Christian Geier, BSc MSc

Scientific project collaborator (prae doc)
PhD Student
Ground floor, room 1
t: +43 (0)1 4277-540 00
m: christian.geier@univie.ac.at

 Title of the Doctoral Thesis

Flower-insect interactions in the Eocene to Oligocene of Central Europe

Media contributions

Research interests

  • Palynology
  • Ultrastructure of plants
  • X-Ray CT
  • Flower-insect interactions
  • pollination biology

 Curriculum Vitae

Current position

Education and scientific career

  • 2022– PhD Biology
  • 2022 Master's Theses "The late middle Miocene palynoflora of Gratkorn, Styria, Austria"
  • 2021 Student project collaborator FWF-Project P 29501-B25
  • 2020–2022 Master's Programme Botany, University of Vienna
  • 2016–2020 Bachelor's in biology with specialization in botany, University of Vienna (Thesis: Investigations to the distribution of Microthlaspi erraticum and Microthlaspi perfoliatum in eastern Austria using ITS based phylogeny)

 Publications

Showing entries 1 - 20 out of 39

2026

Ulrich, S., Purgina, C., Bouchal, J. M., Geier, C., & Grimsson, F. (2026). The use of transmission electron microscopy when investigating fossil angiosperm pollen: A review and suggestions for future applications. Review of Palaeobotany and Palynology, 344, Article 105423. https://doi.org/10.1016/j.revpalbo.2025.105423

2025

Geier, C., Engel, M. S., Bouchal, J. M., Ulrich, S., Schönenberger, J., Uhl, D., Wappler, T., Wedmann, S., Boudet, L., & Grimsson, F. (2025). 24 million years of pollination interaction between European linden flowers and bumble bees. New Phytologist, 248(4), 2111-2127. https://doi.org/10.1111/nph.70531
Bouchal, J. M., Geier, C., Ulrich, S., Wilde, V., Lenz, O. K., Zetter, R., & Grimsson, F. (2025). Qualitative LM and SEM study of the Messel palynoflora: Part II. Fabales to Caryophyllales. Review of Palaeobotany and Palynology, 341, Article 105349. https://doi.org/10.1016/j.revpalbo.2025.105349
Geier, C., Ulrich, S., Bouchal, J. M., Zetter, R., Ngô Muller, V., Jacobs, B. F., Uhl, D., & Grimsson, F. (2025). Morphology and ultrastructure of Tilioideae pollen: how to differentiate Craigia, Mortoniodendron, and Tilia. Botanical studies, 66(1), Article 15. https://doi.org/10.1186/s40529-025-00463-1
Pan, A. D., Jacobs, B. F., Currano, E. D., Gostel, M. R., Lowry, II, P. P., Plunkett, G. M., Hoffmann, J., Geier, C., & Grimsson, F. (2025). Fossil Astropanax Seem. (Araliaceae) from the early Miocene (21.73 Mya) Mush Valley plant assemblages of Ethiopia. Botanical Journal of the Linnean Society, 209(3), 280-302. Article boaf011. https://doi.org/10.1093/botlinnean/boaf011
Geier, C., Bouchal, J. M., Ulrich, S., & Grimsson, F. (2025). Identifying Tilioideae pollen in the fossil record using electron microscopy. In Abstract EGU25 Article EGU25-17212 https://doi.org/10.5194/egusphere-egu25-17212

2024

Grimsson, F., Geier, C., Bouchal, J. M., Ulrich, S., Zetter, R., & Vieira, M. (2024). Fossil Hyaenanche Pollen from the Eocene of Kenya: The Paleophytogeograpy and Paleoclimate of a Relict Plant Genus Endemic to the Cape Province, South Africa. Biology, 13(12), Article 1079. https://doi.org/10.3390/biology13121079
Wuttke, M., Poschmann, M. J., Wappler, T., Bouchal, J. M., Geier, C., Ulrich, S., & Grimsson, F. (2024). Pollen-feeding in a giant pelobatid tadpole from the late Oligocene of Enspel, Germany. Palaeobiodiversity and Palaeoenvironments, 104(4), 999-1026. Article 104831. https://doi.org/10.1007/s12549-024-00603-8
Geier, C., Engel, M. S., Bouchal, J. M., Ulrich, S., Grimsson, F., Wedmann, S., & Wappler, T. (2024). The earliest large carpenter bee (Xylocopa) and its adhering pollen (Araliaceae, Theaceae). Palaeobiodiversity and Palaeoenvironments, 104(4), 949-962. Article s12549-024-00604-7. https://doi.org/10.1007/s12549-024-00604-7
Geier, C., Bouchal, J. M., Ulrich, S., Uhl, D., Wappler, T., Wedmann, S., Zetter, R., Schönenberger, J., & Grimsson, F. (2024). Potential pollinators and paleoecological aspects of Eocene Ludwigia (Onagraceae) from Eckfeld, Germany. Palaeoworld, 33(4), 1079-1104. https://doi.org/10.1016/j.palwor.2023.07.003
Auer, W., Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia americana. Web publication https://www.paldat.org/pub/Tilia_americana/306663
Ulrich, S., Vieira, M., Coiro, M., Bouchal, J. M., Geier, C., Jacobs, B. F., Currano, E. D., Lenz, O. K., Wilde, V., Zetter, R., & Grimsson, F. (2024). Origin and Early Evolution of Hydrocharitaceae and the Ancestral Role of Stratiotes. Plants, 13(7), Article 1008. https://doi.org/10.3390/plants13071008
Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia chinensis. Web publication https://www.paldat.org/pub/Tilia_chinensis/306674
Halbritter, H., Heigl, H., Auer, W., Gastaldi, C., Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia cordata. Web publication https://www.paldat.org/pub/Tilia_cordata/306671
Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia endochrysea. Web publication https://www.paldat.org/pub/Tilia_endochrysea/306676
Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia miqueliana. Web publication https://www.paldat.org/pub/Tilia_miqueliana/306675
Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia mongolica. Web publication https://www.paldat.org/pub/Tilia_mongolica/306670
Halbritter, H., Hesse, M., Heigl, H., Auer, W., Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia platyphyllos. Web publication https://www.paldat.org/pub/Tilia_platyphyllos/306672
Sam, S., Heigl, H., Auer, W., Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia tomentosa. Web publication https://www.paldat.org/pub/Tilia_tomentosa/306673
Geier, C., Bouchal, J. M., & Grimsson, F. (2024). Tilia japonica. Web publication https://www.paldat.org/pub/Tilia_japonica/306664
Showing entries 1 - 20 out of 39

Geier, C. (2022) The late middle Miocene palynoflora of Gratkorn, Styria, Austria. University of Vienna (Masterthesis)

Geier, C. (2020) Investigations to the distribution of Microthlaspi erraticum and Microthlaspi perfoliatum in eastern Austria using ITS based phylogeny. University of Vienna (Bachelorthesis)