Molecular analysis of the genera Hapalotrema Looss, 1899 and Learedius Price, 1934 (Digenea: Spirorchiidae) reveals potential cryptic species, with comments on the validity of the genus Learedius - Chapman, P. A.; Cribb, T. H.; Blair, D.; Traub, R. J.; Kyaw-Tanner, M. T.; Flint, M.; Mills, P. C. (Systematic Parasitology, 2015)