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Uncancylus
''Uncancylus'' is a genus of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails and their allies. Anatomy These animals have a pallial lung, as do all pulmonate snails, but they also have a false gill or "pseudobranch" which can serve perfectly well as a gill when they are unable to reach the surface for air. Species Species within the genus ''Uncancylus'' include:IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2 Downloaded on 06 May 2014. * ''Uncancylus concentricus ''Uncancylus concentricus'' is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc in the family Planorbidae, the ram's horn snails and their allies. Distribution ''U. concentricus'' occurs in Costa Ri ...'' (d'Orbigny, 1835) * '' Uncancylus crequi'' (Bavay, 1904) * '' Uncancylus foncki'' (Philippi, 1866) * '' Uncancylus patagonicus '' (Biese, 1948) References Plano ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncancylus Patagonicus
''Uncancylus'' is a genus of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails and their allies. Anatomy These animals have a pallial lung, as do all pulmonate snails, but they also have a false gill or "pseudobranch" which can serve perfectly well as a gill when they are unable to reach the surface for air. Species Species within the genus ''Uncancylus'' include:IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2 Downloaded on 06 May 2014. * ''Uncancylus concentricus ''Uncancylus concentricus'' is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc in the family Planorbidae, the ram's horn snails and their allies. Distribution ''U. concentricus'' occurs in Costa Ri ...'' (d'Orbigny, 1835) * '' Uncancylus crequi'' (Bavay, 1904) * '' Uncancylus foncki'' (Philippi, 1866) * '' Uncancylus patagonicus '' (Biese, 1948) References Plano ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncancylus Crequi
''Uncancylus'' is a genus of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails and their allies. Anatomy These animals have a pallial lung, as do all pulmonate snails, but they also have a false gill or "pseudobranch" which can serve perfectly well as a gill when they are unable to reach the surface for air. Species Species within the genus ''Uncancylus'' include:IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2 Downloaded on 06 May 2014. * ''Uncancylus concentricus'' (d'Orbigny, 1835) * '' Uncancylus crequi'' (Bavay, 1904) * '' Uncancylus foncki'' (Philippi, 1866) * ''Uncancylus patagonicus ''Uncancylus'' is a genus of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails and their allies. Anatomy These animals have a pallial lung, as do all pulmonate s ...'' (Biese, 1948) References Planor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncancylus Concentricus
''Uncancylus concentricus'' is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc in the family Planorbidae, the ram's horn snails and their allies. Distribution ''U. concentricus'' occurs in Costa Rica, Puerto Rico, Colombia, Argentina, Chile, Brazil, Paraguay and Uruguay. The species' type locality, according to d'Orbigny (1835), is close to Montevideo, near the island ''Isla de Ratas'', at the mouth of the Río de la Plata. Description ''U. concentricus'' has a high, thin, transparent shell, with growth lines and radial ribs, which may in certain cases appear somewhat fuzzy, especially when it inhabits torrential environments. The apex is acute, quite recurved, moved back from the midpoint and flexed on the right side. The aperture is oval, broad, with somewhat wavy edges. The colour is typically light brown to tawny. The radula has a central bicuspid tooth, with the left cusp predominating and hinting at the birth of two others, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncancylus Foncki
''Uncancylus foncki'' is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc in the family Planorbidae, the ram's horn snails and their allies. Taxonomic notes Some authors consider ''U. foncki'' a synonym of ''U. concentricus'' due to the similarity of their shell shapes. Distribution ''U. foncki'' is endemic to Chile, where it occurs in lake Llanquihue and the Maullín river, which originates as the outflow of the lake, in the Llanquihue province. The type locality of the species is lake Llanquihue. ''U. foncki'' is known only from museum specimens. Attempts to locate the species in its type locality and the surrounding areas, so as to confirm its identity, have failed. Description ''U. foncki'' has a high, wide shell with an elliptical aperture. The apex is acute but not sharp, as in ''U. concentricus'', located slightly to the right of the midline, dorsally flattened and bent to the right but not reaching the edge o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancylini
Ancylini is a tribe of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies. This tribe used to be treated as a family; the current taxonomic placement within Planorbidae is according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). Anatomy These animals have a pallial lung, as do all pulmonate snails, but they also have a false gill or "pseudobranch" which can serve perfectly well as a gill in situations where the limpet is unable to reach the surface for air, as is often the case. Genera Genera in the tribe Ancylini include: * ''Ancylus'' Müller, 1773 - type genus * '' Pseudancylus'' * '' Rhodocephala'' * ''Ferrissia'' Walker, 1903 * '' Rhodacmea'' Walker, 1917 * '' Sineancylus'' Gutiérrez Gregoric, 2014 * '' Anisancylus'' Pilsbry & Vanatta, 1924 * '' Burnupia'' Walker, 1912 * '' Gundlachia'' Pfeiffer, 1849 * '' Hebetancylus'' Pilsbry, 1914 * '' Laevapex'' Walker, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limpet
Limpets are a group of aquatic snails that exhibit a conical shell shape (patelliform) and a strong, muscular foot. Limpets are members of the class Gastropoda, but are polyphyletic, meaning the various groups called "limpets" descended independently from different ancestral gastropods. This general category of conical shell is known as "patelliform" (dish-shaped). All members of the large and ancient marine clade Patellogastropoda are limpets. Within that clade, the members of the Patellidae family in particular are often referred to as "true limpets". Other groups, not in the same family, are also called limpets of one type or another, due to the similarity of their shells' shape. Examples include the Fissurellidae ("keyhole limpet") family, which is part of the Vetigastropoda clade (many other members of the Vetigastropoda do not have the morphology of limpets) and the Siphonariidae ("false limpets"), which use a siphon to pump water over their gills. Behaviour and ecolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redalyc
The Redalyc project (''Red de Revistas Científicas de América Latina y El Caribe, España y Portugal'') is a bibliographic database and a digital library of Open Access journals, supported by the Universidad Autónoma del Estado de México with the help of numerous other higher education institutions and information systems. The project started in October 2002 with the general aim of building a scientific information system made up by the leading journals of all the knowledge areas edited in and about Latin America. Since its creation, its goal is: to give visibility to the scientific production generated in Ibero-America, that is underestimated worldwide due to various factors like low investment in science and technology, low participation of Latin American scientists in some of the main currents of science, as measured by percentage of articles by Latin American authors in established electronic databases e.g., MEDLINE, and the low impact of that production. Participation, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill
A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment. Branchia (pl. branchiae) is the zoologists' name for gills (from Ancient Greek ). With the exception of some aquatic insects, the filaments and lamellae (folds) contain blood or coelomic fluid, from which gases are exchanged through the thin walls. The blood carries oxygen to other parts of the body. Carbon dioxide passes from the blood through the thin gill tissue into the water. Gills or gill-like organs, located in different parts of the body, are found in various groups of aquatic animals, including mollusks, crustaceans, insects, fish, and amphibians. Semiterrestrial marine animals such as crabs and mudskippers have gill cham ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudobranch
The pseudobranch, also pseudobranchia is the reduced first gill arch of a fish (on the inner surface of the opercle, near the junction of the preopercle) as well as a reduced "false" gill in some gastropods. In teleost fish, the pseudobranchs are mostly without respiratory function, and in elasmobranch Elasmobranchii () is a subclass of Chondrichthyes or cartilaginous fish, including sharks (superorder Selachii), rays, skates, and sawfish (superorder Batoidea). Members of this subclass are characterised by having five to seven pairs of g ...s they are the gill arch of the spiracle. The function of the pseudobranch is unknown, but it is believed that it supplies highly oxygenated blood to the optic choroid and retina and may have baroreceptor (pressure) and thermoregulation functions. It may also be a site of oxygen chemoreception. External links Picture of trout pseudobranchPseudobranch description incl. picture References Fish anatomy {{vertebrate-anatomy-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusc
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 gastropods ... [...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] |
Pulmonate
Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includes many land and freshwater families, and several marine families. The taxon Pulmonata as traditionally defined was found to be polyphyletic in a molecular study per Jörger ''et al.'', dating from 2010. Pulmonata are known from the Carboniferous Period to the present. Pulmonates have a single atrium and kidney, and a concentrated, symmetrical, nervous system. The mantle cavity is located on the right side of the body, and lacks gills, instead being converted into a vascularised lung. Most species have a shell, but no operculum, although the group does also include several shell-less slugs. Pulmonates are hermaphroditic, and some groups possess love darts. Linnean taxonomy The taxonomy of this group according to the taxonomy of the Ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
