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Pseudodaphnella Ramsayi
''Pseudodaphnella ramsayi'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The white shell is oblong ovate, somewhat acuminated, longitudinally closely ribbed, corded with fine transverse ridges. The interstices are deep. The shell contains six flat whorls, encircled at the suture with black, showing plainer on the back of the body whorl. The brown apex is acute. The outer lip is thickened. The sinus is narrow. The siphonal canal is a little recurved. A peculiar wide basal furrow groups ''Pseudodaphnella ramsayi'' with such species as '' Philbertia alba'' Deshayes, 1863, ''Paramontana blanfordi'' (Nevill & Nevill, 1875), '' Kermia cavernosa'' (Reeve, 1843) ''Pseudodaphnella leuckarti'' (Dunker, 1860), ''Paramontana mayana'' Hedley, 1922 ''Pseudodaphnella oligoina'' Hedley, 1922, ''Kermia spelaeodea'' Hervier, 1897, '' Pseudodaphnella stipata'' Hedley, 1922 and ''Pseudodaphnella tincta ''Pseudodaphnella tincta'' is a specie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John William Brazier
John William Brazier (23 September 1842 – 20 August 1930) was a malacologist from Australia. Early life He was born to Captain John Brazier and his wife Mary nee McMillan. His father commanded whaling vessels out of Sydney, Australia, and during his voyages he collected sea shells as a hobby. His son, John junior, accompanied him to sea on at least one of those voyages and he too became interested in collecting sea shells. Professional life In 1865 John Brazier junior accompanied Julius Brenchley on the voyage of H.M.S. Curacoa to Norfolk Island, Samoa, Tonga, Fiji, the New Hebrides, the Solomon Islands and New Caledonia. After several other shell collecting expeditions in Australasia he joined William John Macleay 's 1875 expedition in the Chevert to New Guinea via the Great Barrier Reef The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over over an area of approximately . The reef i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siphonal Canal
The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is drawn into the mantle cavity and over the gill and which serves as a chemoreceptor to locate food. Siphonal canals allow for active transport of water to sensory organs inside the shell. Organisms without siphonal canals in their shells rely on passive or diffuse transport or water into their shell. Those with siphonal canals have a direct inhalant stream of water that interacts with sensory organs to detect concentration and direction of a stimulus, such as food or mates. In certain groups of carnivorous snails, where the siphon is particularly long, the structure of the shell has been modified in order to house and protect the soft structure of the siphon. Thus the siphonal canal is a semi-tubular extension of the aperture of the shell th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Tincta
''Pseudodaphnella tincta'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Pseudodaphnella tincta (Reeve, 1846). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=596299 on 2019-11-16 Description The length of the shell varies between 4 mm and 12 mm. The longitudinal ribs of the white shell are strong, with revolving riblets reticulating them and with deep interstices. The sinus is broad. The small, solid shell has a fusiform shape. It is white with a series of brown spots below the suture on alternate ribs, and a brown band on the base. The sculpture consists of numerous longitudinal ribs slightly narrower than their intervals, and about 13 in number on the body whorl. These are crossed by spiral cords, narrower than their intervals, of which there are 6 on the body whorl, followed by a costate space, as though a cord had been omitted, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Stipata
''Pseudodaphnella stipata'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 4 mm, its diameter 2 mm. (Original description) The small shell is solid and broad in proportion to length. The adult shell contains about 4 whorls. Sculpture:—The radials are prominently spaced ribs, set about ten to a whorl. The spirals are strong cords, two on the antepenultimate whorl, three on the penultimate whorl, and seven on the body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b .... On the latter the third spiral from the suture runs into the top of the varix, between the fourth and the fifth is a wide gap, and the last three are tubercular and traverse the snout. The aperture shows a very thick and pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Oligoina
''Pseudodaphnella oligoina'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Pseudodaphnella oligoina Hedley, 1922. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=436653 on 2019-11-11 Description The length of the shell attains 7 mm , its diameter 3 mm. (Original description) The shell is of medium size, rather thin, lanceolate, turreted, with a sloping shoulder, perpendicular periphery, and an excavate base. Its colour is uniform pale buff. The shell contains 7 whorls, including a two-whorled protoconch. Sculpture: The radials are discontinuous from whorl to whorl, feeble and oblique on the shoulder, prominent and perpendicular on the peripheral area, and traversing the basal excavation, widely spaced. There are on the body whorl ten spirals slighter than the radials. On the fasciole area of the body whorl are three faint and narrow threads. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paramontana Mayana
''Paramontana mayana'', common name May's turrid, is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Paramontana mayana (Hedley, 1922). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=434582 on 2019-08-07 Description The length of the shell attains 6 mm, its diameter 2 mm. (Original description) The small, lanceolate, subturretedshell is rather thin. Its colour is uniform white or uniform cinnamon, or white spotted with cinnamon. The shell contains 6 whorls, including a two-whorled protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called .... The sculpture is variable, according as extra threads are or are not intercalated. The radials extendi from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudodaphnella Leuckarti
''Pseudodaphnella leuckarti'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 7 mm, its diameter 2.5 mm. The shell has an ovately acute shape with 6-7 slightly convex whorls. The surface of this small monochrome brown snail is characterized by fairly dense, rounded longitudinal ribs, covered by regular raised striae, forming a coarse grid. The aperture is narrow and somewhat shorter than half the length of the shell. The siphonal canal is straight and short, in which the longitudinal ribs are still visible. 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 ..., Korea and the Philippines. References External links * Gastropods.com: ''Ps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kermia Cavernosa
''Kermia cavernosa'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Kermia cavernosa (Reeve, 1845). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=759408 on 2019-07-15 Description The length of the shell attains 9 – 10 mm. The shell is narrowly shouldered. The ribs are oblique, rather narrow. The shell is white, the shoulder light chestnut, with sometimes a few chestnut spots on the body whorl. Distributi ...
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Paramontana Blanfordi
''Paramontana blanfordi'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Paramontana blanfordi (G. Nevill & H. Nevill, 1875). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=596295 on 2019-08-06 Description The length of the shell attains 5.5 mm, its diameter 2.5 mm. (Original description) The cylindrically ovate shell is elongate. The sutures are rather indistinct. The apex is sharp and pointed, a beautiful deep mauve colour throughout. The shell contains 7 to 8 whorls, longitudinally and transversely ribbed. The ribs are ery prominent, of equal thickness, forming granules at the points of intersection. Towards the base of the body whorl an excavated furrow appears. The columella is short and twisted. The aperture is moderately wide, contorted, with a rather large sinus. The outer lip is thickened with two or three granules just wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philbertia Alba
''Philbertia alba'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. This is a ''taxon inquirendum''. Description Distribution This marine species occurs off Réunion Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island .... References * Fischer, P.-H. (1970) ''Gastéropodes testacés marins du Golfe de Siam''. Journal de Conchyliologie, 108, 93–121 External links Deshayes, G.P. (1863) Catalogue des mollusques de l‛Ile de la Réunion (Bourbon). In Maillard, L. (Ed.) Notes sur l'Ile de la Réunion (Bourbon). Mollusques. Dentu, Paris, pp. 1–144 Raphitomidae Gastropods described in 1863 {{Raphitomidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lip (gastropod)
In the shell of gastropod mollusks (a snail shell), the lip is the free margin of the peristome (synonym: peritreme) or aperture (the opening) of the gastropod shell. In dextral (right-handed) shells (most snail shells are right-handed), the right side or outer side of the aperture is known as the outer lip (''labrum''). The left side of the aperture is known as the inner lip or columellar lip (''labium'') if there is a pronounced lip there. In those species where there is no pronounced lip, the part of the body whorl that adjoins the aperture is known as the parietal wall. The outer lip is usually thin and sharp in immature shells, and in some adults (e.g. the land snails ''Helicella'' and '' Bulimulus''). However, in some other land snails and in many marine species the outer lip is ''thickened'' (also called ''callused''), or ''reflected'' (turned outwards). In some other marine species it is curled inwards (''inflected''), as in the cowries such as ''Cypraea''. It can also be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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