“…These structures have received substantial interest in the past, as explified by the following non-exhaustive list of references covering a diverse set of animal species: Homo sapiens U1 [54], U2 [25], U4 [37], U5 [6,79], U6 [25], U11 [66,51,82], U12 [66,51,82] and U4atac [72], Rattus norvegicus U1 [37], U4 [37], U5 [37], Gallus gallus U4 [37], U5 [6], Xenopus laevis U1 [18], U2 [47], Caenorhabditis elegans U1, U2, U5, U4/U6 [84], Drosophila melanogaster U1 [54,56], U2 [56], U4 [56], U5 [56], U4atac/U6atac, U6atac/U12 [59], Bombyx mori U1 [76], U2 [75], Asselus aquaticus U1 [3], Ascaris lumbricoides U1, U2, U5, U4/U6 [70]. Large changes in snRNA structures over evolutionary time were recently reported for hemiascomycetous yeasts [50].…”