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Granigyra Inflata
''Granigyra inflata'' is a species of sea snail in the superfamily Seguenzioidea. Description The size of the shell varies between . Distribution This species occurs in the Atlantic Ocean off Spain, Portugal, and Iceland Reykjanes Ridge. References * Jeffreys J. G., 1878–1885: ''On the mollusca procured during the H. M. S. "Lightning" and "Porcupine" expedition''; Proceedings of the Zoological Society of London; Part 1 (1878): 393–416 pl. 22–23. Part 2 (1879): 553–588 pl. 45–46 ctober 1879 Part 3 (1881): 693–724 pl. 61. Part 4 (1881): 922–952 pl. 70–71 882 Part 5 (1882): 656–687 pl. 49–50 883 __NOTOC__ Year 883 ( DCCCLXXXIII) was a common year starting on Tuesday of the Julian calendar. Events By place Europe * Spring – Viking raiders ravage Flanders, and sack the abbey at Saint-Quentin. King Carloman II blocks thei ... Part 6 (1883): 88–115 pl. 19–20. Part 7 (1884): 111–149 pl. 9–10. Part 8 (1884): 341–372 pl. 26–28. Par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Snail
Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible Gastropod shell, 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 Neritidae, 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 (gastropod), Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large and diverse group of animals. 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 w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superfamily (biology)
In biology, taxonomic rank (which some authors prefer to call nomenclatural rank because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a ''taxon'') in a hierarchy that reflects evolutionary relationships. Thus, the most inclusive clades (such as Eukarya and Animalia) have the highest ranks, whereas the least inclusive ones (such as ''Homo sapiens'' or '' Bufo bufo'') have the lowest ranks. Ranks can be either relative and be denoted by an indented taxonomy in which the level of indentation reflects the rank, or absolute, in which various terms, such as species, genus, family, order, class, phylum, kingdom, and domain designate rank. This page emphasizes absolute ranks and the rank-based codes (the Zoological Code, the Botanical Code, the Code for Cultivated Plants, the Prokaryotic Code, and thCode for Viruses require them. However, absolute ranks are not r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seguenzioidea
Seguenzioidea is a family (biology), superfamily of sea snails, marine (ocean), marine gastropod mollusks in the clade Vetigastropoda.Gofas, S. (2010). Seguenzioidea. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224565 on 2011-01-09 Description The distinctive characteristics of the shells of the Seguenzioidea are: * the nacreous layer (a plesiomorphic character, i.e. a character state that a taxon is inferred to have been retained from its ancestors) This occurs also in the following families: Pleurotomariidae, Haliotidae, Turbinidae, Trochidae, and possibly in the Skeneidae. * the protoconch has a trochoid shape. * usually with one or more labral sinuses. This character is also found is several other superfamilies such as Neomphaloidea, Pleurotomarioidea, Fissurelloidea, and Scissurelloidea and in the families Siliquariidae and Turrid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reykjanes Ridge
The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world. In the North Atlantic, the ridge separates the North American from the Eurasian plate and the African plate, north and south of the Azores triple junction. In the South Atlantic, it separates the African and South American plates. The ridge extends from a junction with the Gakkel Ridge (Mid-Arctic Ridge) northeast of Greenland southward to the Bouvet triple junction in the South Atlantic. Although the Mid-Atlantic Ridge is mostly an underwater feature, portions of it have enough elevation to extend above sea level, for example in Iceland. The ridge has an average spreading rate of about per year. Discovery A ridge under the northern Atlantic Ocean was first inferred by Matthew Fontaine Maury in 1853, based on soundings by the USS ''Dolphin''. The existence of the ridge and its extensio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granigyra
''Granigyra'' is a genus of sea snails, marine gastropod mollusks, unassigned in the superfamily Seguenzioidea. Species Species within the genus ''Granigyra'' include: * '' Granigyra arenosa'' Warén, 1993 * '' Granigyra filosa'' (Dall, 1919) * '' Granigyra granulifera'' Warén, 1992 * ''Granigyra inflata ''Granigyra inflata'' is a species of sea snail in the superfamily Seguenzioidea. Description The size of the shell varies between . Distribution This species occurs in the Atlantic Ocean off Spain, Portugal, and Iceland Reykjanes Ridge. Ref ...'' (Warén, 1992) * '' Granigyra limata'' (Dall, 1889) * '' Granigyra nipponica'' (Okutani, 1964) * '' Granigyra oblatogyra'' De Souza & Pimenta, 2002 * '' Granigyra piona'' (Dall, 1919) * '' Granigyra pruinosa'' (Jeffreys, 1883) * '' Granigyra radiata'' Dall, 1927 * '' Granigyra spinulosa'' Bush, 1897 * '' Granigyra tenera'' (Jeffreys, 1883) * '' Granigyra typica'' Thiele, 1925 ;Species brought into synonymy: * ''Granigyra monte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molluscs Of The Atlantic Ocean
Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The number of additional fossil species is estimated between 60,000 and 100,000, and 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. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat, as numerous groups are freshwater and even terrestrial species. 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 extant invertebrate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
