Acteonidae
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.[1] 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.[1] The narrow shell aperture, which is ovate and pointed on the top, can be closed with an 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.[1]
Ecology
Acteonidae occur in warm seas in swallow and deep water.[1]
Animals predate polychaetes.[1]
Genera
Genera within the family Acteonidae include:
Genus Acteon Montfort, 1810 - type genus
Genus Callostracon
- Callostracon amabile Watson, 1886
- Callostracon tyrrhenicum Smriglio, C. & P. Mariottini, 1996
- Distribution : Tyrrhenian Sea.
Genus Crenilabium Cossmann, 1889
- Crenilabium aciculatum Cossman, 1889
- Crenilabium exilis (Jeffreys, 1870)
- Distribution : Florida, Mexico, Eastern Atlantic, Iceland, Mediterranean.
- Length : 8.1 mm
- Description : found at depths of 270 to 2640 m
- Crenilabium pacifica Kuroda & Habe, 1958
- Distribution : Indo-Pacific
Genus Inopinodon Bouchet, 1975
- Inopinodon azonicus Locard, 1897
Genus Japonactaeon Taki, 1956
- Japonactaeon pusillus Macgillivray, 1843
- Distribution : Florida, Japan, Mediterranean
- Length : 11 mm
- Description : found at depths of 200 to 820 m
Genus Liocarenus Harris & Burrows, 1891
- Liocarenus globulinus Forbes, 1844
- Distribution : Atlantic, Mediterranean
Genus Lissacteon Monterosato, 1890
Genus Maxacteon
- Maxacteon cratericulatus Hedley, 1906
- Distribution : New Zealand
- Maxacteon fabreanus (= Acteon fabreanus) Crosse, 1874
- Distribution : Philippines
- Length : 17–30 mm
- Description : white shell with five whorls, each whorl filled with lightbrown bands covering the many spirals of each whorl.
- Maxacteon flammea (= Acteon flammeus) Gmelin, 1791
- Distribution : Red Sea, tropical Indo-West Pacific
- Length : 17 mm
- Description : the headshield is developing secondary tentacles.
- Maxacteon hancocki (= Acteon hancocki) Rudman, 1971
- Distribution : New Zealand
- Length : 6 mm
- Description : headshield with a pair of fleshy lobes; thin operculum; white shell with orange-brown markings at the base and at the apex; large body whorl; large columella, slightly twisted; shell sculptured with grooves
- Maxacteon milleri (= Acteon milleri) Rudman, 1971
- Distribution : New Zealand
Genus Microglyphis Dall, 1902
- Microglyphis breviculus Dall, 1902
- Microglyphis curtulus Dall
- Microglyphis estuarinus Dall, 1908
- Distribution : West America
- Microglyphis globularis Smith, 1875
- Microglyphis japonicus T. Habe, 1952
- Distribution : Indo-Pacific
- Microglyphis mazatlanicus Dall, 1908
- Distribution : West America
- Microglyphis perconicus Dall, 1890
- Distribution : West America
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
- Obrussena moeshimaensis T. Habe, 1952
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 Pseudacteon Thiele, 1925
- Pseudacteon albus Sowerby, 1873
- Distribution : South Africa
- Pseudacteon pusillus Forbes, 1844
- Distribution : Florida, North Atlantic, Mediterranean
- Length : 11 mm
- Pseudacteon tenellus Loven, 1846
Genus Punctacteon Kuroda & Habe, 1961
- Punctacteon amakusaensis T. Habe, 1949
- Distribution : Indo-Pacific
- Punctacteon cebuanus Lan, 1985
- Distribution : Philippines
- Punctacteon eloisae = Acteon eloisae
- Punctacteon fabraeus H. Crosse
- Punctacteon kajiyamai T. Habe, 1976
- Distribution : Indo-Pacific
- Punctacteon kawamurai T. Habe, 1952
- Punctacteon kirai T. Habe, 1949
- Distribution : Indo-Pacific
- Punctacteon virgatus : = Acteon virgatus
Genus Pupa Röding, 1798:
Genus Rictaxis Dall, 1871:
The genus name is derived from Latin words, meaning “open mouth”, and “axis” referring to the columella.
- Rictaxis albus Sowerby, 1873
- Distribution : South Africa
- Length : 10–21 mm
- Description white shell with numerous spiraling white to lightbrown grooves
- Rictaxis painei Dall, 1903
- Rictaxis punctocaelatus Carpenter, 1864 Barrel shell; Carpenter's baby bubble
- Distribution : Southern Alaska, British Columbia, California
- Length : 10–20 mm
- Description : found in sand from lowtide line to depths up to 50 m; evenly elleptical shell with alternating darker brown and grayish-brown bands; outer lip and columellar folds are whitish; large spire; ovate columella strongly twisted, with a pointed posterior notch and a rounded base.
- Rictaxis punctostriatus (C. B. Adams, 1840) Adam’s baby bubble, pitted baby bubble
Genus Tenuiacteon
- Tenuiacteon ambiguus Hutton, 1885
Genus Tomlinula Strand, 1932
- Tomlinula turrita Watson, 1886
References
This article incorporates public domain text from the reference.[1]
External links