Acteonidae

Acteonidae, common name the "barrel bubble snails", is a family of small sea snails, marine gastropod mollusks of the informal group Lower Heterobranchia.

Acteonidae, common name the "barrel bubble snails", is a family of small sea snails, marine gastropod mollusks of the informal group Lower Heterobranchia.

Shell description

The shell is usually smaller than 25 mm. 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. 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.

Genera

Genera within the family Acteonidae include: Genus Acteon Montfort, 1810 - type genus † Genus Acteonina d'Orbigny, 1850 Genus Bathyacteon Valdés, 2008 Genus Callostracon Repetto & Bianco, 2012 † Genus Colostracon Hamlin, 1884 Genus Crenilabium Cossmann, 1889 Genus Inopinodon Bouchet, 1975 Genus Japonactaeon Taki, 1956 Genus Lanayrella Salvador & C. Cunha, 2020 Genus Liocarenus Harris & Burrows, 1891 Liocarenus globulinus Forbes, 1844 Distribution : Atlantic, Mediterranean Genus Lissacteon Monterosato, 1890 Genus Maxacteon Rudman, 1971 ]] Genus Mysouffa Marcus, 1974 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 Thiele, 1912 Genus Obrussena Iredale, 1930 Obrussena bracteata Iredale, 1930 Distribution : Australia Obrussena moeshimaensis T. Habe, 1952 Distribution : Japan Genus Ongleya Finlay & Marwick, 1937 Genus Ovulacteon Dall, 1889 Ovulacteon meekii Dall, 1889 Distribution : Cuba, Bahamas, East Brazil Length : 5.5 mm Description : found at depths of 360 to 820 m Genus Pseudactaeon Thiele, 1925. 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 Kuroda & Habe, 1961 Punctacteon amakusaensis T. Habe, 1949 Distribution : Indo-Pacific Punctacteon cebuanus Lan, 1985 Distribution : Philippines Punctacteon eloisae Abbott, 1973 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 T. Habe, 1976 Distribution : Indo-Pacific Punctacteon kawamurai T. Habe, 1952 Distribution : Japan Punctacteon kirai T. Habe, 1949 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 Röding, 1798: Genus Rapturella Salvador & C. Cunha, 2016 Genus Rictaxis Dall, 1871: Genus Tenuiacteon Aldrich, 1921 Tenuiacteon ambiguus Hutton, 1885 Genus Tomlinula Strand, 1932 Tomlinula turrita Watson, 1886 † Genus Volvaria Lamarck, 1801 Genera brought into synonymy: Actaeon Ersch & Gruber, 1818: synonym of Acteon Montfort, 1810 † Actaeonidea Gabb, 1872: synonym of Rictaxis 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

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