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Echiuroidea
Echiuroidea is an order of annelids in the class Polychaeta. Families *Suborder Bonelliida **Bonelliidae Lacaze-Duthiers, 1858Lacaze-Duthiers, H. (1858). Recherches sur la bonellie (''Bonellia viridis'') (1). ''Annales des Sciences Naturells, Comprenant la Zoologie, la Botanique, l'Anatomie, et la Physiologie Comparées des Deux Règnes, et l'Histoire des Corps Organisés Fossiles'', 4(10), 49–110. **Ikedidae Bock, 1942Bock, S. (1942). ''On the Structure and Affinities of ''Thalassema lankesteri'' Herdman and the Classification of the Group Echiuroidea''. Göteborg: Elanders. *Suborder Echiurida **Echiuridae de Quatrefages, 1847de Quatrefages, M. A. (1847). Études sur les types inférieurs de l'embranchment des annelés. Mémoire sur l'Echiure de Gærtner (''Echiurus gærtnerii'' Nob.). ''Annales des Sciences Naturells, Comprenant la Zoologie, la Botanique, l'Anatomie, et la Physiologie Comparées des Deux Règnes, et l'Histoire des Corps Organisés Fossiles'', 3(7), 307–343. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echiurans
The Echiura, or spoon worms, are a small group of marine animals. Once treated as a separate phylum, they are now considered to belong to Annelida. Annelids typically have their bodies divided into segments, but echiurans have secondarily lost their segmentation. The majority of echiurans live in burrows in soft sediment in shallow water, but some live in rock crevices or under boulders, and there are also deep sea forms. More than 230 species have been described. Spoon worms are cylindrical, soft-bodied animals usually possessing a non-retractable proboscis which can be rolled into a scoop-shape to feed. In some species the proboscis is ribbon-like, longer than the trunk and may have a forked tip. Spoon worms vary in size from less than a centimetre in length to more than a metre. Most are deposit feeders, collecting detritus from the sea floor. Fossils of these worms are seldom found and the earliest known fossil specimen is from the Upper Carboniferous (Pennsylvanian). Ta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Kenrick Fisher
Walter Kenrick Fisher (February 1, 1878 – November 2, 1953) was an American zoologist, evolutionary biologist, illustrator and painter. He taught in Stanford University before eventually becoming Emeritus Professor in Zoology until his retirement in 1943. Fisher was the son of ornithologist Albert Kenrick Fisher. Early life Walter K. Fisher was born on February 1, 1878 in Ossining, New York. His father was Albert Kenrick Fisher and his mother was Alwilda Fisher (''née'' Merritt). As a boy, Fisher explored the countryside around his home in the Hudson Valley, and when he was older conducted similar explorations around Washington, D. C. following his family's move to the capital. During these ventures he collected birds and plants, and he drew sketches of the skulls he collected and of the landscapes. He was a talented artist and was initially tempted to follow his artistic side, and he continued to paint and draw throughout his life, but he decided that he wanted to follow a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bonelliida
Bonelliida is a suborder of the order Echiuroidea, an order of polychaete worms. Families The following families are classified within the suborder: * Bonelliidae Lacaze-Duthiers, 1858 * Ikedidae Bock Bock is a strong beer in Germany, usually a dark lager. Several substyles exist, including: *Doppelbock (''Double Bock''), a stronger and maltier version *Eisbock (''Ice Bock''), a much stronger version made by partially freezing the beer an ..., 1942 References {{Taxonbar, from=Q10432880 Echiurans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echiurida
Echiurida is a suborder of the order Echiuroidea, an order of polychaete worms. Families The following families are classified within the suborder: * Echiuridae Quatrefages, 1847 * Thalassematidae Forbes & Goodsir, 1841 * Urechidae Monro Monro is a surname, and may refer to: In science and education * Alexander Monro (primus), the founder of Edinburgh Medical School * Alexander Monro (secundus), Scottish anatomist, physician and medical educator * Alexander Monro (tertius) (1773� ..., 1927 References {{Taxonbar, from=Q18668416 Echiurans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bonellia Viridis
''Bonellia viridis'', the green spoonworm, is a marine worm (class Polychaeta , phylum Annelida) noted for displaying exceptional sexual dimorphism and for the biocidal properties of a pigment in its skin.Murina, G. (2008). Bonellia viridis Rolando, 1821. In: Read, G.; Fauchald, K. (Ed.) (2016). World Polychaeta database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=110363 on 2016-05-28 Distribution The species is wide-ranging, found in the north-eastern Atlantic Ocean and the Mediterranean Sea. Description The pale- to dark-green female, with a 15 cm-long, round or sausage-shaped body, lives on the sea-floor at a depth of 10 to 100 metres, concealed by burrowing in gravel or hiding in rock crevasses or burrows abandoned by other animals. It has two anchoring hooks underneath its body and an extensible feeding proboscis up to 10 times its body-length. It is mainly a detritivore, feeding also on small animals. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order ( la, ordo) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order. An order can also be defined as a group of related families. What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order. Some taxa are accepted almost universally, while others are recognized only rarely. The name of an order is usually written with a capital letter. For some groups of organisms, their orders may follo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annelid
The annelids (Annelida , from Latin ', "little ring"), also known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class (biology)
In biological classification, class ( la, classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. It is a group of related taxonomic orders. Other well-known ranks in descending order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class fitting between phylum and order. History The class as a distinct rank of biological classification having its own distinctive name (and not just called a ''top-level genus'' ''(genus summum)'') was first introduced by the French botanist Joseph Pitton de Tournefort in his classification of plants that appeared in his ''Eléments de botanique'', 1694. Insofar as a general definition of a class is available, it has historically been conceived as embracing taxa that combine a distinct ''grade'' of organization—i.e. a 'level of complexity', measured in terms of how differentiated their organ systems are into distinct regions or sub-organs—with a distinct ''type'' of construc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychaete
Polychaeta () is a paraphyletic class of generally marine annelid worms, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm (''Arenicola marina'') and the sandworm or clam worm ''Alitta''. Polychaetes as a class are robust and widespread, with species that live in the coldest ocean temperatures of the abyssal plain, to forms which tolerate the extremely high temperatures near hydrothermal vents. Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe ''Nereus'' at the bottom of the Challenger Deep, the deepest known spot in the Earth's oceans. Only 168 species (less than 2% of all polychaetes) are known from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bonelliidae
Bonelliidae is a family of marine worms (Class Echiura, phylum Annelida) noted for being sexually dimorphic, with males being tiny in comparison with the females. They occupy burrows in the seabed in many parts of the world's oceans, often at great depths. Characteristics Members of the class Echiura are plump, unsegmented worms, commonly known as spoonworms. The mouth is at the anterior end of the trunk and a flattened proboscis extends forward in front of the mouth. The ventral side of the proboscis has a ciliated channel along which food particles and mucus are moved towards the mouth. Close behind the mouth are two hooked chaetae and one or two nephridial pores. The gut is much longer than the body and is folded and coiled inside the coelom (body cavity). The anus is at the posterior end of the body and two anal vesicles with ciliated funnels open into the cloaca. In the family Bonelliidae, the females are very much larger than the dwarf males, and in most, if not all, inst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ikedidae
Ikedidae is a family of spoon worms in the suborder Bonelliida. It is a monotypic family, the only genus being ''Ikeda''. These worms burrow into soft sediment on the seabed. Examination of the original material of '' Ikeda taenoides'' by Teruaki Nishikawa in 2002 showed that the longitudinal muscle layer lay between the circular layer and the oblique layer, as in all other echiurans, throwing the validity of the family Ikedidae into doubt. Nishikawa advocates that the family be regarded as a junior synonym of Echiuridae. Species The World Register of Marine Species recognises the following species in the genus:- *''Ikeda pirotansis'' ( Menon & DattaGupta, 1962) *''Ikeda taenioides ''Ikeda taenioides'' is a species of spoon worm in the family Ikedidae. It is native to the northern Pacific Ocean where it is found in the subtidal waters around Japan. Taxonomy This spoon worm was first described by the Japanese zoologist I. ...'' ( Ikeda, 1904) References {{Taxonbar, fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echiuridae
Echiuridae is a family of spoon worms in the suborder Echiurida. It is a monotypic family, the only genus being ''Echiurus''. These worms burrow into soft sediment on the seabed. Species The World Register of Marine Species recognises the following species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ... in the genus:- * '' Echiurus abyssalis'' Skorikow, 1906 * '' Echiurus antarcticus'' Spengel, 1912 * '' Echiurus echiurus'' (Pallas, 1766) * '' Echiurus sitchaensis'' Brandt, 1835 References {{Taxonbar, from=Q2809389 Echiurans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
