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
Research interests
- Palynology
- Ultrastructure of plants
- X-Ray CT
- Flower-insect interactions
- pollination biology
Projects
- Scientific project collaborator FWF-Project P 34303-B "Flower Power: can in-situ pollen link fossil plants to floral visitors?" (Friðgeir Grímsson)
Curriculum Vitae
Current position
- 2022– PhD student/Scientific project collaborator (prae doc) FWF-Project P 34303-B
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
2025
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(15), Article s40529-025-00463-1. 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, XX, 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
Ulrich, S., Geier, C., Bouchal, J. M., Zetter, R., Schönenberger, J., Uhl, D., & Grimsson, F. (2024). Combined LM and EM investigations of pollen from compressed fossil flowers aid in their taxonomic assignment. In J. Bek, & J. Votočková Frojdová (Eds.), XV International Palynological Congress - XI International Organization of Palaeobotany Conference: Abstract Book (pp. 125-126). Article O-236 CZECH-IN s. r. o..
Till, A., Geier, C., Bouchal, J. M., Ulrich, S., Wedmann, S., Cantrill, D., & Grimsson, F. (2024). Did beetles visit Pseudanthus (Picrodendraceae) flowers in the Eocene of Europe? In J. Bek, & J. Votočková Frojdová (Eds.), XV International Palynological Congress - XI International Organization of Palaeobotany Conference: Abstract Book (pp. 132-133). Article O-248 CZECH-IN s. r. o..
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)