Cephalodiscus nigrescens is a sessile hemichordate belonging to the order Cephalodiscida.

Parasites The parasitic protozoan Neurosporidium cephalodisci has been found in the nervous system of Cephalodiscus nigrescens.Maletz, Jörg. (2017) Graptolite Paleobiology. Wiley-Blackwell.

References