Burnham, R.J.
- Evolutionary paleobotany, University of Michigan.
- http://www.geo.lsa.umich.edu/dept/faculty/burnham/index.html

Rothwell, G.W.
- Fossil and living land plant phylogeny and evolution, Ohio University.
- http://oak.cats.ohiou.edu/~rothwell/

Marlow, M.G.
- Palynology, Simon Fraser University.
- http://www.sfu.ca/~mpellatt/marlow.htm

Arens, N.C.
- Paleobotany, University of California-Berkeley.
- http://www.ucmp.berkeley.edu/people/nan/nan.html