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Hydrobia Nannacus
''Hydrobia'' is a genus of very small brackish water snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.Gofas, S. (2011). Hydrobia Hartmann, 1821. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138081 on 2011-06-14 Species Species within the genus ''Hydrobia'' include: * † ''Hydrobia abbreviata'' (Grateloup, 1827) * † ''Hydrobia acheila'' Brusina, 1902 *''Hydrobia aciculina'' (Bourguignat, 1876) *''Hydrobia acuta'' ( Draparnaud, 1805) ** subspecies ''Hydrobia acuta neglecta'' Muus, 1963 - synonym: ''Hydrobia neglecta'' Muus, 1963 * † ''Hydrobia acutecarinata'' Neumayr in Neumayr & Paul, 1875 * † '' Hydrobia aitai'' Jekelius, 1932 * † '' Hydrobia alpha'' Jekelius, 1944 * † '' Hydrobia alutae'' Jekelius, 1932 * † '' Hydrobia andreaei'' Boettger in Degrange-Touzin, 1892 * † '' Hydrobia andrussowi'' Hilber, 1897 *'' Hydrobia antarctica'' Philippi, 1868 * † '' Hyd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, 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 (mollusc), 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 (mollusc), mantle. The calcareous central layer, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...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] |
Hydrobia Acutecarinata
''Hydrobia'' is a genus of very small brackish water snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.Gofas, S. (2011). Hydrobia Hartmann, 1821. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138081 on 2011-06-14 Species Species within the genus ''Hydrobia'' include: * † '' Hydrobia abbreviata'' (Grateloup, 1827) * † '' Hydrobia acheila'' Brusina, 1902 *'' Hydrobia aciculina'' (Bourguignat, 1876) *'' Hydrobia acuta'' ( Draparnaud, 1805) ** subspecies '' Hydrobia acuta neglecta'' Muus, 1963 - synonym: ''Hydrobia neglecta'' Muus, 1963 * † '' Hydrobia acutecarinata'' Neumayr in Neumayr & Paul, 1875 * † '' Hydrobia aitai'' Jekelius, 1932 * † '' Hydrobia alpha'' Jekelius, 1944 * † '' Hydrobia alutae'' Jekelius, 1932 * † '' Hydrobia andreaei'' Boettger in Degrange-Touzin, 1892 * † '' Hydrobia andrussowi'' Hilber, 1897 *'' Hydrobia antarctica'' Philippi, 1868 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrobia Acuta Neglecta
'' Hydrobia acuta neglecta'' is a European subspecies of small brackish water snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. Distribution This species which has a distribution type: oceanic temperate occurs on the coasts of the North Sea, in countries and islands including: * Iceland * Denmark * Sweden * Great Britain * Ireland * France Ecology ''Hydrobia acuta neglecta'' occurs in coastal lagoons where incoming freshwater dilutes sea water. The preferred salinity range is 10-24 ‰. Status The status of this taxon is uncertain. ''Hydrobia neglecta'' is treated as a full species in Fauna Europaea, but in 1995 it had been suggested that ''H. neglecta'' is a synonym of the Mediterranean ''Hydrobia acuta'' (Draparnaud). Then a ''neglecta'' colony in northern France was shown to be ''acuta''. In 2000 a molecular study concluded that north-west European populations were not specifically distinct from the Mediterranean ''Hydrobia a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacques Philippe Raymond Draparnaud
Jacques Philippe Raymond Draparnaud (3 June 1772, Montpellier – 2 February 1804) was a French naturalist, malacologist and botanist. Draparnaud is considered the father of malacology in France. He was professor of medicine and pathology at the Faculté de Médecine de Montpellier. Draparnaud understood the breadth of the fauna he studied, as can be seen in a quote from him, in ''Histoire Naturelle des Mollusques'', published in 1805:Au reste, quoique j'aie décrit pour la France seule un bien plus grand nombre d'espèces que Muller et Schroeter n'ent ont fait connoître pour l'Europe entière, et trois fois autant que Geoffroy et Poiret n'en ont observé dans les environs de Paris, je suis convaincu qu'il reste encore en ce genre bien des découvertes à faire. Translation: As for the remainder, even though I have described for France a greater number of species than Müller and Schroeter made known for the whole of Europe, and three times as many as Geoffroy and Poiret obs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrobia Acuta
''Hydrobia acuta'' is a species of very small (4-6mm.) brackish water snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. Description Draparnaud's description reads "Coquille ovale-oblongue, un peu conique, aiguë à son sommet,transparente, lisse, quoique marquée de légères stries lorsqu'on l'observe à la loupe. Dans son naturel elle une couleur verdàtre.La spire a six à sept tours. L'ouverture est ovale et le péristome simple.Fente ombilicale peu prononcée. Opercule mince et lisse. In English "Shell oval-oblong, slightly conical, acute at the top transparent, smooth, albeit marked with light streaks when it is observed under the microscope. In nature it is a greenish colour.The spire has six or seven whorls. The opening is oval and the peristome is simple.Little pronounced umbilical slot.Operculum thin and smooth. Subspecies * ''Hydrobia acuta neglecta'' Muus, 1963 Distribution This species occurs on the coasts of the Medit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrobia Aciculina
''Hydrobia'' is a genus of very small brackish water snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.Gofas, S. (2011). Hydrobia Hartmann, 1821. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138081 on 2011-06-14 Species Species within the genus ''Hydrobia'' include: * † '' Hydrobia abbreviata'' (Grateloup, 1827) * † '' Hydrobia acheila'' Brusina, 1902 *'' Hydrobia aciculina'' (Bourguignat, 1876) *''Hydrobia acuta'' ( Draparnaud, 1805) ** subspecies ''Hydrobia acuta neglecta'' Muus, 1963 - synonym: ''Hydrobia neglecta'' Muus, 1963 * † ''Hydrobia acutecarinata'' Neumayr in Neumayr & Paul, 1875 * † '' Hydrobia aitai'' Jekelius, 1932 * † '' Hydrobia alpha'' Jekelius, 1944 * † '' Hydrobia alutae'' Jekelius, 1932 * † '' Hydrobia andreaei'' Boettger in Degrange-Touzin, 1892 * † '' Hydrobia andrussowi'' Hilber, 1897 *'' Hydrobia antarctica'' Philippi, 1868 * † ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiridon Brusina
Spiridon Brusina (11 December 1845 – 21 May 1909) was a Croatian malacologist.Coan E. V., Kabat A. R. & Petit R. E. (15 February 2011)''2,400 years of malacology, 8th ed.'', 936 pp. + 42 pp. nnex of Collations American Malacological Society. (Listed as Špiridion Brusina with dates 1845-1908.) Together with Oton Kučera and Gjuro Pilar, he founded the Croatian Society of Natural Sciences in Zagreb Zagreb ( , , , ) is the capital (political), capital and List of cities and towns in Croatia#List of cities and towns, largest city of Croatia. It is in the Northern Croatia, northwest of the country, along the Sava river, at the southern slop ... in the late 1885. Taxa described * '' Drobacia'' Brusina, 1904 * '' Emmericia'' Brusina, 1870 * '' Erjavecia'' Brusina, 1870 * '' Manzonia'' Brusina, 1870 * '' Spelaeodiscus'' Brusina, 1886 * '' Vidovicia'' Brusina, 1904 * '' Trochulus erjaveci'' (Brusina, 1870) Bibliography ** Brusina S. (1865). "Conchiglie Dalmate Inedite" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrobia Acheila
''Hydrobia'' is a genus of very small brackish water snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.Gofas, S. (2011). Hydrobia Hartmann, 1821. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138081 on 2011-06-14 Species Species within the genus ''Hydrobia'' include: * † '' Hydrobia abbreviata'' (Grateloup, 1827) * † '' Hydrobia acheila'' Brusina, 1902 *''Hydrobia aciculina'' (Bourguignat, 1876) *''Hydrobia acuta'' ( Draparnaud, 1805) ** subspecies ''Hydrobia acuta neglecta'' Muus, 1963 - synonym: ''Hydrobia neglecta'' Muus, 1963 * † ''Hydrobia acutecarinata'' Neumayr in Neumayr & Paul, 1875 * † '' Hydrobia aitai'' Jekelius, 1932 * † '' Hydrobia alpha'' Jekelius, 1944 * † '' Hydrobia alutae'' Jekelius, 1932 * † '' Hydrobia andreaei'' Boettger in Degrange-Touzin, 1892 * † '' Hydrobia andrussowi'' Hilber, 1897 *'' Hydrobia antarctica'' Philippi, 1868 * † '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-Pierre Sylvestre De Grateloup
Jean-Pierre Sylvestre de Grateloup (31 December 1782 – 25 August 1862) was a French physician and naturalist. He completed his medical studies at Montpellier and remained attached to the countryside of the southwest of France. In company with his childhood friend Jean-Marie Léon Dufour (1780–1865) and Dufour's friend Jean-Baptiste Bory de Saint-Vincent (1778–1846) he expressed his enthusiasm for botany specializing in the study of cryptogams, the ferns and other plants that reproduce through spores. Then the shells found in the region attracted his attention, in particular those from the Adour.Grateloup, "Tableau des coquilles Fossiles qu'on rencontre dans des terrains calcaires tertiaires (faluns) des environs de Dax" in ''Actes de la Société linnéenne de Bordeaux'', 183;: ''Mémoire de géo-zoologie sur les oursins fossiles (échinides) qui se rencontrent dans les terrains caleaires des environs de Dax'', 1836; Conchyliologie fossile des terrains tertiaires du bassin d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrobia Abbreviata
''Hydrobia'' is a genus of very small brackish water snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.Gofas, S. (2011). Hydrobia Hartmann, 1821. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138081 on 2011-06-14 Species Species within the genus ''Hydrobia'' include: * † '' Hydrobia abbreviata'' (Grateloup, 1827) * † ''Hydrobia acheila'' Brusina, 1902 *''Hydrobia aciculina'' (Bourguignat, 1876) *''Hydrobia acuta'' ( Draparnaud, 1805) ** subspecies ''Hydrobia acuta neglecta'' Muus, 1963 - synonym: ''Hydrobia neglecta'' Muus, 1963 * † ''Hydrobia acutecarinata'' Neumayr in Neumayr & Paul, 1875 * † '' Hydrobia aitai'' Jekelius, 1932 * † '' Hydrobia alpha'' Jekelius, 1944 * † '' Hydrobia alutae'' Jekelius, 1932 * † '' Hydrobia andreaei'' Boettger in Degrange-Touzin, 1892 * † '' Hydrobia andrussowi'' Hilber, 1897 *'' Hydrobia antarctica'' Philippi, 1868 * † '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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