{{Short description|Family of gastropods}} {{Automatic taxobox | name = Acteonidae | image = Acteon tornatilis 2.png | image_caption = dorsal view of a live ''Acteon tornatilis'' | taxon = Acteonidae | authority = d'Orbigny, 1843 | type_genus = ''Acteon'' | type_genus_authority = d'Orbigny, 1843 | synonyms_ref= <ref name="WoRMS" /> | synonyms= * Pupidae * Solidulidae * Tornatellidae }}
'''Acteonidae''', common name the "'''barrel bubble snails'''", is a family of small sea snails, marine gastropod mollusks of the informal group Lower Heterobranchia.<ref name="WoRMS">Bouchet, P. (2012). Acteonidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=155 on 2012-08-04</ref>
==Shell description== The shell is usually smaller than 25 mm.<ref name="AB">[http://www.animalbase.uni-goettingen.de/zooweb/servlet/AnimalBase/home/family?id=155 "Family summary for Acteonidae"]. AnimalBase, last change 25-10-2007, accessed 3 August 2010</ref> The shell of these sand-dwelling micromollusks is small, but it is large enough to house the retracted soft parts including the entire mantle.
The aperture is elongated.<ref name="AB"/> The narrow shell aperture, which is ovate and pointed on the top, can be closed with a corneous operculum.
The thick shell is oviform to fusiform, with a short (sometimes sunken) conical apex. They have spiral sculpturing. The elongated aperture opens up from narrow at the posterior notch to enlarged at the base. The base of the columella has several characteristic plaits.
==Anatomy== The radula has no central tooth, and there are five or six laterals on each side. The teeth are very similar in shape and size across the radula, which is specialised for a diet of polychaete worms.
The eggs are enclosed in a long, gelatinous mass, which is attached to the substrate with a short stalk.
The foot is with operculum.<ref name="AB"/>
== Ecology == Acteonidae occur in warm seas in shallow and deep water.<ref name="AB"/>
Animals predate polychaetes.<ref name="AB"/>
==Genera== Genera within the family Acteonidae include:
Genus ''Acteon'' <small>Montfort, 1810</small> - type genus
† Genus ''Acteonina'' <small>d'Orbigny, 1850</small>
Genus ''Bathyacteon'' <small>Valdés, 2008</small>
Genus ''Callostracon'' <small>Repetto & Bianco, 2012</small>
† Genus ''Colostracon'' <small>Hamlin, 1884</small>
Genus ''Crenilabium'' <small>Cossmann, 1889</small>
Genus ''Inopinodon'' <small>Bouchet, 1975</small>
Genus ''Japonactaeon'' <small>Taki, 1956</small>
Genus ''Lanayrella'' <small>Salvador & C. Cunha, 2020</small>
Genus ''Liocarenus'' <small>Harris & Burrows, 1891</small> * ''Liocarenus globulinus'' Forbes, 1844 ** Distribution : Atlantic, Mediterranean
Genus ''Lissacteon'' <small>Monterosato, 1890</small>
Genus ''Maxacteon'' <small>Rudman, 1971</small> [[File:Acteon fabreanus 002.jpg|thumb|shell of ''Maxacteon fabreanus'']]
Genus ''Mysouffa'' <small>Marcus, 1974</small> * ''Mysouffa cumingii'' (= ''Acteon mysouffa cumingii'') (A. Adams, 1855) ** Distribution : Florida, Brazil ** Length : 20 mm * ''Mysouffa turrita'' (Watson, 1883) ** Distribution : Jamaica, Cuba, Caribbean ** Length : 14 mm ** Description : found at depths of around 700 m
Genus ''Neactaeonina'' <small>Thiele, 1912</small>
Genus ''Obrussena'' <small>Iredale, 1930</small> * ''Obrussena bracteata'' Iredale, 1930 ** Distribution : Australia * ''Obrussena moeshimaensis'' T. Habe, 1952 ** Distribution : Japan
Genus ''Ongleya'' <small>Finlay & Marwick, 1937</small>
Genus ''Ovulacteon'' <small>Dall, 1889</small> * ''Ovulacteon meekii'' Dall, 1889 ** Distribution : Cuba, Bahamas, East Brazil ** Length : 5.5 mm ** Description : found at depths of 360 to 820 m
Genus ''Pseudactaeon'' <small>Thiele, 1925.</small> * ''Pseudactaeon albus'' Sowerby III, 1873 ** Distribution : South Africa * ''Pseudactaeon pusillus'' Forbes, 1844 ** Distribution : Florida, North Atlantic, Mediterranean ** Length : 11 mm * ''Pseudactaeon tenellus'' Loven, 1846 * ''Pseudactaeon luteofasciatus'' (Mühlfeldt, 1829): synonym of ''Acteon tornatilis'' (Linnaeus, 1758)
Genus ''Punctacteon'' <small>Kuroda & Habe, 1961</small> * ''Punctacteon amakusaensis'' T. Habe, 1949 ** Distribution : Indo-Pacific * ''Punctacteon cebuanus'' Lan, 1985 ** Distribution : Philippines * ''Punctacteon eloisae'' <small>Abbott, 1973</small> '''Eloise’s acteon''' ** Distribution : Red Sea, Oman. ** Length : 25–38 mm ** Description: sublittoral on sandy bottoms; cream-colored shell with 5 convex whorls, each whorl with many spiral windings; each whorl is filled with red-brown separate patterns with dark brown to black borders; similar to ''Maxacteon flammea''. * ''Punctacteon fabreanus'' (H. Crosse, 1874) ** Distribution : Philippines ** Length : 17–30 mm ** Description : white shell with five whorls, each whorl filled with light brown bands covering the many spirals of each whorl. * ''Punctacteon kajiyamai'' <small>T. Habe, 1976</small> ** Distribution : Indo-Pacific * ''Punctacteon kawamurai'' T. Habe, 1952 ** Distribution : Japan * ''Punctacteon kirai'' <small>T. Habe, 1949</small> ** Distribution : Indo-Pacific off the Philippines ** Length : 20 mm ** Description : shell whitish to brownish; five whorls, first whorl being the largest; each whorl has many spiral windings; outer lip is notched. * ''Punctacteon variegatus'' (synonym: Acteon variegatus) Bruguière, 1789 '''Pink-spotted acteon''' ** Distribution : Philippines, West Australia. ** Length : 9–27 mm ** Description : sublittoral on sandy bottoms; convex, cream-colored shell with five whorls, each whorls is covered with transverse pink-colored to light brown patterns, without dark borders; whirls with prominent shoulder.
Genus ''Pupa'' <small>Röding, 1798:</small>
Genus ''Rapturella'' <small>Salvador & C. Cunha, 2016</small>
Genus ''Rictaxis'' <small>Dall, 1871:</small>
Genus '''''Tenuiacteon''''' <small>Aldrich, 1921</small> * ''Tenuiacteon ambiguus'' Hutton, 1885
Genus '''''Tomlinula''''' <small>Strand, 1932</small> * ''Tomlinula turrita'' Watson, 1886
† Genus ''Volvaria'' <small>Lamarck, 1801</small>
;Genera brought into synonymy: * ''Actaeon'' Ersch & Gruber, 1818: synonym of ''Acteon'' Montfort, 1810 * † ''Actaeonidea'' Gabb, 1872: synonym of ''<small>Rictaxis</small>'' Dall, 1871 * ''Buccinulus'' H. Adams & A. Adams, 1854: synonym of ''Pupa'' Röding, 1798 * ''Callostracon'' sensu Nordsieck, 1972: synonym of † ''Colostracon'' Hamlin, 1884 * ''Crenilabrum'' Kobelt, 1892: synonym of ''Crenilabium'' Cossmann, 1889 * ''Dactylus'' Schumacher, 1817: synonym of ''Pupa'' Röding, 1798 * ''Japonacteon'' [sic]: synonym of ''Japonactaeon'' Taki, 1956 * ''Lissactaeon'' Monterosato, 1890: synonym of ''Crenilabium'' Cossmann, 1889 * ''Neoacteonina'' [sic] : synonym of ''Neactaeonina'' Thiele, 1912 * ''Obrussa'' Iredale, 1925: synonym of ''Obrussena'' Iredale, 1930 * ''Solidula'' Fischer von Waldheim, 1807: synonym of ''Pupa'' Röding, 1798 * ''Strigopupa'' Habe, 1958: synonym of ''Pupa'' Röding, 1798 * ''Tornatella'' Lamarck, 1816: synonym of ''Acteon'' Montfort, 1810
== References == ;Sources * Marcus, Eveline. "On some Acteonidae (Gastropoda, Opisthobranchia)." Papéis Avulsos de Zoologia 25.19 (1972): 167-188. * Vaught, K.C. (1989). ''A classification of the living Mollusca.'' American Malacologists: Melbourne, FL (USA). {{ISBN|0-915826-22-4}}. XII, 195 pp. ;Notes {{reflist}}
== External links == {{commons category}} * [http://www.seaslugsofhawaii.com/general/acteonidae.html Acteonidae] from [http://www.seaslugsofhawaii.com/ Sea slugs of Hawaii] * [https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1605/5667 Serge GOFAS, Ángel A. LUQUE, Joan Daniel OLIVER, José TEMPLADO & Alberto SERRA (2021) - The Mollusca of Galicia Bank (NE Atlantic Ocean); European Journal of Taxonomy 785: 1–114]
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Category:Acteonidae Category:Taxa named by Alcide d'Orbigny