miRNA families that are unique for Strongylocentrotidae:

miR-4145	miR-1658	miR-694	mir-933	miR-2399
miR-2886	miR-1342	miR-2500	mir-982	miR-4006a

miRNEST miRNAs belonging to family miR-2399:

mature miRNA	miRNEST id
TTATCTGTAGCTGTTGGAACA	MNEST008613