North European specimens (type for species) may not be identical with Mediterranean forms - see Chisholm et al. (2001). [details]
Distinction from C. stossichi confirmed by Chisholm et al. (2001) using molecular evidence (rDNA ITS sequences). [details]
Status of species as distinct from C. palombi confirmed by Chisholm et al. (2001) using molecular evidence (rDNA ... [details]
Distinction from Calicotyle confirmed using molecules (rDNA ITS) by Chisholm et al. (2001). [details]