Jasus

Jasus is a genus of spiny lobsters which live in the oceans of the Southern Hemisphere.^[2] They have two distinct "horns" projecting from the front of the carapace, but lack the stridulating organs present in almost all other genera of spiny lobsters.^[2] Like all spiny lobsters, they lack claws, and have long stout antennae which are quite flexible.^[2]

Jasus Temporal range: Miocene–Recent PreꞒ Ꞓ O S D C P T J K Pg N
Jasus edwardsii
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Family:	Palinuridae
Genus:	Jasus Parker, 1883 [1]
Type species
Palinurus lalandii H. Milne-Edwards, 1837

The generic name Jasus is derived from the Ancient Greek town of Iasos (on the Mediterranean Sea, located in modern Turkey), which was famous for its prawns and stamped them on some of its coins.^[3][4][5]

Species

The following species are included in the genus Jasus:^[6]

Image	Scientific name	Distribution
	Jasus caveorum Webber & Booth, 1995	southeastern Pacific Ocean
	Jasus edwardsii (Hutton, 1875)	Southern Australia: Western Australia to New South Wales & Tasmania. South Island of New Zealand
	Jasus frontalis (H. Milne-Edwards, 1837)	Juan Fernández Islands, Islas Desventuradas
	Jasus lalandii (H. Milne-Edwards, 1837)	Southern Africa (Namibia to Algoa Bay, South Africa
	Jasus paulensis (Heller, 1862)	St. Paul Island and Amsterdam Island
	Jasus tristani Holthuis, 1963	Tristan da Cunha archipelago; Vema seamount

Another species, formerly known as "Jasus verreauxi" is found around New Zealand (especially the North Island), the Chatham Islands, and around Australia (Queensland to Victoria and Tasmania); it is now placed in the genus Sagmariasus.

Approximate distributions of the extant species of Jasus, after Phillips (2006).^[7]
Orange: J. caveorum; pink: J. frontalis; red: J. tristani; yellow: J. lalandii; blue: J. paulensis; green: J. edwardsii

Fossils

• †Jasus jlemingi Glaessner, 1960 - a Miocene fossil from New Zealand ^[8]

Fisheries

Most of the extant species are liable to commercial exploitation, with the majority of the A$4.6 million New South Wales lobster fishery industry being based on J. edwardsii and the closely related Sagmariasus verreauxi.^[9] Jasus lalandii is the most important commercial rock lobster in southern Africa.^[10]

References

1. T. Jeffery Parker (1883). "On the structure of the head in Palinurus, with especial reference to the classification of the genus" (PDF). Transactions and Proceedings of the Royal Society of New Zealand. 16: 297–307.
2. Lipke Holthuis (1991). Marine lobsters of the world. Food and Agriculture Organization. ISBN 92-5-103027-8. Archived from the original on 2008-04-21. Retrieved 2007-07-04.
3. Konuk, Koray (January 22, 2019). Bremen Riet, Carbon Jan-Mathieu van (ed.). Hellenistic Karia. Ausonius Éditions. pp. 59–67. ISBN 9782356132833 – via OpenEdition Books.
4. "Definition of JASUS". www.merriam-webster.com.
5. "The Numismatic Chronicle". Royal Numismatic Society. November 18, 2007 – via Google Books.
6. Tin-Yam Chan (2010). "Jasus Parker, 1883". WoRMS. World Register of Marine Species. Retrieved December 10, 2011.
7. Bruce F. Phillips (2006). Lobsters: Biology, Management, Aquaculture and Fisheries. John Wiley & Sons. p. 236. ISBN 978-1-4051-2657-1.
8. R. W. George & A. R. Main (1967). "The evolution of spiny lobsters (Palinuridae): a study of evolution in the marine environment". Evolution. 21 (4): 803–820. doi:10.2307/2406775. JSTOR 2406775. PMID 28563070.
9. "Lobster fishery". New South Wales Department of Primary Industries. June 27, 2007. Archived from the original on July 3, 2007.
10. "Rock lobster Jasus lalandii". knet.co.za. Archived from the original on October 20, 2007. Retrieved July 4, 2007.

External links

• Data related to Jasus at Wikispecies