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Lissospira
''Lissospira'' is a genus of sea snails, marine gastropod mollusks in the family Skeneidae. Description This genus was proposed for a group of deepwater species which had been erroneously referred to '' Cyclostrema''. They are small, thin, of rather delicate texture (with the exception of '' Lissospira rarinota''), opaque white, and slightly lustrous. Their shell consists of few convex whorls forming an elevated spire, with a relatively large, prominent nuclear whorl and a large body whorl. The suture is deep. The umbilicus is small, deep, and does not show any whorls. The aperture is somewhat oblique, circular with a slight sutural angle, and not modified by the body whorl to which the simple, continuous peritreme is but slightly attached. The aperture often has an indistinct thread just within the inner lip, fading out above and below, so that it extends but about halfway round the aperture. It is much nearer the edge along the columellar margin than at the ends and is evid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Chalossensis
''Lissospira'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Skeneidae. Description This genus was proposed for a group of deepwater species which had been erroneously referred to ''Cyclostrema''. They are small, thin, of rather delicate texture (with the exception of ''Lissospira rarinota''), opaque white, and slightly lustrous. Their shell consists of few convex Whorl (mollusc), whorls forming an elevated Spire (mollusc), spire, with a relatively large, prominent nuclear whorl and a large body whorl. The Suture (anatomy), suture is deep. The Umbilicus (mollusc), umbilicus is small, deep, and does not show any whorls. The Aperture (mollusc), aperture is somewhat oblique, circular with a slight sutural angle, and not modified by the body whorl to which the simple, continuous peritreme is but slightly attached. The aperture often has an indistinct thread just within the inner Lip (gastropod), lip, fading out above and below, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Proxima
''Lissospira'' is a genus of sea snails, marine gastropod mollusks in the family Skeneidae. Description This genus was proposed for a group of deepwater species which had been erroneously referred to ''Cyclostrema''. They are small, thin, of rather delicate texture (with the exception of '' Lissospira rarinota''), opaque white, and slightly lustrous. Their shell consists of few convex whorls forming an elevated spire, with a relatively large, prominent nuclear whorl and a large body whorl. The suture is deep. The umbilicus is small, deep, and does not show any whorls. The aperture is somewhat oblique, circular with a slight sutural angle, and not modified by the body whorl to which the simple, continuous peritreme is but slightly attached. The aperture often has an indistinct thread just within the inner lip, fading out above and below, so that it extends but about halfway round the aperture. It is much nearer the edge along the columellar margin than at the ends and is evide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Bushae
''Lissospira bushae'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae,Rosenberg, G. (2012). ''Lissospira bushae''. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532977 on 2012-09-01 Description The size of the shell attains 3.3 mm, its diameter 2.7 mm. (Original description) The shell resembles ''Lissospira proxima'' Tryon, 1888 but it is larger and features a less elevated spire. It comprises nearly four white, well-rounded, smooth, and polished whorls. A well-marked but not deep suture is present. The shell has a perforate umbilicus with no spiral striations around it. The base is convex. The aperture is nearly circular, and the lips are united over the body by a thin layer of enamel. The margins are thin and entire. The inner lip lies close to but is not reflected over the umbilicus. Distribution This species occurs in the Atlantic Ocean off Georgia, United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Striata
''Lissospira striata'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.Rosenberg, G. (2012). ''Lissospira striata'' Bush, 1897. Accessed through: World Register of Marine Species aon 2012-09-01 Description The height of the shell attains 1.5 mm, its diameter 2 mm. The shell consists of about three convex Whorl (mollusc), whorls forming a comparatively low, somewhat depressed spire. The entire surface below the relatively large, little raised, smooth nuclear whorl, is covered with raised, rounded, well-separated, revolving microscopic threads, most distinct on the base. The small umbilicus is scarcely more than a chink. The aperture and the operculum are typical. Distribution This species occurs in the Atlantic Ocean off New England, United States, found off Martha's Vineyard Martha's Vineyard, often simply called the Vineyard, is an island in the U.S. state of Massachusetts, lying just south of Cape Cod. It is known for being a p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Ornata
''Lissospira ornata'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.Rosenberg, G. (2012). ''Lissospira ornata'' (A. E. Verrill, 1884). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532980 on 2012-09-01 Description The diameter of the shell attains 2.6 mm. This species agrees in form and condition of the umbilical region with the '' Lissospira dalli''. But it is very peculiarly marked on the base by thin, impressed lines, running obliquely and crossing the concentric spiral lines at a large angle, so as to produce a sort of "herring-bone" pattern as shown in the figure. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Abyssicola
''Lissospira abyssicola'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.Rosenberg, G. (2012). ''Lissospira abyssicola'' Bush, 1897. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532976 on 2012-09-01 Description The size of the shell attains 2.5 mm. In its general appearance this marine species resembles a true ''Lissospira'', but the umbilical chink is channeled and defined by a raised thread and the aperture is modified by the body whorl to which the peritreme is more attached than in a typical species. It is similar in form to '' Lissospira dalli'' but larger, without sculpture and with the columellar lip less flattened. Distribution This species occurs in the Eastern Atlantic Ocean off Georges Bank Georges Bank (formerly known as St. Georges Bank) is a large elevated area of the sea floor between Cape Cod, Massachusetts (United States), and Cape Sable Island, Nova Scotia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Dalli
''Lissospira dalli'' is a small species of sea snail, a marine gastropod mollusk in the family Skeneidae.Rosenberg, G. (2012). ''Lissospira dalli'' (A. E. Verrill, 1882). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532978 on 2012-09-01 Description The height of the yellowish white shell attains 2 mm, its diameter 2.25 mm. The shell has a trochiform shape and contains 3½ whorls that enlarge rapidly. They are well rounded, with a deeply impressed suture. The apical whorl is a little prominent, visible in a side-view. The body whorl is ventricose. The aperture is nearly circular. The outer lip shows a slight angle anteriorly. The columella is evenly curved The base of the shell contains seven or eight spiral incised lines. They number seven or eight and cover the base of the shell and the umbilical depression. The umbilicus is imperforate or represented by a very narrow chink. The surface of the pale shell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Valvata
''Lissospira valvata'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.Rosenberg, G. (2012). ''Lissospira valvata'' (Dall, 1927). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532983 on 2012-09-01 Description The size of the shell attains 2.6 mmn its diameter also 2.6 mm. (Original description) The shell is small, white, smooth, and polished, featuring about four well-rounded whorls separated by a distinct but not deep suture. The spire is only moderately elevated, and the protoconch is small and glassy. The base is rounded and smooth, containing a small perforate umbilicus. The aperture is circular and slightly oblique, with simple, thin margins. However, the inner lip near the umbilicus is slightly reflected and thickened. Some of the immature specimens display a slight angulation around the umbilical depression. Distribution This species occurs in the Atlantic Ocean off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Convexa
''Lissospira convexa'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae. Description Distribution The Lissospira convexa is commonly found in the North Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ... References convexa Gastropods described in 1897 {{Trochoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissospira Rarinota
''Lissospira rarinota'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.Rosenberg, G. (2012). ''Lissospira rarinota'' Bush, 1897. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532981 on 2012-09-01 Description The height of the shell attains 1.6 mm, its diameter 2.2 mm. The white shell is smooth, semi-opaque, of firm texture, with brilliant luster so that it appears somewhat porcellanous. The three whorls are convex, with a single, delicate, raised, microscopic, spiral line just below the distinct suture, defining a narrow, inconspicuous, slightly concave or channeled, sutural area. The nucleus is relatively small, and a little raised. The body whorl is large. The spire is low. The form of the aperture and the peritreme and the channeled umbilical chink, bordered by an inconspicuous, rounded thread, place this species with Lissospira, although the texture of the shell is firmer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |