[2] The National Center for Biotechnology Information does not indicate that any phylogenetic analysis has been published on any Cathayacanthus species that would confirm its position as a unique order in the class Rhadinorhynchidae.

[3] The species Cathayacanthus bagarii Moravec & Sey, 1989 was removed from the genus due to the presence of four tubular cement glands.

[2] The genus Cathayacanthus contains two species:[1] C. spinitruncatus was found infesting the Common ponyfish (Leiognathus equulus) in Hai Phong and Nha Trang in Vietnam and from the Yellowspotted ponyfish (Nuchequula flavaxilla) in Quang Ninh in the Pacific Ocean off the coast of Vietnam.

This stage involves penetrating the wall of the mesenteron or the intestine of the intermediate host and growing.

There are no reported cases of Cathayacanthus infesting humans in the English language medical literature.