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Gaza (gastropod)
''Gaza'' is a genus of sea snails, marine gastropod mollusks in the family Margaritidae. Description An examination of the soft parts of a species of the genus Gaza, by Dall showed the operculum to be very thin, light brown, and with about seven whorls. The animal was of a whitish color without any spots or markings, and with very large black eyes set on a good-sized peduncle closely adjacent to and behind the tentacles. There is a single narrow gill in the usual position. The tentacles are long, large, and rather slender. The foot is short, broad, and bluntly rounded in front, behind almost truncate. In fact the contracted specimen looked almost as if there was a broad posterior indentation in the middle line. The muzzle is long, narrow, subcylindrical above and transversely expanded at its distal end, which is semi-lunar with a densely papillose surface and fringed edges. This expansion is nearly three times as wide as the stem of the muzzle. The epipodium (the lateral groov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus. The radula is unique to the molluscs, and is found in every class of mollusc except the bivalves, which instead use cilia, waving filaments that bring minute organisms to the mouth. Within the gastropods, the radula is used in feeding by both herbivorous and carnivorous snails and slugs. The arrangement of teeth ( denticles) on the radular ribbon varies considerably from one group to another. In most of the more ancient lineages of gastropods, the radula is used to graze, by scraping diatoms and other microscopic algae off rock surfaces and other substrates. Predatory marine snails such as the Naticidae use the radula plus an acidic secretion to bore through the shell of other molluscs. Other predatory marine snails ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callogaza Watsoni
''Callogaza watsoni'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae. Description The slightly nacreous shell reaches a length of 15 mm. It contains 6¼ whorls having the same general form as in ''Gaza fischeri'', but with a more prominent nucleus. This nucleus is small, bulbous, and dark brown. The first 2½ whorls are glassy, brown spotted, smooth. Subsequently, the exterior two-thirds of the upper surface of the whorls are sculptured with four or five strong revolving threads. The space between them and the suture above contains strong, even, flexuously radiating, shining, rounded plications (about eight to a millimeter) which pass obliquely over the revolving threads and appear again on the base as strong regular plications in the umbilical region, extending from the umbilical carina one-third of the way toward the periphery. The base of the shell is covered with numerous revolving threads flattened until their interspaces appear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callogaza Sericata
''Callogaza sericata'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.Rosenberg, G. (2012). ''Callogaza sericata'' (Kira, 1959). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=594178 on 2012-12-03 Description The size of the shell varies between 10 mm and 20 mm. Distribution This marine occurs in the Northwest Pacific off the Philippines to 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 ... at depths between 50 m and 300 m. References * Higo, S., Callomon, P. & Goto, Y. (1999). ''Catalogue and bibliography of the marine shell-bearing Mollusca of Japan''. Osaka. : Elle Scientific Publications. 749 pp. Luiz Ricardo L. Simone & Carlo M. Cunha, ''Revision of genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callogaza Frederici
''Callogaza frederici'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.Rosenberg, G. (2012). ''Callogaza frederici''. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=594179 on 2012-12-03Simone L.R.L. & Cunha C.M. (2006) Revision of genera Gaza and Callogaza (Vetigastropoda, Trochidae), with description of a new Brazilian species. Zootaxa 1318: 1-40. (21 September 2006) Distribution This marine species occurs off South India and Sri Lanka Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an .... References * Smith, E.A. (1906) Natural history notes from R.I.M.S. ‘Investigator” – series III, No. 10. ''On the Mollusca from the Bay of Bengal and the Arabian Sea''. Annals and Magazine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Rathbuni
''Gaza rathbuni'', common name Rathbun's gaza, is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.Bouchet, P. (2012). ''Gaza rathbuni''. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575616 on 2012-12-03 Description The size of the discoid shell varies between 24 mm and 30 mm. The teleoconch consists of 4.5 weakly convex whorls. This species differs from ''Gaza superba ''Gaza superba'', common name the superb gaza, is a species of deep sea sea snail, a marine gastropod mollusk in the family Gazidae, the top snails. Description The shell is 2,5 to 4 cm. in width and present a somewhat elevated spire. Th ...'' by being more depressed, with stronger spiral grooving, a slightly smaller umbilicus, and more flattened over the sutures. The periostracum is olivaceous, polished, very thin and readily dehiscent. The operculum contains about seven whorls, thin and pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Polychoronos
''Gaza polychoronos'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae Margaritidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P. (2012). Margaritidae. Accessed through: World Register ....Bouchet, P. (2012). ''Gaza polychoronos'' Vilvens, 2012. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=596468 on 2012-12-03 Description The height of the shell attains 18 mm. Distribution This marine species occurs off the Society Islands, French Polynesia. References * Vilvens C. (2012) New species and new records of Seguenzioidea and Trochoidea (Gastropoda) from French Polynesia. Novapex 13(1): 1-23. External links To World Register of Marine Species* polychoronos Gastropods described in 2012 {{Margaritidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Olivacea
''Gaza olivacea'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.Rosenberg, G. (2012). ''Gaza olivacea'' Quinn, 1991. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532875 on 2012-12-03Simone L.R.L. & Cunha C.M. (2006) Revision of genera Gaza and Callogaza (Vetigastropoda, Trochidae), with description of a new Brazilian species. Zootaxa 1318: 1-40. (21 September 2006) Description The size of the shell varies between 25 mm and 45 mm. Distribution This species occurs in the Caribbean Sea, the Gulf of Mexico and the Atlantic Ocean off Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ... at depths between 238 m and 808 m. References * Quinn, J. F. Jr. 1991. ''New species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Fischeri
''Gaza fischeri'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae. Description (Original description by W.H. Dall) The size of the shell varies between 15 mm and 30 mm. This shell iconsists of six and a half whorls, and closely resembles ''Gaza daedala'', except in the following particulars. It is much more depressed proportionally. The upper margin of the aperture is distinctly depressed below its general plane. The radiating lines, almost microscopic in ''Gaza daedala'', are in this form impressed in the early whorls near the suture, so as to produce a succession of short ripples, following the recurved lines of growth, which give a fringe-like ornamentation to the suture, at the rate of about five ripples to a millimeter. The margin of the suture in this form is distinctly appressed, forming a narrow border. The operculum has about seven whorls. The umbilicus is completely floored over. The soft parts are like those of '' Gaza su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Daedala
''Gaza daedala'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.Rosenberg, G. (2012). ''Gaza daedala'' Watson, 1879. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=594177 on 2012-12-03 Distribution This marine species occurs in the Pacific Ocean off Fiji at a depth of 1100 m. Description (Original description by Watson) The height of the shell attains 20.6 mm, its diameter 17 mm. The thin shell has a depressedly globose shape with a convexly conical spire. It is translucent, horny, nacreous in its whole texture, and iridescent on the surface. It has a slightly reverted and narrowly thickened lip and a thin edged twisted columella, the point of which runs out into a bluntly mucronated angle. Sculpture: Longitudinals—the whole surface is covered with strong, puckered, oblique lines of growth, which are sharp-edged but flattened,. They are rather regular, with man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Cubana
''Gaza cubana'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae. Description The size of the shell varies between 23 mm and 37 mm. The pale beige, discoid shell has a weak but marked spiral sculpture. But the first two whorls of the teleoconch have a purple color. The open umbilicus is only sealed for about 75% by the callus of the inner lip. The apex is preserved. The spire is low and flat. Distribution This species occurs in the Caribbean Sea and the Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an oceanic basin, ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of ... at depths between 329 m and 1080 m. References * Clench, W. J. and C. G. Aguayo. 1940. ''Notes and descriptions of new deep-water Mollusca obtained by the Harvard-Habana Expedition off Cuba''. III.. Memorias de la Socied ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Compta
''Gaza compta'' is a species of sea snail, a marine gastropod mollusk in the family Margaritidae. Description The size of the shell varies between 23 mm and 28 mm. The pale beige shell has a weak spiral sculpture. But the first two whorls of the teleoconch have a purple color and they show some marked axial undulations. Distribution This species occurs in the Atlantic Ocean off Southeast Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ... at depths between 700 m and 800 m. References Luiz Ricardo L. Simone & Carlo M. Cunha, ''Revision of genera Gaza and Callogaza (Vetigastropoda, Trochidae), with description of a new Brazilian species''; Zootaxa1318: 1–40 (2006) External links * compta Gastropods described in 2006 {{Margaritidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
