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Peristome (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 b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strombus
''Strombus'' is a genus of medium to large sea snails, marine gastropod molluscs in the family Strombidae, which comprises the true conchs and their immediate relatives. The genus ''Strombus'' was named by Swedish Naturalist Carl Linnaeus in 1758. Around 50 living species were recognized, which vary in size from fairly small to very large. Six species live in the greater Caribbean region, including the queen conch, ''Strombus gigas'' (now usually known as ''Eustrombus gigas'' or ''Lobatus gigas''), and the West Indian fighting conch, '' Strombus pugilis''. However, since 2006, many species have been assigned to discrete genera. These new genera are, however, not yet found in most textbooks and collector's guides. Worldwide, several of the larger species are economically important as food sources; these include the endangered queen conch, which very rarely also produces a pink, gem-quality pearl. In the geological past, a much larger number of species of ''Strombus'' existed. Fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pythia (gastropod)
''Pythia'' is a genus of small air-breathing salt marsh snails, pulmonate gastropod mollusks in the subfamily Pythiinae of the family Ellobiidae.Bouchet, P. (2011). Pythia Röding, 1798. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=560065 on 2011-12-04 ''Pythia'' is a largely terrestrial genus commonly found in the Indo-Pacific. It lives in mangroves from above high tide to further inland. It is readily differentiated within the family by its dorso-ventrally flattened shell and heavily dentate aperture. Plate gave the first account of ''Pythia scarabaeus'' in 1897. ''Pythia'' is the type genus of the subfamily Pythiinae. Species According to the World Register of Marine Species, species in the genus ''Pythia'' include: * '' Pythia albovaricosa'' L. Pfeiffer, 1853 * '' Pythia anhi'' Thach, 2016 * '' Pythia apiensis'' E. A. Smith, 1884 * '' Pythia bischofi'' I. Rensch, 1937 * † '' Pythia bonneti'' (Cossmann, 1895) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nerita
''Nerita'' is a genus of medium-sized to small sea snails with a gill and an operculum, marine gastropod molluscs in the subfamily Neritinae of the family Neritidae, the nerites.MolluscaBase eds. (2021). MolluscaBase. Nerita Linnaeus, 1758. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=138254 on 2021-09-20 This is the type genus of the family Neritidae. Distribution and habitat Species of ''Nerita'' can be found worldwide in tropical waters in the middle and upper intertidal zones. They are gregarious herbivores. Description The thick shell is broadly ovate or globular and low-spired. It has a smooth surface. The shells are spirally ribbed or show some axial sculpturing. The ventral side has a large columellar callus or parietal wall. The callus shows small pustules. The aperture and the edge of the columella are usually dentate with fine or robust teeth. The calcareus operculum is thick and can be smooth or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janthina Exigua
''Janthina exigua'', also known as the dwarf janthina, is a species of small holoplanktonic sea snail, a marine gastropod mollusk in the family Epitoniidae, the violet snails or purple storm snails.MolluscaBase (2019). MolluscaBase. Janthina exigua Lamarck, 1816. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=140154 on 2019-10-09 Distribution This species is pelagic, and occurs around the world in tropical waters, in other words it is circumequatorial. It has been recorded from: * The Atlantic Ocean * British Isles * European waters * Madagascar * Mascarene Plateau * Mediterranean Sea * Mozambique * The Pacific Ocean * South Africa * The West Coast of Ireland Description The maximum recorded shell Shell may refer to: Architecture and design * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses ** Thin-shell structure Science B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thiara (gastropod)
''Thiara'' is a genus of freshwater snails, aquatic gastropod mollusks in the subfamily Thiarinae of the family Thiaridae. Species Species with accepted names within the genus ''Thiara'' include: * † '' Thiara aldrichi'' Palmer, 1944 * '' Thiara amarula'' (C. Linnaeus, 1758) - Africa, Australia, IndiaShell-bearing Mollusca: Thiara * '' Thiara aspera'' (Lesson, 1831) * '' Thiara australis'' (I. Lea & H. C. Lea, 1851) * '' Thiara bellicosa'' (Hinds, 1844) * '' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurotomaria
''Pleurotomaria'' is an extinct genus of sea snails, marine gastropod molluscs in the family Pleurotomariidae. Species With current taxonomic changes the genus ''Pleurotomaria'' has been reserved exclusively for fossil species (denoted with † below). Known fossil species of ''Pleurotomaria'' include: * † ''Pleurotomaria agarista'' Billings, 1865 * † ''Pleurotomaria anglica'' (Sowerby, 1818) (synonym: ''Trochus anglicus'') * † ''Pleurotomaria angulosa'' d'Orbigny, 1842 * † ''Pleurotomaria antitorquata'' Münster, 1840 * † ''Pleurotomaria arctica'' Toula, 1875 * † ''Pleurotomaria arenaria'' Girty, 1908 * † ''Pleurotomaria awakinoensis'' Begg and Grant-Mackie, 2003 * † ''Pleurotomaria barrealensis'' (Cowper Reed, 1927) (synonym: ''Neoplatyteichum barrealensis'') * † ''Pleurotomaria bicoronata'' Sandberger and Sandberger, 1855 * † ''Pleurotomaria biondii'' Gemmellaro, 1889 * † ''Pleurotomaria bodana'' Roemer, 1855 * † ''Pleurotomaria brennensis'' Reed, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murex
''Murex'' is a genus of medium to large sized predatory tropical sea snails. These are carnivorous marine gastropod molluscs in the family Muricidae, commonly called "murexes" or "rock snails".Houart, R.; Gofas, S. (2010). Murex Linnaeus, 1758. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138196 on 2011-04-09 The common name murex is still used for many species in the family Muricidae which were originally given the Latin generic name ''Murex'' in the past, but have more recently been regrouped into different newer genera. The word ''murex'' was used by Aristotle in reference to these kinds of snails, thus making it one of the oldest classical seashell names still in use by the scientific community. Fossil records This genus is known in the fossil records from the Cretaceous to the Quaternary (age range: from 125.45 to 0.0 million ye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cypraea
''Cypraea'' is a genus of medium-sized to large sea snails or cowries, marine gastropod mollusks in the family Cypraeidae, the cowries. Species Species within the genus ''Cypraea'' include: * † '' Cypraea ficoides'' (Hutton, 1873) * '' Cypraea pantherina'' Lightfoot, 1786 * † '' Cypraea porcellus'' Brocchi, 1814 * ''Cypraea tigris'' Linnaeus, 1758 ;Nomen dubium: * ''Cypraea contrastriata'' Perry, 1811 (synonyms: ''Arestorides argus contrastriata'' (Perry, 1811); ''Cypraea argus contrastriata'' Perry, 1811; ''Talparia argus contrastriata'' (Perry, 1811) ) Synonyms Almost all species previously belonging to ''Cypraea'' have been reassigned to other genera within the family Cypraeidae: * ''Cypraea achatidea'' Sowerby, 1837: synonym of '' Schilderia achatidea'' * ''Cypraea acicularis'' Gmelin, 1791: synonym of '' Erosaria acicularis'' * ''Cypraea aenigma'' Lorenz, 2002: synonym of '' Nesiocypraea aenigma'' * ''Cypraea albuginosa'' Gray, 1825: synonym of '' Erosaria albugino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulimulus
''Bulimulus'' is a genus of small to medium-sized tropical or sub-tropical, air-breathing land snails, pulmonate gastropod mollusks in the subfamily Bulimulinae within the family Bulimulidae.Breure A. S. H. & Romero P. (2012). "Support and surprises: molecular phylogeny of the land snail superfamily Orthalicoidea using a three-locus gene analysis with a divergence time analysis and ancestral area reconstruction (Gastropoda: Stylommatophora)". '' Archiv für Molluskenkunde: International Journal of Malacology'' 141 (1): 1-20. MolluscaBase eds. (2020). MolluscaBase. Bulimulus Leach, 1814. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=861633 on 2020-06-21 ''Bulimulus'' is the type genus of the subfamily Bulimulinae. The shells are high and conical, and are medium-sized, ranging from about 20 mm (0.8 inches) to about 50 mm (2 inches) long. Species Species in the genus ''Bulimulus'' include: * '' Bulimulus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helicella
''Helicella'' is a genus of small to medium-sized, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Helicellinae of the family Geomitridae, the hairy snails and their allies. MolluscaBase eds. (2021). MolluscaBase. Helicella A. Férussac, 1821. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=153980 on 2021-02-01 Species Species within the genus ''Helicella'' include: , accessed 29 June 2010. * '' Helicella bolenensis'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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