miRNA families that are unique for Anura:

miR-1504	mir-2238	miR-4072	mir-2964	miR-216b*
miR-31b	miR-1650	miR-1933	miR-4318	miR-2904
mir-2253	mir-427	miR-2292	miR-427	miR-1632
miR-1175