Rissoellidae
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Rissoellidae
Rissoellidae are a family (biology), family of minute sea snails, marine (ocean), marine gastropod molluscs in the informal group Lower Heterobranchia. Rissoellidae is the only family within the superfamily Rissoelloidea in the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005. Genera Genera within the family Rissoellidae include: * ''Cythnia'' Carpenter, 1864Bouchet, P. (2015). ''Cythnia'' Carpenter, 1864. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=565658 on 2017-05-24 * ''Rissoella'' Gray, 1847 - synonyms: ''Heterorissoa'' Iredale, 1912; ''Jeffreysia'' Alder [in Forbes & Hanley], 1850 References External links * Arthur William Baden Powell, Powell A. W. B., ''New Zealand Mollusca'', HarperCollins, William Collins Publishers Ltd, Auckland, New Zealand 1979 ZipCodeZoo
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Rissoellidae
Rissoellidae are a family (biology), family of minute sea snails, marine (ocean), marine gastropod molluscs in the informal group Lower Heterobranchia. Rissoellidae is the only family within the superfamily Rissoelloidea in the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005. Genera Genera within the family Rissoellidae include: * ''Cythnia'' Carpenter, 1864Bouchet, P. (2015). ''Cythnia'' Carpenter, 1864. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=565658 on 2017-05-24 * ''Rissoella'' Gray, 1847 - synonyms: ''Heterorissoa'' Iredale, 1912; ''Jeffreysia'' Alder [in Forbes & Hanley], 1850 References External links * Arthur William Baden Powell, Powell A. W. B., ''New Zealand Mollusca'', HarperCollins, William Collins Publishers Ltd, Auckland, New Zealand 1979 ZipCodeZoo
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Rissoella
Rissoella is a genus of minute sea snails, marine (ocean), marine gastropods, in the family Rissoellidae. MolluscaBase eds. (2022). MolluscaBase. Rissoella Gray, 1847. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=138438 on 2022-04-15 Species According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus ''Rissoella'' Synonyms * ''Rissoella bakeri'' A. M. Strong, 1938: synonym of ''Elachisina bakeri'' (A. M. Strong, 1938) * ''Rissoella bifasciata'' (Carpenter, 1857): synonym of ''Barleeia bifasciata'' (Carpenter, 1856) * ''Rissoella californica'' Bartsch, 1927: synonym of ''Elachisina grippi'' Dall, 1918 * ''Rissoella duperrei'' (Vélain, 1877): synonym of ''Eatoniella duperrei'' (Vélain, 1877) * ''Rissoella excolpa'' Bartsch, 1920: synonym of ''Elachisina grippi'' Dall, 1918 * ''Rissoella glaber'' Gray, 1847: synonym of ''Rissoella glabra'' Gray, 1 ...
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Cythnia
''Cythnia'' is a genus of sea snails, marine gastropod mollusks in the family Rissoellidae Rissoellidae are a family (biology), family of minute sea snails, marine (ocean), marine gastropod molluscs in the informal group Lower Heterobranchia. Rissoellidae is the only family within the superfamily Rissoelloidea in the Taxonomy of the G .... Species There are only two known species to exist within this genus, these include the following: * '' Cythnia albida'' (Carpenter, 1864) * '' Cythnia asteriaphila'' (Carpenter, 1864) References Rissoellidae {{Heterobranchia-stub ...
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Rissoella Opalina
''Rissoella opalina'' is a species of sea snail, a marine gastropod mollusk in the family Rissoellidae. Distribution 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 (Grea .... References External links Rissoellidae Gastropods described in 1848 {{Heterobranchia-stub ...
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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 ...
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Heterobranchia
Heterobranchia, the ''heterobranchs'' (meaning "different-gilled snails"), is a taxonomic clade of snails and slugs, which includes marine, aquatic and terrestrial gastropod mollusks. Heterobranchia is one of the main clades of gastropods. Currently Heterobranchia comprises three informal groups: the lower heterobranchs, the opisthobranchs and the pulmonates.Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. ''Classification and nomenclator of gastropod families''. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. . . 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278 Diversity The three subdivisions of this large clade are quite diverse: * The Lower Heterobranchia includes shelled marine and freshwater species. * Opisthobranchia are almost all marine species, some shelled and some not. The internal organs of the opisthobranchs have undergone detorsion (unwinding of the visc ...
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Lower Heterobranchia
Lower Heterobranchia, also known as the Allogastropoda, is a group of rather specialized, highly evolved sea slugs and sea snails, ( marine gastropod mollusks) within the subclass Heterobranchia. WoRMS (2020). "Lower Heterobranchia". Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1054700 on 2020-05-16 Although the great majority of Lower Heterobranchs are indeed marine, a few have succeeded in making the transition to freshwater. Description The shell shapes in this group are typically those that are seen in the sundial, pyramid, rissoella and orbitestellid families of snails. Taxonomy 2005 taxonomy In the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005, the Lower Heterobranchia is an Informal Group. Superfamilies within the Lower Heterobranchia include: *Unassigned to a superfamily (orbitestellid-shells) ** Family Cimidae ** † Family Dolomitellidae ** † Family Heterosubulitidae ** † Family Kuskokwimiidae ** † Family Misurinellid ...
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John Edward Gray
John Edward Gray, FRS (12 February 1800 – 7 March 1875) was a British zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828). The same is used for a zoological name. Gray was keeper of zoology at the British Museum in London from 1840 until Christmas 1874, before the natural history holdings were split off to the Natural History Museum. He published several catalogues of the museum collections that included comprehensive discussions of animal groups and descriptions of new species. He improved the zoological collections to make them amongst the best in the world. Biography Gray was born in Walsall, but his family soon moved to London, where Gray studied medicine. He assisted his father in writing ''The Natural Arrangement of British Plants'' (1821). After being blackballed by the Linnean Society of London, Gray shifted his interest from botany to zoology. He began his zoologica ...
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Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ...
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Sea Snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example species in the genus '' Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large group of animals and a very diverse one. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide when they can move around in the air. These air-breathing species includ ...
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Marine (ocean)
The ocean (also the sea or the world ocean) is the body of salt water that covers approximately 70.8% of the surface of Earth and contains 97% of Earth's water. An ocean can also refer to any of the large bodies of water into which the world ocean is conventionally divided."Ocean."
''Merriam-Webster.com Dictionary'', Merriam-Webster, https://www.merriam-webster.com/dictionary/ocean. Accessed March 14, 2021.
Separate names are used to identify five different areas of the ocean: (the largest), ,

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Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ...
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