{{Short description|Species of shark}} {{Speciesbox | name = Hooktooth dogfish | image = Hooktooth dogfish.gif | status = NT | status_system = IUCN3.1 | genus = Aculeola | parent_authority = F. de Buen, 1959 | species = nigra | range_map = Aculeola nigra distmap.png | range_map_caption = Range of hooktooth dogfish (in blue) | authority = F. de Buen, 1959 | status_ref = <ref name="iucn status 19 November 2021">{{cite iucn |author=Ebert, D.A. |author2=Concha, F. |author3=Acuña, E. |author4=Herman, K. |author5=Kyne, P.M. |date=2020 |title=''Aculeola nigra'' |volume=2020 |article-number=e.T44653A124437350 |doi=10.2305/IUCN.UK.2020-3.RLTS.T44653A124437350.en |access-date=19 November 2021}}</ref> }} {{Portal|Sharks}}
The '''hooktooth dogfish''', ''Aculeola nigra'', is a small, little-known dogfish, the only member of the genus ''Aculeola''.
The type specimen is held at the National Natural History Museum, Santiago, Chile.
==Description== The hooktooth dogfish has a blunt, flattened snout, very large eyes, a relatively long distance from the eye to the first gill slit, small grooved dorsal spines, a first dorsal fin about halfway between the pectoral and pelvic fins, and a broad caudal fin. They are black with a maximum length of only 60 cm.
==Distribution== They are found in the eastern South Pacific along the coast of South America from Peru to central Chile.
==Habits and habitat== This shark is a little-known, yet common, shark that lives at depths between 110 and 560 m. They are ovoviviparous, with at least three pups per litter. They probably eat bony fish and invertebrates.
==References== {{Reflist}} * {{cite iucn|author=Ebert, D.A., Concha, F., Acuña, E., Herman, K. & Kyne, P.M.|name-list-style=amp|year=2020|url=https://www.iucnredlist.org/species/44653/124437350|title=''Aculeola nigra''|access-date=16 January 2021}} * FAO Species Catalogue, Volume 4, Parts 1 and 2: Sharks of the World
==External links== * [http://shark-references.com/species/view/Aculeola-nigra Species Description of Aculeola nigra at www.shark-references.com]
{{Selachimorpha|D.}} {{Taxonbar|from=Q2601373}}
{{DEFAULTSORT:Hooktooth dogfish}} Category:Etmopteridae Category:Fish described in 1959