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Clypeosectidae
Lepetodrilidae is a family of small, deep-sea sea snails, hydrothermal vent limpets, marine gastropod mollusks in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P.; Gofas, S. (2012). Lepetodrilidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=180906 on 2013-02-16 This family has no subfamilies. Description These deep-sea species are found and are endemic at hydrothermal vents. Their limpet-shaped shell consist of non-nacreous aragonite. The thick periostracum covers the shell edge. The apex is posterior, in some species projecting posteriorly, and deflected to the right. The shell has no sculpture or it consists of beads or imbricate radial ribs. There is no operculum. The muscle scar forms the shape of a horseshoe. The rhipidoglossate radula The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, somet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepetodriloidea
Lepetodriloidea is a superfamily of small to large sea snails, hydrothermal vent limpets, marine gastropod mollusks in the clade Vetigastropoda. Families Families within the superfamily Lepetodriloidea include: *Family Lepetodrilidae McLean, 1988 *Family Sutilizonidae Sutilizonidae is a taxonomic family of sea snails, deepwater hydrothermal vent snails, marine gastropod mollusks in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Taxonomy This family has no ... McLean, 1989 ;Families brought into synonymy: * Clypeosectidae McLean, 1989: synonym of Lepetodrilidae * Gorgoleptidae: synonym of Lepetodrilidae References Vetigastropoda {{Vetigastropoda-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Hamilton McLean
James Hamilton McLean (17 June 1936 - 11 November 2016)Coan E. V., Kabat A. R. & Petit R. E. (15 February 2009''2,400 years of Malacology'' (6th Edition). was an American malacologist (a biologist who studies mollusks). He specialized in marine gastropods. He worked on many families of Eastern Pacific gastropods including the Fissurellidae, Trochidae, Turbinidae and Liotiidae, and also investigated deep sea gastropods from hydrothermal vents. McLean worked as a curator of Natural History Museum of Los Angeles County from 1964 to 2001 and was a curator emeritus there until his death in November 2016. Molluscs described McLean, often together with other malacologists, described, according to the database WoRMS, 385 new taxa.(7 December 2007) from Natural History Museum of Los Angeles County website At least 37 taxa were named for James McLean with the epithet ''macleani'' (according to WoRMS) He named numerous taxa of marine gastropods including: * Clypeosectidae McLean, 1989, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy Of The Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks. (Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwater, and from saltwater.) The paper setting out this taxonomy was published in the journal ''Malacologia''. The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain. The Bouchet & Rocroi system was the first complete gastropod taxonomy that primarily employed the concept of clades, and was derived from research on molecular phylogenetics; in this context a clade is a "natural grouping" of organisms based upon a statistical cluster analysis. In contrast, most of the previous overall taxonomic schemes for gastropods relied on morphological features to classify these animals, and used taxon ranks such as order, superorder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrothermal Vent
A hydrothermal vent is a fissure on the seabed from which geothermally heated water discharges. They are commonly found near volcanically active places, areas where tectonic plates are moving apart at mid-ocean ridges, ocean basins, and hotspots. Hydrothermal deposits are rocks and mineral ore deposits formed by the action of hydrothermal vents. Hydrothermal vents exist because the earth is both geologically active and has large amounts of water on its surface and within its crust. Under the sea, they may form features called black smokers or white smokers. Relative to the majority of the deep sea, the areas around hydrothermal vents are biologically more productive, often hosting complex communities fueled by the chemicals dissolved in the vent fluids. Chemosynthetic bacteria and Archaea form the base of the food chain, supporting diverse organisms, including giant tube worms, clams, limpets and shrimp. Active hydrothermal vents are thought to exist on Jupiter's moon Europa an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusk
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 estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepetodrilus
''Lepetodrilus'' is a genus of small, deep-sea sea snails, hydrothermal vent limpets, marine gastropod mollusks in the family Lepetodrilidae. A few species have been found in methane and sulfide seeps. Species Species within the genus ''Lepetodrilus'' include: * '' Lepetodrilus atlanticus'' Warén & Bouchet, 2001 * '' Lepetodrilus concentricus'' Linse, Roterman & C. Chen, 2019 * '' Lepetodrilus corrugatus'' McLean, 1993 * '' Lepetodrilus cristatus'' McLean, 1988 * '' Lepetodrilus elevatus'' McLean, 1988 * '' Lepetodrilus fucensis'' McLean, 1988 * '' Lepetodrilus galriftensis'' McLean, 1988 * '' Lepetodrilus gordensis'' Johnson, Young, Jones, Waren & Vrijenhoek, 2006 * '' Lepetodrilus guaymasensis'' McLean, 1988 * '' Lepetodrilus japonicus'' Okutani, Fujikura & Sasaki, 1993 * '' Lepetodrilus nux'' Okutani, Fujikura & Sasaki, 1993 * '' Lepetodrilus ovalis'' McLean, 1988 * '' Lepetodrilus pustulosus'' McLean, 1988 * '' Lepetodrilus schrolli'' Beck, 1993 * '' Lepetodrilus shannonae'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gorgoleptis
''Gorgoleptis'' is a genus of sea snails, marine gastropod mollusks in the family Lepetodrilidae Lepetodrilidae is a family of small, deep-sea sea snails, hydrothermal vent limpets, marine gastropod mollusks in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P.; Gofas, S. (2012). Lep .... Species Species within the genus ''Gorgoleptis'' include: * '' Gorgoleptis emarginatus'' McLean, 1988 * '' Gorgoleptis patulus'' McLean, 1988 * '' Gorgoleptis spiralis'' McLean, 1988 References External links * Lepetodrilidae {{Lepetodrilidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clypeosectus
''Clypeosectus'' is a genus of sea snails, marine gastropod mollusks in the family Lepetodrilidae Lepetodrilidae is a family of small, deep-sea sea snails, hydrothermal vent limpets, marine gastropod mollusks in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P.; Gofas, S. (2012). Lep .... Species Species within the genus ''Clypeosectus'' include: * '' Clypeosectus curvus'' McLean, 1989 * '' Clypeosectus delectus'' McLean, 1989 References External links * Lepetodrilidae {{Lepetodrilidae-stub ... [...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] |
Operculum (gastropod)
The operculum (; ) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails; the structure is found in some marine and freshwater gastropods, and in a minority of terrestrial gastropods, including the families Helicinidae, Cyclophoridae, Aciculidae, Maizaniidae, Pomatiidae, etc. The operculum is attached to the upper surface of the foot and in its most complete state, it serves as a sort of "trapdoor" to close the aperture of the shell when the soft parts of the animal are retracted. The shape of the operculum varies greatly from one family of gastropods to another. It is fairly often circular, or more or less oval in shape. In species where the operculum fits snugly, its outline corresponds exactly to the shape of the aperture of the shell and it serves to seal the entrance of the shell. Many families have opercula that are reduced in size, and which a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sculpture (mollusc)
Sculpture is a feature of many of the shells of mollusks. It is three-dimensional ornamentation on the outer surface of the shell, as distinct from either the basic shape of the shell itself or the pattern of colouration, if any. Sculpture is a feature found in the shells of gastropods, bivalves, and scaphopods. The word "sculpture" is also applied to surface features of the aptychus of ammonites, and to the outer surface of some calcareous opercula of marine gastropods such as some species in the family Trochidae. Sculpture can be concave or convex, incised into the surface or raised from it. Sometimes the sculpture has microscopic detailing. The term "sculpture" refers only to the calcareous outer layer of shell, and does not include the proteinaceous periostracum, which is in some cases textured even when the underlying shell surface is smooth. In many taxa, there is no sculpture on the shell surface at all, apart from the presence of fine growth lines. The sculpture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apex (mollusc)
In anatomy, an apex (adjectival form: apical) is part of the shell of a mollusk. The apex is the pointed tip (the oldest part) of the shell of a gastropod, scaphopod, or cephalopod. The apex is used in end-blown conches. Gastropods The word "apex" is most often used to mean the tip of the spire of the shell of a gastropod. The apex is the first-formed, and therefore the oldest, part of the shell. To be more precise, the apex would usually be where the tip of the embryonic shell or protoconch is situated, if that is still present in the adult shell (often it is lost or eroded away). Coiled gastropod shells The phrase apical whorls, or protoconch, means the whorls that constitute the embryonic shell at the apex of the shell, especially when this is clearly distinguishable from the later whorls of the shell, otherwise known as the teleoconch. Comparison of the apical part and the whole shell of ''Otukaia kiheiziebisu'': File:Calliostoma kiheiziebisu apex.png File:Calliostoma k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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