“…It is thought that genome architecture in Chromadorea is more stable, having only a few differences in the NCRs (Gissi et al, 2008), e.g., two congeneric species of Caenorhabditis differ only in the number and size of NCRs. Similarly, identical gene arrangement among congeneric species has been reported in two species each of Ancylostoma (Hu et al, 2002;Jex et al, 2009), Metastrongylus (Jex et al, 2010), Trichostrongylus (Jex et al, 2010), Oesophagostomum (Lin et al, 2012), Ascaris (Liu et al, 2012b), Onchocerca (Keddie et al, 1998;McNulty et al, 2012), Bursaphelenchus (Sultana et al, 2013a), Bunostomum (Gao et al, 2014), three species each of Angiostrongylus (Lv et al, 2012;Gasser et al, 2012), Toxocara (Li et al, 2008), Ascaridia (Liu et al, 2013) and four species of Baylisascaris (Xie et al, 2011a,b).…”