Temporal range: Miocene–Recent
Parker, 1883 
H. Milne-Edwards, 1837
Jasus is a genus of spiny lobsters which live in the oceans of the Southern Hemisphere. 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. Like all spiny lobsters, they lack claws, and have long stout antennae which are quite flexible.
The following species are included in the genus Jasus:
- Jasus caveorum Webber & Booth, 1995
- 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 jlemingi Glaessner, 1960 – a Miocene fossil from New Zealand 
- 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.
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. Jasus lalandii is the most important commercial rock lobster in southern Africa.
- 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.
- Lipke Holthuis (1991). Marine lobsters of the world. Food and Agriculture Organization. ISBN 92-5-103027-8.
- Tin-Yam Chan (2010). "Jasus Parker, 1883". World Register of Marine Species. Retrieved December 10, 2011.
- 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. JSTOR 2406775. doi:10.2307/2406775.
- Bruce F. Phillips (2006). Lobsters: Biology, Management, Aquaculture and Fisheries. John Wiley & Sons. p. 236. ISBN 978-1-4051-2657-1.
- "Lobster fishery". New South Wales Department of Primary Industries. June 27, 2007. Archived from the original on July 3, 2007.
- "Rock lobster Jasus lalandii". knet.co.za. Archived from the original on October 20, 2007. Retrieved July 4, 2007.
- Data related to Jasus at Wikispecies