fxSi9 [synthetic guide site1::3'(delta)HygR::unc-54 3' UTR::LoxN (I:2851003)]. fxSi9 is a CRISPR-engineered site in the MY16 background for future transgene insertion via CRISPR utilizing a synthetic guide site (GTTTGAGTAGAGCACTCAGGAGG) with a split hygromycin resistance selection marker; fxSi9 also introduced a small deletion of genomic sequence at the insertion site (I:2851004-2851014).