For the biomineralogy maniacs, I've just added 'Unnamed (Pb Oxalate)' (http://www.mindat.org/min-47701.html) and 'Unnamed (Pb Oxalate Dihydrate)' (http://www.mindat.org/min-47702.html) to the database. To be sure, these compounds are formed by Aspergillus niger, but during experimental solubilization of pyromorphite, so shan't rather be taken as serious minerals.
If someone is interested, there is a paper on geomycology: http://www.eko.uj.edu.pl/mycorrhiza/MKBL_2013/konw/07_geomycology.pdf
If someone is interested, there is a paper on geomycology: http://www.eko.uj.edu.pl/mycorrhiza/MKBL_2013/konw/07_geomycology.pdf