There are a number of websites in Oxford and elsewhere in the world, on Agathis and on systematics, evolution and conservation of conifers more generally, that may well be of interest: here is a small but growing selection:
Daubeny Herbarium (Oxford’s current research herbarium)
ARAU mailing list for Araucariaceae genetics and systematics (which I administer)
Centre IRD, Nouméa (there seems to be a problem with this site presently, but hopefully this is only temporary)
Porter P. Lowry II’s website at Missouri Botanical Gardens
Gymnosperm Database, University of Bonn
ForestryGuide, Göttingen State and University Library
ENDEMIA website on the flora and fauna of New Caledonia
Link to Trevor Whiffins page (more Agathis research)
Araucariaceae rbcL phylogeny: Setogouchi, H., Osawa, T. A., Pintaud, J.-C. Jaffré, T. & Veillon, J.-M. (1998). Phylogenetic relationships within Araucariaceae based on rbcL gene sequences. American Journal of Botany 85 (11) 1507-1516.
If you know of a site that you think should be on this list, then please send me the details and I will try to add it.