|
Leptasterias Polaris (MNHN-IE-2013-10392)
''Leptasterias polaris'', the polar six-rayed star, is a species of starfish in the family Asteriidae. It is found in cold waters in the northwest Atlantic Ocean and in polar regions. Description ''Leptasterias polaris'' is a small, slow growing, compact starfish with six arms. The aboral (upper) surface has a covering of blunt spiny plates and is usually some shade of brown or grey. Distribution and habitat ''Leptasterias polaris'' occurs in the north west Atlantic Ocean from the Gulf of Maine northwards, and in Arctic waters. It has also been found in the Azores and European waters. Biology ''Leptasterias polaris'' is a major predator in the cold waters in which it lives. Young individuals are mostly found on rocks less than deep and feed on such bivalve molluscs as the blue mussel ('' Mytilus edulis'') and ''Hiatella arctica''. Older individuals move to deeper waters where the seabed is sand or mud and feed on clams such as the Greenland cockle (''Serripes groenlandicus'') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of 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 the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists 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. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serripes Groenlandicus
''Serripes groenlandicus'', the Greenland cockle, is a species of bivalve mollusc in the family Cardiidae. It can be found along the Atlantic coast of North America, ranging from Greenland to Cape Cod, as well as along the Pacific coast, from Alaska to Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered on ....Abbott, R.T. & Morris, P.A. ''A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies.'' New York: Houghton Mifflin, 1995. 60. References Cardiidae Bivalves described in 1789 {{bivalve-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrhoges Occidentalis
''Arrhoges occidentalis'', common name the American pelicanfoot, is a species of medium-sized sea snail, a marine gastropod mollusk in the family Aporrhaidae, the pelican's foot snails or pelican's foot shells. Morton (1956) considers ''Arrhoges occidentalis'' as the most primitive member of the family Aporrhaidae.Morton J. E. (1956). "The evolution of Perissodonta and Tylospira (Struthiolariidae)". '' Trans. R. Soc. N.Z.'' 83: 515–524. Distribution This species is distributed infralittoral, circalittoral and bathyal in the North West Atlantic Ocean and along the North American coast from Labrador and Massachusetts to off North Carolina. It lives on sand or mud at depths between 10 and 550 m. Off North Carolina it is usually found in deep water. Description The gray to yellowish-white shell is strong and has a high, pointed spire. Its length is between 4.1 and 6.4 cm (1I -2 inches). The shell has 8–10 well-rounded whorls, each of which shows many strong, curved ax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buccinum Undatum
''Buccinum undatum'', the common whelk or the waved buccinum, is a large, edible marine gastropod in the family Buccinidae, the "true whelks".Fraussen, K.; Gofas, S. (2014). Buccinum undatum Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138878 on 2015-02-18 Distribution This species is a familiar part of the marine fauna of the Northern Atlantic and is found on the shores of the United Kingdom, Ireland, France, Norway, Iceland, various other northwest European countries, some Arctic islands, and North America as far south as New Jersey. They prefer colder temperatures, and cannot survive at temperatures above 29 °C.Ten Hallers-Tjabbes, C.C., Everaarts, J.M., Mensink, B.P., & Boon, J.P. (1996) The Decline of the North Sea Whelk (''Buccinum undatum'' L.) between 1970 and 1990: A Natural or Human-induced Event? 17:1-3. pp. 333-43. ''Marine Ecology''. Habitat This species is mainly found on soft b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropoda
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ensis Directus
The Atlantic jackknife clam, ''Ensis leei'', also known as the bamboo clam, American jackknife clam or razor clam, is a large edible Marine (ocean), marine bivalve mollusc found on the North American Atlantic Ocean, Atlantic coast, from Canada to South Carolina. The species has also been Introduced species, introduced to Europe. The name "razor clam" is also used to refer to different species such as the Pacific razor clam (''Siliqua patula)'' or Razor shell (''Ensis magnus)''. Jackknife clams live in sand and mud and are found in intertidal zone, intertidal or subtidal zones in bays and estuaries. Its streamlined shell and strong foot allow Jackknife clams to burrow quickly in wet sand. Jackknife clams are also able to swim by propelling jets of water out of their shells. The Jackknife clam gets its name from their shell's extremely sharp rim and the overall shape bearing a strong resemblance to an old fashioned straight razor. Beachgoers can be injured when the shell is acciden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mya Truncata
''Mya truncata'', common name the blunt gaper or truncate softshell, is a species of edible saltwater clam, a marine bivalve mollusk in the family Myidae. Description Shells of ''Mya truncata'' can reach a size of about . These bivalves are similar to the soft-shell clams (''Mya arenaria''), but usually they are smaller. Moreover, their shells are less elongated. Valves are rounded in the anterior end and truncated in the posterior end, with a large gape allowing the passage of an extensible siphon that can reach four times the length of the shell. The siphon can be retracted completely into the shell. The two valves are triangular and convex, but the right valve is more convex than the left one. The siphon is protected by a horny sheath and it is provided with small tentacles at its end. The outer surface of the valves is covered with concentric growth lines. It is whitish, while the outermost layer of the valves ( periostracum) may be yellowish, light olive or dark brown. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spisula Polynyma
''Spisula'' is a genus of medium-sized to large marine bivalve mollusks or clams in the subfazmily Mactrinae of the family Mactridae, commonly known as surf clams or trough shells. MolluscaBase eds. (2022). MolluscaBase. Spisula Gray, 1837. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=138159 on 2022-06-20 Species Species in the genus ''Spisula'' include: * ''Spisula adamsi'' Olsson, 1961 * ''Spisula austini'' Lamprell & Whitehead, 1990 * †''Spisula bernayi'' (Cossmann, 1886) * † ''Spisula brombachensis'' S. Schneider & Mandic, 2014 * † ''Spisula couttsi'' Marwick, 1948 * † ''Spisula crassitesta'' (Finlay, 1927) * ''Spisula discors'' (Gray, 1837) * ''Spisula elliptica'' (T. Brown, 1827) * ''Spisula murchisoni'' (Reeve, 1854) * ''Spisula raveneli'' (Conrad, 1832) * ''Spisula sachalinensis'' (Schrenck, 1862) * '' Spisula solida'' ( Linnaeus, 1758) * ''Spisula solidissima'' (Dillwyn, 1817) – Atlanti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hiatella Arctica
''Hiatella arctica'', known as the wrinkled rock-borer, the arctic hiatella or the arctic saxicave, is a species of saltwater clam, a marine bivalve mollusc in the family Hiatellidae. The white shell of this mollusc is thick and more or less rectangular, but generally irregular in shape. It is up to 45 mm long. ''Hiatella arctica'' is widespread and found in all the oceans, ranging from the Arctic and Antarctic to the subtropical and tropical zones. It occurs from the low water mark to depths of down to 800 m. It lives on hard substrates, often attached with byssus, for instance in mussel beds or nestling among kelp Kelps are large brown algae seaweeds that make up the order Laminariales. There are about 30 different genera. Despite its appearance, kelp is not a plant - it is a heterokont, a completely unrelated group of organisms. Kelp grows in "underwa ... holdfasts, or hiding in rock crevices and also boring itself into soft rocks. References ''Hiatella arctic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starfish
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea. About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropical zones to frigid, polar regions. They are found from the intertidal zone down to abyssal depths, at below the surface. Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mytilus Edulis
The blue mussel (''Mytilus edulis''), also known as the common mussel, is a medium-sized edible marine (ocean), marine bivalve mollusc in the family (biology), family Mytilidae, the mussels. Blue mussels are subject to commercial use and intensive aquaculture. A species with a large range, empty shells are commonly found on beaches around the world. Systematics and distribution The ''Mytilus edulis'' complex Systematically blue mussel consists of a group of (at least) three closely related taxa of mussels, known as the ''Mytilus edulis'' complex. Collectively they occupy both coasts of the North Atlantic (including the Mediterranean) and of the North Pacific in temperate to polar waters, as well as coasts of similar nature in the Southern Hemisphere. The distribution of the component taxa has been recently modified as a result of human activity. The taxa can hybridise with each other, if present at the same locality. *''Mytilus edulis'' sensu stricto: Native to the North Atla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalvia
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estim ... that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, Cockle (bivalve), cockles, mussels, scallops, and numerous other family (biology), families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into Ctenidium (mollusc), ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
