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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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a 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, 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. The calcareous central layer, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as conchiolin. The outermost layer is the periostr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by Mollusca, 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 Bivalvia, 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 herbivore, herbivorous and carnivore, carnivorous snails and slugs. The arrangement of teeth (Denticle (tooth feature), 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 ... [...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 The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ... to Japan 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 G ... [...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 South India, also known as Dakshina Bharata or Peninsular India, consists of the peninsular southern part of India. It encompasses the Indian states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, and Telangana, as well as the union territ ... and Sri Lanka. 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 o ... [...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'' 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 polished, slightly centrally concave, with a narrow thinner band marginating the coil. The soft parts recall those of ''Gaza superba'', but the muzzle seems shorter and there are seven slender, rather long epipodial filaments on the right side, instead of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaza Polychoronos
''Gaza polychoronos'' is a species of sea snail, a marine (ocean), marine gastropod mollusk in the family (biology), family Margaritidae.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 * Gaza (gastropod), polychoronos Gastropods described in 2012 {{Margaritidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
