''Hemiarthrum setulosum'' is a
species of
chiton
Chitons () are marine molluscs of varying size in the class Polyplacophora (), formerly known as Amphineura. About 940 extant and 430 fossil species are recognized.
They are also sometimes known as gumboots or sea cradles or coat-of-mail s ...
in the
family Hanleyidae
''Hanleya'' is a genus of chiton, polyplacophoran molluscs known from Oligocene and Miocene fossils; it is represented today by a number of species including ''Hanleya sinica, H. sinica'' Xu 1990 (China), ''Hanleya brachyplax, H. brachyplax'' (B ...
, the only member of the
genus ''Hemiarthrum''.
Hemiarthrum setulosum represent one of the five major clades of chitons that are living. Hemiarthrim setulosum has an incomplete lateral tract in the nerve ring. They are the only known species to have an incomplete one.
[Sumner‐Rooney, Lauren, and Julia D. Sigwart. "Do chitons have a brain? New evidence for diversity and complexity in the polyplacophoran central nervous system." Journal of morphology 279.7 (2018): 936-949.]
References
Hanleyidae
Monotypic mollusc genera
{{Chiton-stub