[galaxy-dev] Blast+: new feature filter/mask... by taxid before job in one task

Hi guys, We recently installed NCBI BLAST + to our local Galaxy instance and now we need to provide the possibility to filter/mask ... by taxon id (taxid) using the command line option (-window_masker_taxid) of BLAST (cf. http://www.ncbi.nlm.nih.gov/books/NBK1763/) before the job will be performed in one task. However searching in the documentation and the mailing list, I did not find anything about this. So it would be great to provide the possibility to subselect by taxid (e.g. NCBI BLAST server http://blast.ncbi.nlm.nih.gov/Blast.cgi) by changing the BLAST integration. We believe this could be of common interest. It would be great if anybody could comment on this. Thanks a lot, Thomas