Bathynotus

Bathynotus; Temporal range: 517 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ late Botomian
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Redlichiida
Suborder:	Bathynotina
Family:	Bathynotidae
Genus:	Bathynotus; Hall, 1860.
Species
	B. holopygus (Hall, 1859) (Type); B. elongatus Zhao, Gong & Wang, 1987; B. kueichouensis Lu in Wang et al, 1964;

Bathynotus is a genus of trilobites of the family Bathynotidae. Its fossils have been found in the paleocontinents Laurentia (specifically in what are now Nevada and Vermont), Gondwana (in South China and South-Australia), and - doubtfully - Siberia. It is characterized by a very wide axis in the thorax and an enlarged 11th segment that bears a long, backwardly directed spine on each side. Additionally, the 12th and 13th segments are narrow and fuse with the edge of the spine of the 11th segment.^[2]

Etymology

Bathynotus is derived from the Greek words βαθυς -bathus- meaning "ample"; and νοτος -notos- meaning "back", for the very wide axis of the thorax. The species names are derived as follows.

elongatus means lengthened, for the greater body length of this species.
holopygus means entire shield, for the pygidium that has a smooth border.
kueichoensis comes from Kweichow (now Guizhou Province) in China where this species was collected.

References

^ Hall (1860). "Contributions to Palaeontology 1858-1859". Thirteenth Annual Report of the New York State Cabinet of Natural History: 117–119.
^ ^a ^b ^c ^d Peng, Jin; Zhao, Yuanlong; Yuan, Jinliang; Yao, Lu; Yang, Hong (2009). "Bathynotus: A key trilobite taxon for global stratigraphic boundary correlation between Cambrian Series 2 and Cambrian Series 3". Progress in Natural Science. 19: 99–105. doi:10.1016/j.pnsc.2008.03.034.
^ Hall (1859). "Contributions to Palaeontology of New York; being some of the results of the Investigations made during the years 1855, 1856, 1857 and 1858". Twelfth Annual Report of the New York State Cabinet of Natural History: 61.

External links

Discussion of the taxonomic position of Bathynotus

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[Hall_1860-1] Hall (1860). "Contributions to Palaeontology 1858-1859". Thirteenth Annual Report of the New York State Cabinet of Natural History: 117–119.

[Peng_et_al.-2] Peng, Jin; Zhao, Yuanlong; Yuan, Jinliang; Yao, Lu; Yang, Hong (2009). "Bathynotus: A key trilobite taxon for global stratigraphic boundary correlation between Cambrian Series 2 and Cambrian Series 3". Progress in Natural Science. 19: 99–105. doi:10.1016/j.pnsc.2008.03.034.

[Hall_1859-3] Hall (1859). "Contributions to Palaeontology of New York; being some of the results of the Investigations made during the years 1855, 1856, 1857 and 1858". Twelfth Annual Report of the New York State Cabinet of Natural History: 61.

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