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Tochuina Nigritigris
''Tochuina nigritigris'' is a species of dendronotid nudibranch, in the family Tritoniidae,MolluscaBase eds. (2020)MolluscaBase. Tochuina nigritigris (Valdés, Lundsten & Wilson, 2018).Accessed on 2021-01-06. that is 82 mm long. Description Scientists named the species ''nigritigris'', a combination of the words "black" and "tiger" in Latin, because of its dark and light stripes. The body of the nudibranch is elongated and narrow, surrounded by numerous, densely packed glandular projections that makes them look ruffled. ''Tochuina nigritigris'' has short and white rhinophores with 9 simple lamellae, located on the anterior end of the notum. The genital and anal openings are on the right side of the body. Distribution ''Tochuina nigritigris'' was discovered by the MBARI on Guide Seamount, an underwater mountain off the coast of Central California, where it was found crawling on volcanic rocks 1,730 meters below the surface, near some dead clumps of coral. Other animals ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendronotida
Dendronotoidea is a taxonomic superfamily of small colorful sea slugs or nudibranchs, aeolid nudibranchs. MolluscaBase eds. (2022). MolluscaBase. Dendronotoidea Allman, 1845. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=182 on 2022-12-03 Families Families placed in this superfamily are as follows. * Bornellidae Bergh, 1874 * Dendronotidae Allman, 1845 * Dotidae Gray, 1853 * Hancockiidae MacFarland, 1923 * Lomanotidae Bergh, 1890 * Phylliroidae Menke, 1830 * Scyllaeidae Alder & Hancock, 1855 * Tethydidae Tethydidae is a family of dendronotid nudibranch gastropod mollusks in the superfamily Tritonioidea.Picton, B.; Bouchet, P. (2017). Tethydidae Rafinesque, 1815. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http ... Rafinesque, 1815 References External links Odhner N. H. (1934). The Nudibranchiata of British Antarctic Expedition. British Antarctic ("Terra Nova") Expedition, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Rock
Volcanic rock (often shortened to volcanics in scientific contexts) is a rock formed from lava erupted from a volcano. In other words, it differs from other igneous rock by being of volcanic origin. Like all rock types, the concept of volcanic rock is artificial, and in nature volcanic rocks grade into hypabyssal and metamorphic rocks and constitute an important element of some sediments and sedimentary rocks. For these reasons, in geology, volcanics and shallow hypabyssal rocks are not always treated as distinct. In the context of Precambrian shield geology, the term "volcanic" is often applied to what are strictly metavolcanic rocks. Volcanic rocks and sediment that form from magma erupted into the air are called "volcaniclastics," and these are technically sedimentary rocks. Volcanic rocks are among the most common rock types on Earth's surface, particularly in the oceans. On land, they are very common at plate boundaries and in flood basalt provinces. It has been est ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tritoniella Belli
''Tritoniella belli'' is a species of the nudibranch Nudibranchs () are a group of soft-bodied marine gastropod molluscs which shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have been given colourful nicknames to mat ... genus ''Tritoniella''. The species was described together with its synonym ''Tritoniella sinuata'' in 1907 by the British diplomat and malacologist Charles Eliot (diplomat), Charles Eliot. It is found in the Southern Ocean along the coast of Antarctica and along the southern parts of the Scotia Arc in depths between and . Synonymy ''Tritoniella sinuata'' was synonymized by Wägele in 1989 after she found that differentiation by the characters Charles Eliot (diplomat), Eliot described was impossible. She argued, that differences between specimens were caused by fixation and individual variability. References Gastropods described in 1907 Tritoniidae {{Tritoniidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macrouridae
Macrouridae is a family of deep sea fish, a diverse and ecologically important group, which are part of the order of cod-like fish, the Gadiformes. The species in the Macrouridae are characterised by their large heads which normally have a single barbel on the chin, projecting snouts, and slender bodies that taper to whip-like tails, without an obvious caudal fin but what there is of the caudal fin is often confluent with the posterior dorsal and anal fins. There are normally two dorsal fins, the anterior dorsal fin is quite high, the posterior quite low but is longer and takes up a greater proportion of the fish's of the back, species in the subfamily Macrouroidinae have a single dorsal fin. The long anal fin is almost as long as the second dorsal fin is nearly as long as the posterior dorsal, and sometimes it is longer. The pelvic fin is inserted in the vicinity of the thorax and normally has 5-17 fin rays but are absent in '' Macrouroides''. The body is covered in small scal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farrea
''Farrea'' is a genus of glass sponges in the family Farreidae. Species Species accepted by the World Register of Marine Species: * '' Farrea aleutiana'' Reiswig & Stone, 2013 * '' Farrea ananchorata'' Reiswig & Kelly, 2011 * '' Farrea anoxyhexastera'' Reiswig & Kelly, 2011 * '' Farrea aspondyla'' Reiswig & Stone, 2013 * '' Farrea balaguerii'' de Linares, 1887 * '' Farrea beringiana'' Okada, 1932 * '' Farrea bowerbanki'' Boury-Esnault, Vacelet & Chevaldonné, 2017 * '' Farrea campossinus'' Lopes, Hajdu & Reiswig, 2011 * '' Farrea convolvulus'' Schulze, 1899 * '' Farrea cordelli'' Reiswig, 2020 * '' Farrea densa'' Carter, 1873 * '' Farrea foliascens'' Topsent, 1906 * '' Farrea hanitschi'' Ijima, 1927 * '' Farrea herdendorfi'' Duplessis & Reiswig, 2004 * '' Farrea hieroglyphica'' Tabachnick & Fromont, 2019 * '' Farrea kurilensis'' Okada, 1932 * '' Farrea laminaris'' Topsent, 1904 * '' Farrea lendenfeldi'' Ijima, 1927 * '' Farrea medusiforma'' Reiswig & Kelly, 2011 * '' Farrea mexi ... [...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 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, cockles, mussels, scallops, and numerous other 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 ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed o ... [...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 su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octocorals
Octocorallia (also known as Alcyonaria) is a class of Anthozoa comprising around 3,000 species of water-based organisms formed of colonial polyps with 8-fold symmetry. It includes the blue coral, soft corals, sea pens, and gorgonians (sea fans and sea whips) within three orders: Alcyonacea, Helioporacea, and Pennatulacea. These organisms have an internal skeleton secreted by mesoglea and polyps with eight tentacles and eight mesentaries. As with all Cnidarians these organisms have a complex life cycle including a motile phase when they are considered plankton and later characteristic sessile phase. Octocorals have existed at least since the Ordovician period, as shown by Maurits Lindström's findings in the 1970s, however recent work has shown a possible Cambrian origin. Biology Octocorals resemble the stony corals in general appearance and in the size of their polyps, but lack the distinctive stony skeleton. Also unlike the stony corals, each polyp has only eight tentacles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinoid
Crinoids are marine animals that make up the Class (biology), class Crinoidea. Crinoids that are attached to the sea bottom by a stalk in their adult form are commonly called sea lilies, while the unstalked forms are called feather stars or comatulids, which are members of the largest crinoid Order (biology), order, Comatulida. Crinoids are Echinoderm, echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. They live in both shallow water and in depths as great as . Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comatulid
Comatulida is an order of crinoids. Members of this order are known as feather stars and mostly do not have a stalk as adults. The oral surface with the mouth is facing upwards and is surrounded by five, often divided rays with feathery pinnules. Comatulids live on the seabed and on reefs in tropical and temperate waters. Taxonomy Bourgueticrinida, the sea lilies, has traditionally been viewed as an order of Articulata and a sister taxon to Comatulida. A study published in 2011 suggested that it should be renamed Bourgueticrinina and viewed as a suborder of Comatulida. Characteristics Like other echinoderms, comatulids have pentamerous symmetry (five sided) as adults though the larvae have bilateral symmetry. Late in their development, the larvae are attached to the seabed by a stalk, but this is broken at metamorphosis and the juvenile crinoid is free living. The body has an endoskeleton made from a number of articulated calcareous plates known as ossicles covered by a thin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keratoisis
''Keratoisis'' is a genus of deep-sea bamboo coral in the family Isididae Bamboo coral, family Isididae, is a family of mostly deep-sea coral of the phylum Cnidaria. It is a commonly recognized inhabitant of the deep sea, due to the clearly articulated skeletons of the species. Deep water coral species such as this ..., containing the following species: *'' Keratoisis chuni'' (Kükenthal, 1915) *'' Keratoisis flabellum'' (Nutting, 1908) *'' Keratoisis flexibilis'' (Pourtales, 1868) *'' Keratoisis glaesa'' (Grant, 1976) *'' Keratoisis gracilis'' (Thomson & Henderson, 1906) *'' Keratoisis grandiflora'' Studer, 1878 *'' Keratoisis grandis'' (Nutting, 1908) *'' Keratoisis grayi'' (Wright, 1869) *'' Keratoisis hikurangiensis'' (Grant, 1976) *'' Keratoisis japonica'' Studer, 1878 *'' Keratoisis macrospiculata'' (Kükenthal, 1915) *'' Keratoisis magnifica'' Dueñas, Alderslade & Sánchez, 2014 *'' Keratoisis microspiculata'' Molander, 1929 *'' Keratoisis palmae'' (Wright & Stude ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observation
Observation is the active acquisition of information from a primary source. In living beings, observation employs the senses. In science, observation can also involve the perception and recording of data via the use of scientific instruments. The term may also refer to any data collected during the scientific activity. Observations can be qualitative, that is, only the absence or presence of a property is noted, or quantitative if a numerical value is attached to the observed phenomenon by counting or measuring. Science The scientific method requires observations of natural phenomena to formulate and test hypotheses. It consists of the following steps: # Ask a question about a natural phenomenon # Make observations of the phenomenon # Formulate a hypothesis that tentatively answers the question # Predict logical, observable consequences of the hypothesis that have not yet been investigated # Test the hypothesis' predictions by an experiment, observational study, field stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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