|
Curtitoma
''Curtitoma'' is a genus of sea snails, marine gastropod mollusks in the family Mangeliidae. Description This genus was introduced by Paul Bartsch in 1941 to accommodate species with a distinct anal sinus and a protoconch sculptured with numerous fine threads, that were otherwise similar to the species in the genera '' Oenopota'' Moerch, 1852 and ''Propebela'' Iredale, 1918. The shell has an ovoid shape and is short and stubby. The whorls of the teleoconch are strongly tabulatedly shouldered and lack a keel at the angulation of the shoulder. The axial ribs show up strongly between the shoulder and the periphery, but disappear at the base of the shell. The spiral sculpture consists of incised lines on the spire and threads on the columella. The aperture is pear-shaped, decidedly channeled anteriorly and shows a feeble sinus at the shoulder. Grammatical gender The grammatical gender is feminine, as composed with the Greek noun τομή, an incision (gender: feminine). However oft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oenopota
''Oenopota'' is a genus of sea snails, marine gastropod mollusks in the family Mangeliidae. This genus doesn't form a monophyletic group. Therefore many species are only tentatively placed within this genus. Description In 1941 Paul Bartsch described species in this genus as having large, heavy and elongate -ovate to elongate- turreted shells. The protoconch is smooth at the apex, succeeded by a whorl with three spiral cords and rather distantly spaced axial ribs. The longitudinal ribs become stronger on succeeding whorls but evanesce at the base of the shell. The spiral sculpture weakens on succeeding whorls and finally becomes mere threads. The pear-shaped aperture is deeply channeled anteriorly. It shows in the outer lip near the summit a feeble posterior sinus. Later, in 1980, it has been stated by Bouchet & Warèn that there is a high variation within the arctic forms of this genus, such as the outer lip showing all transitions from sinuated to nonsinuated Distribut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Trevelliana
''Curtitoma trevelliana'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 6 mm and 12 mm. The whitish shell is somewhat thin, ovately fusiform and subventricose. It contains six whorls, slightly planate above the carina. The aperture is nearly equally contracted above and below. The outer lip is a little insinuate below the shoulder. The surface is lightly decussated by inconspicuous longitudinal plications, evanescent below the middle of the body whorl, and close, fine revolving striae. Distribution This marine species occurs in the Bering Strait ( Metchigme Bay), the Barents Sea, the Beaufort Sea, off Eastern Canada to Maine, USA, the North Atlantic Ocean (from Norway and Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Incisula
''Curtitoma incisula'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 5.5 mm and 10.5 mm. (Original description) The shell is small, sub-fusiform, too short ovate. It contains about five or six turreted, flattened whorls, which are angularly shouldered just below the suture. The subsutural band arises abruptly from the suture, nearly at right angles, and its surface is flat or slightly concave, marked by strongly recurved lines of growth, but mostly without spiral lines. The shoulder is often nearly right-angled. The whorls are decidedly flattened in the middle. There are on the body whorl, about twenty rather broad, flattened or rounded ribs, which are nearly straight, a little prominent and usually slightly nodose at the shoulder, but they disappear a short distance below it. They are separated by well excavated, concave grooves, deepest close to the shoulder. The most characteristic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Hebes
''Curtitoma hebes'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 6 mm and 9 mm. (Original description) The shell has a short-fusiform or subovate shape, with a short, blunt spire, and with five or six convex, but slightly angled or carinated whorls, which have a slightly flattened subsutural band. The suture is impressed and slightly channelled. The sculpture shows numerous small, regular, raised, spiral ridges, separated by wider grooves. Usually one, just below the subsutural band, is stronger and more raised, forming a slight carina. On the subsutural band they are faint, or indistinct. The spiral lines are often decussated, more or less, by equally slender, transverse, raised riblets, coincident with the lines of growth, but not uniformly present. These may produce a slightly cancellated structure, on all the whorls, and extend as curved riblets, across the subsutural band. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Decussata
''Curtitoma decussata'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 5 mm and 13 mm. The shell has an ovate-fusiform shape, with a moderate, scarcely turreted spire. It contains six or seven round-shouldered whorls. The sculpture consists of about 24 sigmoid longitudinal ribs, evanescing about the middle of the body whorl, and close revolving striae across the ribs. The sinus is well marked, close to the suture. The siphonal canal is narrowed, but short. The columella is nearly straight in the middle. The color of the shell is white, yellowish or pinkish white. Distribution This marine species is circum-arctic and occurs in the Northwest Atlantic Ocean, Canada and the Gulf of Maine; on the continental shelf of the Alaskan Beaufort Sea; found at depths between 25 m and 780 m. It has also been found as a fossil in Quaternary strata of Greenland and Iceland Iceland ( is, Ísla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Contraria
''Curtitoma contraria'' is a species of sea snail, a marine gastropod mollusc Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ... in the family Mangeliidae.Bouchet, P. (2012). Curtitoma contraria Bonfitto & Morassi, 2012. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=607864 on 2017-04-15 It is the only known species with a sinistral shell within the family Mangeliidae. Description The length of the shell attains 3.6 mm, its diameter 1.9 mm. Distribution This marine species occurs off Taiwan. References Bonfitto A. & Morassi M. (2012) A new sinistral turriform gastropod (Conoidea: Mangeliidae) from Taiwan. Zootaxa 3415: 63–68 External links MNHN, Paris: ''Curtitoma contraria'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Lawrenciana
''Curtitoma lawrenciana'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 6 mm and 18 mm. Distribution This species occurs in the Chukchi Sea, Northeast Russia, in the northern part of the Sea of Japan and off the Aleutians The Aleutian Islands (; ; ale, Unangam Tanangin,”Land of the Aleuts", possibly from Chukchi ''aliat'', "island"), also called the Aleut Islands or Aleutic Islands and known before 1867 as the Catherine Archipelago, are a chain of 14 large vo ...; found at depths between 62 m and 800 m. References Dall, W.H. (1919b) Descriptions of new species of Mollusca from the North Pacific Ocean in the collection of the United States National Museum. Proceedings of the United States National Museum, 56, 293–371* Dall, William Healey. ''Summary of the marine shellbearing mollusks of the northwest coast of America: from San Diego, California, to the Polar Sea, mostly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Fiora
''Curtitoma fiora'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell attains 11 mm. (Original description) The small shell is grayish white. It is acute, with a small subglobular protoconch and six subsequent whorls moderately rounded and with a slight shoulder. The suture is distinct, not appressed. The spiral sculpture consists of (on the penultimate whorl in front of the shoulder about 6) incised lines, with wider interspaces, overrunnuig the ribs. On the body whorl this sculpture extends to the siphonal canal . The axial sculpture consists of (on the body whorl about 17) short, rounded ribs extending from the shoulder, where they are most prominent, over the periphery and obsolete on the base. There are also fairly distinct incremental lines. The aperture is short, wide, with a feeble anal sulcus The anal sulcus, also called the anal sinus or anal canal, in Gastropods is a notch, a shelly tube at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Conoidea
''Curtitoma conoidea'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 8.5 mm and 15 mm. The white shell is narrow and with a long spire. It contains 7 whorls, convex, without carina. The plications are slight, somewhat sigmoid, almost obsolete on the body whorl: everywhere covered with moderately strong revolving striae. Distribution This species occurs in European waters off arctic Norway and Russia; on the continental shelf of the Alaskan Beaufort Sea. References * Sars, G.O. (1878) ''Mollusca regionis arcticae Norvegiae. Oversigt over de I Norges arktiskes region forekommende Bloddyr.'' Bidrag til kundskaben om Norges arktiske fauna. 1, 466 pp. Christiania * Bogdanov I. (1990). ''Mollusks of Oenopotinae Subfamily (Gastropoda, Pectinibranchia, Turridae) in the seas of the USSR''. Leningrad 221 p * Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Becklemishevi
''Curtitoma becklemishevi'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 5 mm and 8 mm. Distribution This marine species occurs in the Sea of Japan The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, it h ... and in the Okhotsk Sea. References * BOGDANOV, IP. "7 NEW SPECIES OF SUBFAMILY OENOPOTINAE FROM THE OKHOTSK SEA." ZOOLOGICHESKY ZHURNAL 68.11 (1989): 147–152. External links Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1-1295 Gulbin, Vladimir V. "Review of the Shell-bearing Gastropods in the Russian Waters of the East Sea (Sea of Japan). III. Caenogastropoda: Neogastropoda." The Korean Journal of Malacology 25.1 (2009): 51-70 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Bartschi
''Curtitoma bartschi'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The length of the shell varies between 5 mm and 10 mm. Distribution This marine species occurs off Japan and Urup Island Urup ( ja, 得撫島, Uruppu-to; russian: Уру́п, Urúp, ain, ウルㇷ゚, Urup) is an uninhabited volcanic island in the Kuril Islands chain in the south of the Sea of Okhotsk, northwest Pacific Ocean. Its name is derived from the Ainu la ..., Eastern Russia References * Bogdanov, I.P. (1985) New species of gastropod molluscs of the genus Oenopota (Gastropoda, Turridae) from Far Eastern seas of the USSR. Zoological Journal, 64 (3) : 448–453. External links Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1–1295 bartschi {{Mangeliidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtitoma Hinae
''Curtitoma hinae'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.Bouchet, P. (2011). Curtitoma hinae (Okutani, 1968). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=580609 on 2017-04-18 Description The length of the shell varies between 3 mm and 5 mm. Distribution This marine species occurs off Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north .... References * Hasegawa K. (2009) ''Upper bathyal gastropods of the Pacific coast of northern Honshu, Japan, chiefly collected by R/V Wakataka-maru. In: T. Fujita (ed.), Deep-sea fauna and pollutants off Pacific coast of northern Japan.'' National Museum of Nature and Science Monographs 39: 225–38 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |