Video talks on 16S data analysis posted.

URMAP ultra-fast read mapper posted (paper).

~20% of taxonomy annotations in SILVA and Greengenes are wrong (paper).

Taxonomy prediction is <50% accurate for 16S V4 sequences (paper).

97% OTU threshold is wrong for species, should be 99% for full-length 16S, 100% V4 (paper).

sizein option

Count size annotations in input sequence labels towards cluster sizes. For example, an input sequence with size=4; in its label will add four to its cluster size rather than one. This provides a mechanism for propagating cluster sizes through multiple commands. See also -sizeout.