“…The most diverse genus within the subfamily is Cloacina, with more than 115 described species (Beveridge, 1998(Beveridge, , 2014Beveridge et al, 2014;. In addition to this morphological diversity, molecular analyses of Cloacina species have revealed extensive genetic variation within the genus, based on the characterization of the first and second internal transcribed spacers (ITS-1 and ITS-2 = ITS) of nuclear ribosomal DNA (rDNA) (Chilton et al, 2009;Shuttleworth et al, 2014). For example, Shuttleworth et al (2014) detected genetic variation within and among nine species of Cloacina from a single host, Wallabia bicolor, suggesting incipient speciation within the species studied.…”