Hemiarthrum

Hemiarthrum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Polyplacophora
Order:	Chitonida
Family:	Hemiarthrumidae
Genus:	Hemiarthrum Carpenter in Dall, 1876
Species:	H. setulosum
Binomial name
Hemiarthrum setulosum Carpenter in Dall, 1876
Synonyms
Acanthochiton couthouyiRochebrune, 1889 (junior subjective synonym) Acanthochiton stygmaRochebrune, 1889 (uncertain synonym) Chiton castaneusA. Gould, 1852 (invalid: junior primary homonym of Chiton castaneusW. Wood, 1815) Hemiarthrum hamiltonorum Iredale & Hull, 1932 Hemiarthrum setulosum Powell, 1957

Hemiarthrum setulosum is a species of chiton in the family Hemiarthrumidae, ^[1] and the only member of the genus Hemiarthrum. It was previously assigned to the family Hanleyidae. ^[2]

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. ^[3]

Synonym

• Hemiarthrum hamiltonorumIredale & Hull, 1932: synonym of Hemiarthrum setulosumP. P. Carpenter [in Dall], 1876 (junior subjective synonym)

Distribution

This species occurs off the Kerguelen Islands and Cape Horn.

References

1. "Opinion 2514 (Case 3820) – Hemiarthridae Sirenko, 1997 (Mollusca, Polyplacophora): emended to Hemiarthrumidae to remove homonymy with Hemiarthrinae Markham, 1972 (Arthropoda, Malacostraca)". The Bulletin of Zoological Nomenclature. 81 (1): 164–166. December 2024. doi:10.21805/bzn.v81.a037.
2. Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN   0-00-216906-1
3. 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.

• Rochebrune, A.-T., 1889 - Polyplacophores. In Rochebrune, A.T. & Mabille, J., Mission Scientifique du Cap Horn, vol. 6, part. Zoologie, p. 131-143, pl9
• Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch

External links

• Dall, W. H. (1876). Mollusks. In: J.H. Kidder, Contributions to the natural history of Kerguelen Island, made in connection with the United States "Transit-of-Venus" Expedition, 1874-1875, II. Bulletin of the United States National Museum. 3: pp. 42–48