Fig. 1
From: Genome-wide survey of miRNAs and their evolutionary history in the ascidian, Halocynthia roretzi
Phylogenic survey of the conserved H. roretzi miRNAs in other species. Red squares indicate that the miRNA exists in the corresponding species, Light blue square indicates that the miRNAs has not been reported in the species. 13 highly conserved families (miR-1, miR-15, miR-78, miR-101, miR-125, miR-132, miR-141 (miR-8), miR-155, miR-181, miR-199, miR-375, miR-672 and miR-1473) that were detected in C. robusta were not found in H. roretzi via our method. These miRNAs may exist in H. roretzi, without satisfying the stringent filtering criteria we applied. Alternatively, they may have been lost in the H. roretzi lineage. See details of species names in Additional file 2