shortspine spurdog
{{Short description|Species of shark}}
{{speciesbox
| name = Shortspine spurdog
| image = Fish4474 - Flickr - NOAA Photo Library.jpg
| status = EN
| status_system = IUCN3.1
| genus = Squalus
| species = mitsukurii
| range_map = Squalus mitsukurii distmap.png
| range_map_caption = Range of the shortspine spurdog
| authority = D. S. Jordan & Snyder, 1903
| synonyms = Squalus acutirostris Chu, Meng & Li, 1984
}}
The shortspine spurdog (Squalus mitsukurii) is a dogfish, a member of the family Squalidae, found on continental shelves off Japan in temperate waters, from the surface to 950 m. Its length is up to 75 cm.{{FishBase| genus = Squalus | species = mitsukurii | month = July | year = 2006}}
Taxonomy
The shortspine dogfish was once seen as a circumglobal species by many authors, including Compagno (1984) and Last & Stevens (1994).Compagno, L.J.V., 1984 FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO.Last, P.R. and J.D. Stevens, 1994 Sharks and rays of Australia. CSIRO, Australia. 513 p. However, a series on papers published since 2007 have shown that a number of species synonymized with S. mitsukurii are distinct, and that the Hawaiian population of S. mitsukurii represent a distinct species, the Hawaiian spurdog.Last, P.R., White, W.T. and Motomura, H. 2007. Description of Squalus chloroculus sp. nov., a new spurdog from southern Australia, and the resurrection of S. montalbani Whitley. In: P.R Last, W.T. White and J.J. Pogonoski (eds) (eds), Descriptions of New Dogfishes of the genus Squalus (Squaloidea: Squalidae), pp: 55‒69. CSIRO, Australia.Duffy, C.A.J. and P.R. Last, 2007. Redescription of the northern spiny dogfish Squalus griffini Phillipps, 1931 from New Zealand. pp. 91-100. In P.R. Last, W.T. White and J.J. Pogonoski Descriptions of new dogfishes of the genus Squalus (Squaloidea: Squalidae). CSIRO Marine and Atmospheric Research Paper No. 014. 130 pp.Daly-Engel TS, Koch A, Anderson JM, Cotton CF, Grubbs RD (2018) Description of a new deep-water dogfish shark from Hawaii, with comments on the Squalus mitsukurii species complex in the West Pacific. ZooKeys 798: 135-157. https://doi.org/10.3897/zookeys.798.28375
HutoTZ.jpg|Head
Squalus mitsukurii jaws.jpg|Jaws
Squalus mitsukurii upper teeth.jpg|Upper teeth
Squalus mitsukurii lower teeth.jpg|Lower teeth
References
{{Commons category|Squalus mitsukurii}}
{{reflist}}
{{Selachimorpha|S.}}
{{Taxonbar|from=Q2314437}}
{{DEFAULTSORT:Shortspine spurdog}}