Beverley-Burton 1986. The taxonomic status of Actinocleidus Mueller, 1937; Anchoradiscus Mizelle, 1941; Clavunculus Mizelle et al, 1956; Anchoradiscoides Rogers, 1967; Syncleithrium Price, 1967 and Crinicleidus n. gen.: North American ancyrocephalids (Monogenea) with articulating haptoral bars. Journal of Parasitology, 72(1) 1986: 22-44