Botanica Marina (accepted 4 August 2026).
Kaczmarska, I. & J.M. Ehrman. 2026. New insights into Late Cretaceous araphid diatoms from the Central Arctic Ocean. European Journal of Phycology .
Kaczmarska, I., J. M. Ehrman & B. Samanta, 2025. Oligocene archaeomonad stomatocysts from the Polish Central Paratethys. Acta Palaeontologica Polonica 70: 385-410.
Kaczmarska, I., J. M. Ehrman & B. Samanta, 2025. Auxospore structure and development in Toxarium sp. Nova Hedwigia 120: 577-590.
Kaczmarska, I. & J.M. Ehrman. 2024. Silicoflagellates and other siliceous micro- and nannofossils from Rupelian diatomites, southeastern Poland. Plant and Fungal Systematics 61:1-14.
Kaczmarska, I. & J.M. Ehrman. 2023. Parmalean and other siliceous nannofossils from the Oligocene Flysch Carpathians. Acta Palaeontologica Polonica 68: 441-456.
Kaczmarska, I., J.M. Ehrman & M.P. Ashworth. 2022. Sexual reproduction and auxospore development in the diatom Biddulphia biddulphiana. PLoS ONE 17: e0272778.
Kaczmarska, I., J.M. Ehrman, K.E. Mills, S.G. Sutcliffe & B. Samanta 2022. Vegetative cell enlargement in selected centric diatom species - an alternative way to propagate an individual genotype. European Journal of Phycology 58: 315-332.
Kaczmarska, I. & J.M Ehrman. 2021. Enlarge or die! An auxospore perspective on diatom diversification. Organisms Diversity & Evolution 21: 1-23.
Kaczmarska, I., J.M. Ehrman, N.A. Davidovich, O.I. Davidovich & Y.A. Podunay. 2020. Valve morphogenesis in selected centric diatoms. Botany 98: 725-733.
Samanta, B., I. Kaczmarska & J.M. Ehrman. 2020. Auxosporulation in Biddulphia tridens (Ehrenb.) Ehrenb. (Mediophyceae, Bacillariophyta). European Journal of Phycology 55: 296-309.
Kaczmarska, I., B. Samanta, J.M. Ehrman & E.M.A. Porcher. 2019. Auxosporulation in Chaetoceros acadianus sp. nov. (Bacillariophyceae), a new member of the Section Compressa. European Journal of Phycology 54: 206-221.
Samanta, B., J.M. Ehrman & I. Kaczmarska. 2018. A consensus secondary structure of ITS2 for the diatom Order Cymatosirales (Mediophyceae, Bacillariophyta) and reappraisal of the order based on DNA, morphology, and reproduction. Molecular Phylogenetics and Evolution 129: 117-129.
Samanta, B., Q. Heffell, J.M. Ehrman & I. Kaczmarska. 2018. Spermatogenesis in the bipolar centric diatom Plagiogrammopsis vanheurckii (Mediophyceae). Phycologia 57: 354-359.
Davidovich, N.A., O.I. Davidovich, Y.A. Podunay, R. Gastineau, I. Kaczmarska, A. Poul穩kov獺, & A. Witkowski. 2017. Ardissonea crystallina has a type of sexual reproduction that is unusual for centric diatoms. Scientific Reports 7: 14670.
Kaczmarska, I., B.S. Gray Jr., J.M. Ehrman & M. Thaler. 2017. Sexual reproduction in plagiogrammacean diatoms: first insights into the early pennates. PLoS ONE 12: e0181413.
Samanta, B., M.E. Kinney, Q. Heffell, J.M. Ehrman & I. Kaczmarska. 2017. Gametogenesis and auxospore development in the bipolar centric diatom Brockmanniella brockmannii (Family Cymatosiraceae). Protist 168: 527-545.
Gastineau, R., G. Hansen, N.A. Davidovich, O. Davidovich, J.-F. Bardeau, I. Kaczmarska, J. Ehrman, V. Leignel, Y. Hardivillier, B. Jacquette, M. Poulin, M. Moran癟ais, J. Fleurence & J.-L. Mouget. 2016. A new blue-pigmented hasleoid diatom, Haslea provincialis, from the Mediterranean Sea. European Journal of Phycology 51:156-170.
Luddington, I.A., C. Lovejoy & I. Kaczmarska. 2016. Species-rich meta-communities of the diatom order Thalassiosirales in the Arctic and northern Atlantic Ocean. Journal of Plankton Research 38: 781-797.
Kaczmarska, I. & J.M. Ehrman. 2015. Auxosporulation in Paralia guyana MacGillivary (Bacillariophyta) and possible new insights into the habit of the earliest diatoms. PLoS ONE 10: e0141150.
MacGillivary, M.L. & I. Kaczmarska. 2015. Paralia (Bacillariophyta) stowaways in ship ballast: implications for biogeography and diversity of the genus. Journal of Biological Research-Thessaloniki 22: 2.
Kaczmarska, I. & J.M. Ehrman. 2015. High colonization and propagule pressure by ship ballast as a vector for the diatom genus Pseudo-nitzschia. Management of Biological Invasions 6: 31-43.
Edgar, R., D. Drolet, J.M. Ehrman & I. Kaczmarska. 2014 Motile gametes of the araphid diatom Tabularia fasciculata search randomly for mates. PLoS ONE 9: e101767.
Education
M.Sc. Jagellonian University (Krakow) Aquatic Biology
Ph.D. Jagellonian University (Krakow) Botany
Teaching
Undergraduate and Graduate Courses
Biol 4951 - Independent Study in Biology: ecology of marshland and mudflat diatoms.
Biol 4950 - Independent Study in Biology: ecology of marine diatoms and other protists.
Biol 4990 - Honours Thesis: reproductive biology of diatoms (see current projects below).
Biol 5393 - Graduate Level Topics in Biology: evolution and ecology of marine diatoms.