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Dirona
''Dirona'' is a genus of sea slugs, Pacific Ocean nudibranchs, marine, opisthobranch gastropod mollusks in the family Dironidae.MolluscaBase eds. (2021). MolluscaBase''Dirona'' MacFarland, 1905.Accessed through: World Register of Marine Species on 2021-01-18. ''Dirona'' is the type genus of the family Dironidae. This genus is characterized by large, broad cerata. Distribution These nudibranchs live on the West Coast of North America and Central America, some extending west into Japanese and Russian waters. Habitat Dironids live in various habitats, including the intertidal zone of rocky shores, bays and estuaries. Life habits Most species in this genus eat various species of bryozoans. Some also feed on hydroids and ascidians.Behrens David W., 1980, ''Pacific Coast Nudibranchs: a guide to the opisthobranchs of the northeastern Pacific'', Sea Challenger Books, California Species Species within this genus include: * ''Dirona akkeshiensis'' Baba, 1957 *'' Dirona al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirona Akkeshiensis
''Dirona'' is a genus of sea slugs, Pacific Ocean nudibranchs, marine, opisthobranch gastropod mollusks in the family Dironidae.MolluscaBase eds. (2021). MolluscaBase''Dirona'' MacFarland, 1905.Accessed through: World Register of Marine Species on 2021-01-18. ''Dirona'' is the type genus of the family Dironidae. This genus is characterized by large, broad cerata. Distribution These nudibranchs live on the West Coast of North America and Central America, some extending west into Japanese and Russian waters. Habitat Dironids live in various habitats, including the intertidal zone of rocky shores, bays and estuaries. Life habits Most species in this genus eat various species of bryozoans. Some also feed on hydroids and ascidians.Behrens David W., 1980, ''Pacific Coast Nudibranchs: a guide to the opisthobranchs of the northeastern Pacific'', Sea Challenger Books, California Species Species within this genus include: * '' Dirona akkeshiensis'' Baba, 1957 *''Dirona albolineata' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirona Albolineata
The alabaster nudibranch, white-lined Dirona, or frosted sea slug (''Dirona albolineata'') is an Eastern Pacific Ocean opisthobranch gastropod mollusk in the family Dironidae. Distribution This species occurs in the Eastern Pacific Ocean from Alaska to San Diego, California. Description ''Dirona albolineata'' can reach a length of about . This species, like others in the genus, is translucent with large, broad and quite flat cerata. In these nudibranchs the cerata lack cnidosacs. The most common ''D. albolineata'' is translucent with opalescent white outlining the cerata and the midline of the tail, but the color varies from white through rose pink, pale orange, lavender to a rufous shade. Biology These nudibranchs are carnivores that feed on a wide variety of prey, mostly on bryozoans, on small crustaceans, hydroids, ascidians, and snails. They can be found all the year around in the shallow subtidal cold waters, at depths of 0 to 28 m. They are simultaneous hermap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirona Picta
''Dirona picta'', common name colorful dirona, is a species of sea slug, an Eastern Pacific Ocean nudibranch, a marine, opisthobranch gastropod mollusk in the family Dironidae.Bouchet, P. (2015). Dirona picta MacFarland, 1905. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=558927 on 2016-05-21 Distribution This marine species occurs from Northern Oregon, USA to Baja California Sur Baja California Sur (; 'South Lower California'), officially the Free and Sovereign State of Baja California Sur ( es, Estado Libre y Soberano de Baja California Sur), is the least populated state and the 31st admitted state of the 32 federal ent ..., Mexico. Also reported from Japan. References * Farmer, W. M. & C. L. Collier. 1963. Notes on the Opisthobranchia of Baja California, Mexico, with range extensions. ''The Veliger, 6(2)'': 62-63. * Goddard, J.H.R. 1987. Observations on the opisthobranch mollusks of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirona Pellucida
''Dirona pellucida'' is a species of sea slug, a northern Pacific Ocean nudibranch, a marine, opisthobranch gastropod mollusk in the family Dironidae. This species feeds on the bryozoan species '' Bugula pacifica''. Distribution This nudibranch occurs from Oregon to Alaska, and across the Bering Sea south to Japan and Korea Description This species, like others in the genus, is translucent with large, broad cerata :''The tortrix moth genus ''Cerata'' is considered a junior synonym of ''Cydia. Cerata, singular ceras, are anatomical structures found externally in nudibranch sea slugs, especially in aeolid nudibranchs, marine opisthobranch gastropod mollus .... The color is various shades of orange, with a white line on the edge of all of the cerata. References * SeaslugForum info at* Slugsite info at Further reading * Behrens David W., 1980, ''Pacific Coast Nudibranchs: a guide to the opisthobranchs of the northeastern Pacific'', Sea Challenger Books, California Dir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dironidae
Dironidae is a family of nudibranchs, marine gastropod mollusc 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 esti ...s, in the clade Euthyneura. There are no subfamilies in Dironidae. Genera * '' Dirona'' MacFarland, in Cockerell & Eliot, 1905 - type genusGoddard, J.H.R., 2000 (June 16''Dirona albolineata'' MacFarland in Cockerell & Eliot, 1905. nSea Slug Forum. Australian Museum, Sydney. References {{Taxonbar, from=Q5280914 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank Mace MacFarland
Frank Mace MacFarland (1869–1951) was an American malacologist associated with Stanford University in California. Born in Centralia, Illinois, MacFarland attended DePauw University (A.B. 1889), Stanford University (A.M., 1893) and the University of Wurzburg (PhD, 1896). On August 27, 1902, MacFarland married Olive Knowles Hornbrook (b.30 June 1872, West Virginia; B.L. 1893, Ohio Wesleyan University; A.B. 1908, Stanford; d. 1 May 1962, San Mateo, California). Mrs. MacFarland was a skilled technician and artist whose delicate watercolor paintings illustrated many of his scientific publications. Frank MacFarland was an authority on the life and habits of nudibranchs and he left unfinished a comprehensive monograph on the group which was published posthumously in 1966. He played a leading role in organizing the Hopkins Seaside Laboratory (now Hopkins Marine Station) in Pacific Grove, California, of which he was in charge from 1910 to 1913 and co-director from 1915 to 1917, and in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Slug
Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are gastropods, i.e. they are sea snails (marine gastropod mollusks) that over evolutionary time have either completely lost their shells, or have seemingly lost their shells due to having a greatly reduced or internal shell. The name "sea slug" is most often applied to nudibranchs, as well as to a paraphyletic set of other marine gastropods without obvious shells. Sea slugs have an enormous variation in body shape, color, and size. Most are partially translucent. The often bright colors of reef-dwelling species implies that these animals are under constant threat of predators, but the color can serve as a warning to other animals of the sea slug's toxic stinging cells ( nematocysts) or offensive taste. Like all gastropods, they have small, razor-sharp teeth, called radulas. Most sea slugs have a pair of rhinophores—sens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical manifestation of its ecological niche. Thus "habitat" is a species-specific term, fundamentally different from concepts such as environment or vegetation assemblages, for which the term "habitat-type" is more appropriate. The physical factors may include (for example): soil, moisture, range of temperature, and light intensity. Biotic factors will include the availability of food and the presence or absence of predators. Every species has particular habitat requirements, with habitat generalist species able to thrive in a wide array of environmental conditions while habitat specialist species requiring a very limited set of factors to survive. The habitat of a species is not necessarily found in a geographical area, it can be the interior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascidians
Ascidiacea, commonly known as the ascidians, tunicates (in part), and sea squirts (in part), is a polyphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. Ascidians are characterized by a tough outer "tunic" made of a polysaccharide. Ascidians are found all over the world, usually in shallow water with salinities over 2.5%. While members of the Thaliacea and Larvacea (Appendicularia) swim freely like plankton, sea squirts are sessile animals after their larval phase: they then remain firmly attached to their substratum, such as rocks and shells. There are 2,300 species of ascidians and three main types: solitary ascidians, social ascidians that form clumped communities by attaching at their bases, and compound ascidians that consist of many small individuals (each individual is called a zooid) forming colonies up to several meters in diameter. Sea squirts feed by taking in water through a tube, the oral siphon. The water enters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroids
Hydroids are a life stage for most animals of the class Hydrozoa, small predators related to jellyfish. Some hydroids such as the freshwater ''Hydra'' are solitary, with the polyp attached directly to the substrate. When these produce buds, they become detached and grow on as new individuals. The majority of hydroids are colonial. The original polyp is anchored to a solid substrate and forms a bud which remains attached to its parent. This in turn buds and in this way a stem is formed. The arrangement of polyps and the branching of the stem is characteristic of the species. Some species have the polyps budding directly off the stolon which roots the colony. The polyps are connected by epidermis which surrounds a gastrovascular cavity. The epidermis secretes a chitinous skeleton which supports the stem and in some hydroids, the skeleton extends into a cup shape surrounding the polyp. Most of the polyps are gastrozooids or feeding polyps, but some are specialised reproducti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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