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Cystiscidae
Cystiscidae is a taxonomic family of minute sea snails, marine gastropod mollusks or micromollusks. Description The shell is minute to large, either white, uniformly colored, or patterned; the surface is smooth, sculptured, or axially costate; the spire is flat to immersed, or low to tall; the protoconch is paucispiral; the lip is thickened, smooth or denticulate; an external varix is present or absent; a siphonal notch is present or absent; a posterior notch is present or absent; the columella is multiplicate, internal whorls cystiscid or modified cystiscid type. Mantle cavity with monopectinate ctenidium and bipectinate osphradium. Proboscis pleurembolic; jaws absent; typical radular sac present. Taxonomy The family was erected by William Stimpson for a single included species based on unusual features of the head and radula. Subsequent authors included this group in the family Marginellidae. Coan (1965) recognized this group as a subfamily, but he did not include such gener ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystiscinae
Cystiscinae are a taxonomic subfamily of minute sea snails. These are marine gastropod mollusks or micromollusks in the family Cystiscidae, and the clade Neogastropoda. Diagnosis Shell minute to small, white; spire immersed to low; surface smooth or axially costate; lip thickened, smooth or denticulate; external varix A varix (pl. varices) is an abnormally dilated vessel with a tortuous course. Varices usually occur in the venous system, but may also occur in arterial or lymphatic vessels. Examples of varices include: * Varicose veins, large tortuous veins usua ... absent; siphonal notch absent; posterior notch absent; columella multiplicate, with combined total of usually 2 to 8 plications plus parietal lirae; internal Whorl (mollusc), whorls cystiscid type. Animal Mantle (mollusc), mantle smooth, at least partially extending over external shell surface. Internal anatomy unknown. Genera Genera within the subfamily Cystiscinae are as follows: *''Crithe'' Augustus Addison Go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gibberula Celerae
''Gibberula celerae'' is a species of very small sea snail, a marine gastropod mollusc or micromollusc in the family Cystiscidae. Description The length of the shell attains 2.02 mm. Distribution This species occurs in the Caribbean Sea off Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th .... References External links * celerae Gastropods described in 2008 {{Cystiscidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canalispira
''Canalispira'' is a genus of very small sea snails, marine gastropod mollusks or micromollusks in the family Cystiscidae. Species Species within the genus ''Canalispira'' include: *'' Canalispira attentia'' ( Laseron, 1957) *'' Canalispira aurea'' Garcia, 2006 * '' Canalispira columellaria'' Boyer, 2018 *'' Canalispira fallax'' ( Smith, 1903) *'' Canalispira infirma'' ( Laseron, 1957) *'' Canalispira kerni'' Garcia, 2007 *'' Canalispira lipei'' Garcia, 2007 *'' Canalispira minor'' ( Dall, 1927) *'' Canalispira olivellaeformis'' Jousseaume, 1875 *''Canalispira replicata'' (Melvill Melville is a surname and a given name. The surname has two different origins: Scottish and Irish. In Scotland, the name is a habitational name, originally of Norman origin, derived from any of several places called Malleville in Normandy. The p ..., 1912) *'' Canalispira shacklefordi'' (Preston, 1915) *'' Canalispira umuhlwa'' Kilburn, 1990 ;Species brought into synonymy: * ''Canalispira fluctuata ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Persiculinae
''Persiculinae'' is a taxonomic subfamily of minute to small predatory sea snails, marine gastropod mollusks. This subfamily includes several species which are micromollusks. Taxonomy The subfamily is sometimes placed in the family Cystiscidae, and is sometimes instead left in the family Marginellidae the margin snails. It is within the clade Neogastropoda. (Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.) In 2019 this subfamily has been classified as a synonym of the subfamily Cystiscinae Stimpson, 1865 Shell description The shell minute to large, white, uniformly colored, or patterned; spire immersed or low to tall; lip thickened, smooth or lirate; external varix present or absent; siphonal notch present or absent; weak to distinct posterior notch present; co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plesiocystiscinae
Plesiocystiscinae is a subfamily of minute sea predatory sea snails, marine gastropod mollusks or micromollusks in the infraorder Neogastropoda. The genus name on which this subfamily name is based is derived from the Greekword ''plesios'', near, in the sense of plesiomorphic, in other words having characters close to those of the ancestor, combined with ''Cystiscus'' the name of a closely related genus. Sometimes the single genus in this subfamily is simply left in the larger family Marginellidae. (Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.) Shell description Shell minute to small, white, hyaline; last whorl rapidly expanded then lip abruptly swept posteriorly giving characteristic shape; spire flat to low; lip thickened posteriorly, smooth, lacking lirae or ... [...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] |
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] |
The Nautilus (journal)
''The Nautilus'' is a peer-reviewed scientific journal covering research in malacology. Hence its scope includes all aspects of the biology, ecology, and systematics of mollusks."THE NAUTILUS A Quarterly Devoted to Malacology" . accessed 19 April 2011. The first two volumes were published by shell trader William D. Averell (1853-1928) under the name ''The Conchologists’ Exchange''.Leal J. H. (2006). "Celebrating a long life: The Nautilus turns 120!". ''The Nautilus'' 120(1): 1-7 From 1958 to 1972, the subtitle of ''The Nautilus'' was "The Pilsbry Quarter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Type
In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the International Code of Nomenclature for algae, fungi, and plants (ICN), the scientific name of every taxon is almost al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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