''Cephalodiscus nigrescens'' is a
sessile hemichordate
Hemichordata ( ) is a phylum which consists of triploblastic, eucoelomate, and bilaterally symmetrical marine deuterostome animals, generally considered the sister group of the echinoderms. They appear in the Lower or Middle Cambrian and incl ...
belonging to the order
Cephalodiscida.
Parasites
The parasitic
protozoa
Protozoa (: protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris. Historically ...
n ''
Neurosporidium cephalodisci'' has been found in the nervous system of ''Cephalodiscus nigrescens''.
[Maletz, Jörg. (2017) ''Graptolite Paleobiology''. Wiley-Blackwell. ]
References
nigrescens
Animals described in 1905
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