The snoRNAs U86, U56, U57 and HBII-55,of the C/D family, and the H/ACA box snoRNA ACA51 share the same host gene (NOL5A) with U86.
These snoRNAs, namely U86, U56, U57, and HBII-55 of the C/D family, along with the H/ACA box snoRNA ACA51, all stem from the same parent gene (NOL5A) that yields U86.