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Nebalia Herbstii
''Nebalia herbstii'' is a leptostracan found in the north east Atlantic, including Galway Bay, Ireland. It is found in the intertidal zone The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species o ... in sandy and rocky shores. Total lengths are usually in the range of . ''N. herbstii'' can be distinguished from other '' Nebalia'' species by a combination of characters: *The denticles of pleon 6 and 7 are fairly short, rounded to obtusely pointed but never drawn out to acute constricted points. *The length of the telson is longer than the length of pleon 7. *A major feature are the anal scales located beneath the telson and furca. They have a short point over the centre of the scale with an indistinct “shoulder” which slopes steeply. *The thoracopods have endopods which are long and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Elford Leach
William Elford Leach Royal Society, FRS (2 February 1791 – 25 August 1836) was an English zoologist and marine biologist. Life and work Elford Leach was born at Hoe Gate, Plymouth, the son of an attorney. At the age of twelve he began a medical apprenticeship at the Royal Devon and Exeter Hospital, Devonshire and Exeter Hospital, studying anatomy and chemistry. By this time he was already collecting marine animals from Plymouth Sound and along the Devon coast. At seventeen he began studying medicine at St Bartholomew's Hospital in London, finishing his training at the University of Edinburgh before graduating Doctor of Medicine, MD from the University of St Andrews (where he had never studied). From 1813 Leach concentrated on his zoological interests and was employed as an 'Assistant Librarian' (what would later be called Assistant Keeper) in the Natural History Museum, London, Natural History Department of the British Museum, where he had responsibility for the zoological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptostraca
Leptostraca (from the Greek words for ''thin'' and ''shell'') is an order of small, marine crustaceans. Its members, including the well-studied ''Nebalia'', occur throughout the world's oceans and are usually considered to be filter-feeders. It is the only extant order in the subclass Phyllocarida. They are believed to represent the most primitive members of their class, the Malacostraca, and first appear in the fossil record during the Cambrian period. Description Leptostracans are usually small, typically long, crustaceans distinguished from all other members of their class in having seven abdominal segments, instead of six. Their head has stalked compound eyes, two pairs of antennae (one biramous, one uniramous), and a pair of mandibles but no maxillipeds. The carapace is large and comprises two valves which cover the head and the thorax, including most of the thoracic appendages, and serves as a brood pouch for the developing embryos. The first six abdominal segments bea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe and Asia from the "New World" of the Americas in the European perception of the World. The Atlantic Ocean occupies an elongated, S-shaped basin extending longitudinally between Europe and Africa to the east, and North and South America to the west. As one component of the interconnected World Ocean, it is connected in the north to the Arctic Ocean, to the Pacific Ocean in the southwest, the Indian Ocean in the southeast, and the Southern Ocean in the south (other definitions describe the Atlantic as extending southward to Antarctica). The Atlantic Ocean is divided in two parts, by the Equatorial Counter Current, with the North(ern) Atlantic Ocean and the South(ern) Atlantic Ocean split at about 8°N. Scientific explorations of the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galway Bay
Galway Bay (Irish: ''Loch Lurgain'' or ''Cuan na Gaillimhe'') is a bay on the west coast of Ireland, between County Galway in the province of Connacht to the north and the Burren in County Clare in the province of Munster to the south; Galway city is on the northeast side. The bay is about long and from to in breadth. The Aran Islands (''Oileáin Árann'') are to the west across the entrance and there are numerous small islands within the bay. To the west of Galway, the rocks are granite but to the south they are limestone. The approaches to the bay between the Aran Islands and the mainland are as follows: * the North Sound (''An Súnda ó Thuaidh'') lies between Inishmore and Leitir Mealláin in Connemara; known as ''Bealach Locha Lurgan'' in Irish. * Gregory's Sound (''Súnda Ghríoghóra'') lies between Inishmore and Inishmaan; known as ''Bealach na h-Áite'' in Irish. * Foul Sound (''An Súnda Salach'') lies between Inishmaan and Inisheer; known as ''Bealach na Fear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ireland
Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Great Britain and Ireland), North Channel, the Irish Sea, and St George's Channel. Ireland is the List of islands of the British Isles, second-largest island of the British Isles, the List of European islands by area, third-largest in Europe, and the List of islands by area, twentieth-largest on Earth. Geopolitically, Ireland is divided between the Republic of Ireland (officially Names of the Irish state, named Ireland), which covers five-sixths of the island, and Northern Ireland, which is part of the United Kingdom. As of 2022, the Irish population analysis, population of the entire island is just over 7 million, with 5.1 million living in the Republic of Ireland and 1.9 million in Northern Ireland, ranking it the List of European islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intertidal Zone
The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species of life, such as seastars, sea urchins, and many species of coral with regional differences in biodiversity. Sometimes it is referred to as the ''littoral zone'' or '' seashore'', although those can be defined as a wider region. The well-known area also includes steep rocky cliffs, sandy beaches, bogs or wetlands (e.g., vast mudflats). The area can be a narrow strip, as in Pacific islands that have only a narrow tidal range, or can include many meters of shoreline where shallow beach slopes interact with high tidal excursion. The peritidal zone is similar but somewhat wider, extending from above the highest tide level to below the lowest. Organisms in the intertidal zone are adapted to an environment of harsh extremes, living in water pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nebalia
''Nebalia'' is a large genus of small crustaceans containing more than half of the species in the order Leptostraca, and was first described by William Elford Leach in 1814. The genus contains over thirty species: *'' Nebalia abyssicola'' Ledoyer, 1997 *'' Nebalia antarctica'' Dahl, 1990 *'' Nebalia biarticulata'' Ledoyer, 1997 *''Nebalia bipes'' (Fabricius, 1780) *'' Nebalia borealis'' Dahl, 1985 *'' Nebalia brucei'' Olesen, 1999 *'' Nebalia cannoni'' Dahl, 1990 *'' Nebalia capensis'' Barnard, 1914 *''Nebalia clausi'' Dahl, 1985 *'' Nebalia dahli'' Kazmi & Tirmizi, 1989 *'' Nebalia daytoni'' Vetter, 1996 *'' Nebalia falklandensis'' Dahl, 1990 *''Nebalia geoffroyi'' Milne-Edwards, 1928 *''Nebalia gerkenae'' Haney & Martin, 2000 *'' Nebalia herbstii'' Leach, 1814 *''Nebalia hessleri'' Martin, Vetter & Cash-Clark, 1996 *''Nebalia ilheoensis'' Kensley, 1976 *''Nebalia kensleyi'' Haney & Martin, 2005 *''Nebalia kocatasi'' Moreira, Kocak & Katagan, 2007 *''Nebalia lagartensis'' Escoba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarsia
''Sarsia'' is a genus of hydrozoan in the family Corynidae. Species * '' Sarsia angulata'' (Mayer, 1900) * '' Sarsia apicula'' (Murbach & Shearer, 1902) * ''Sarsia bella'' Brinckmann-Voss, 2000 * '' Sarsia brachygaster'' Grönberg, 1898 * '' Sarsia conica'' (Haeckel, 1880) * ''Sarsia densa'' (Hartlaub, 1897) * '' Sarsia erythrops'' Romanes, 1876 * '' Sarsia frutescens'' (Allman, 1872) * '' Sarsia hargitti'' Mayer, 1910 * '' Sarsia lovenii'' (M. Sars, 1846) * '' Sarsia medelae'' Gili, Lopez-Gonzalez & Bouillon, 2006 * ''Sarsia minima'' von Lendenfeld, 1885 * ''Sarsia nana'' Stechow, 1923 * ''Sarsia occidentalis'' (Fewkes, 1899) * ''Sarsia occulta'' Edwards, 1978 * ''Sarsia ocellata'' Busch, 1851 * ''Sarsia piriforma'' Edwards, 1983 * ''Sarsia princeps'' (Haeckel, 1879) * ''Sarsia pulchella'' (Allman, 1865) * ''Sarsia pulchella'' Forbes, 1848 * ''Sarsia striata'' Edwards, 1983 * ''Sarsia tubulosa'' (M. Sars, 1835) * ''Sarsia turricula'' McCrady, 1859 * ''Sarsia viridis ''Sarsia' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telson
The telson () is the posterior-most division of the body of an arthropod. Depending on the definition, the telson is either considered to be the final segment of the arthropod body, or an additional division that is not a true segment on account of not arising in the embryo from teloblast areas as other segments. It never carries any appendages, but a forked "tail" called the caudal furca may be present. The shape and composition of the telson differs between arthropod groups. Crustaceans In lobsters, shrimp and other decapods, the telson, along with the uropods, forms the tail fan. This is used as a paddle in the caridoid escape reaction ("lobstering"), whereby an alarmed animal rapidly flexes its tail, causing it to dart backwards. Krill can reach speeds of over 60 cm per second by this means. The trigger time to optical stimulus is, in spite of the low temperatures, only 55 milliseconds. In the Isopoda and Tanaidacea (superorder Peracarida), the last abdominal b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleopods
The decapod (crustaceans such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon ( abdomen). Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail: Cephalothorax Head #antennules # antennae # mandibles # first maxillae # second maxillae The head also bears the (usually stalked) compound eyes. The distal portion of a mandible or maxilla which has a sensory function is known as a palp. Thorax / pereon #first maxillipeds #second maxillipeds #third maxillipeds #first pereiopods #second pereiopods #third pereiopods #fourth pereiopods #fifth pereiopods Maxillipeds are appendages modified to function as mouthparts. Particularly in the less advanced decapods, these can be very similar to the pereiopods. Pereiopods are primarily walking legs and are also used for gathering food. They are also the ten legs from which deca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptostraca
Leptostraca (from the Greek words for ''thin'' and ''shell'') is an order of small, marine crustaceans. Its members, including the well-studied ''Nebalia'', occur throughout the world's oceans and are usually considered to be filter-feeders. It is the only extant order in the subclass Phyllocarida. They are believed to represent the most primitive members of their class, the Malacostraca, and first appear in the fossil record during the Cambrian period. Description Leptostracans are usually small, typically long, crustaceans distinguished from all other members of their class in having seven abdominal segments, instead of six. Their head has stalked compound eyes, two pairs of antennae (one biramous, one uniramous), and a pair of mandibles but no maxillipeds. The carapace is large and comprises two valves which cover the head and the thorax, including most of the thoracic appendages, and serves as a brood pouch for the developing embryos. The first six abdominal segments bea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By William Elford Leach
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the intro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
