Keywords

  • angiosperms
  • biomedicinals
  • floral evolution
  • phylogenetics
  • plant evolution
  • plant evolution phylogenetics systematics genomics
  • plant systematics
  • pollination
  • timing

Crepet, William Louis

Professor
As Department Chair I am particularly interested in developing departmental preeminence in basic plant biology at a time when progress in basic plant biology research is important to critical societal needs including: the development of strategic responses to the effects of to climatic change in vital areas including biodiversity maintenance and agriculture; the development of biomedicinals, and investigations of plant based energy sources. My immediate goal has been to build strength in various facets of plant molecular biology while complementing these developments with complementary strength in the area of plant systematics including theory and molecular systematics. These emphases will be enhanced by another immediate priority, cultivating the kind of research relationships with other Cornell administrative units that will promote and enhance our research eminence by allowing the Department to enter exciting and important areas of research that would be difficult to engage in in the absence of such collaborations or where synergies derived from these collaborations materially improve the Department’s and University’s positions in these key areas of research.

research

research and scholarship focus

With respect to my own research, my focus is on establishing an accurate fossil record for the flowering plants that includes reliable floral evidence. This approach is unique and informative due to the nature of flowers, their information content and adaptive significance. Such a record has implications for molecular evolution, hyper radiations characteristic of the angiosperms and for evaluating ecological-evolutionary hypotheses invoked to explain angiosperm dominance of modern ecosystems. Such research has implications for systematics/systematics methodologies and for the evaluation of molecular clock based timing models.

primary investigator of

research areas

affiliations

head of

faculty appointment in

administrative appointment

member of graduate field

teaching

teaching focus

My focus is on teaching modern approach to the plant fossil record that includes exciting new information from the fossil record, the interfaces between fossil evidence and recent developments in systematics and molecular biology, and how the latest techniques are improving the quality of information available from the fossil record. The ultimate focus is on the fossil record and its significance/implications. As a department chair, my interest is on increasing the visibility of plant related courses and attracting more undergraduates to these courses.

service

outreach focus

My focus is on assisting in establishing the web based equivalents of the widely used horticultural publications Hortus and Bailey`s Manual. These publications have significance that goes beyond the practicalities of horticulture in NYS and includes biodiversity characterization important in identifying species distribution changes that might be related to climate change, invasive plant species etc.. The web based equivalents will have much more information than was available in the original publications and be structured to provide relevant information to a broader constituency.

event host

publications

selected publications (listing in progress)

  • Crepet, W.L., K. C. Nixon, and M.A. Gandolfo, 2005. An extinct calycanthoid taxon, Jerseyanthus calycanthoides, from the Late Cretaceous of New Jersey. American Journal of Botany 92 (9): 1475–1485.
  • Crepet, W.L., K. C. Nixon, and M.A. Gandolfo, 2004. Fossil evidence and phylogeny: the age of major angiosperm clades based on mesofossil and macrofossil evidence from Cretaceous deposits. American Journal of Botany 91 (10): 1666–1682.
  • Gandolfo, M.A., K.C. Nixon, and W.L. Crepet. 2004. The oldest complete fossil flowers of Nymphaeaceae and implications for the complex insect entrapment pollination mechanisms in Early Angiosperms. Proceedings of the National Academy of Sciences USA 101 (21): 8056-8060.
  • Hermsen, E.J., M.A. Gandolfo, K. C. Nixon, and W. L. Crepet. 2003 Divisestylus gen. nov. (aff. Iteaceae), a fossil saxifrage from the Late Cretaceous of New Jersey, USA. American Journal of Botany 90 (9): 1373-1388.
Keywords: angiosperms, biomedicinals, floral evolution, phylogenetics, plant evolution, plant evolution phylogenetics systematics genomics, plant systematics, pollination, timing