Small RNA Regulatory Pathways. Schematic and functional categories as known from mechanistic studies in model organisms. The number of homologs for each mosquito species is compared to those of D. melanogaster. "*", the Rm62-like RNA helicase family is large and complex in diptera; only DmeRm62, NM_169118, has been associated with RNA interference. The PIWI pathway model was adapted from previously published diagrams [35, 94].