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Radianthus Malu
''Radianthus malu'', also known as the malu anemone, delicate sea anemone or white sand anemone, is a species of sea anemone in the family Stichodactylidae. Description This anemone has stout, sparse tentacles, almost always under 40mm in length, usually tipped with magenta colouration. These tentacles vary in length, even among a single radial row. The column has a pale cream or yellow colouration, with patches of deep yellow or orange sometimes present. It remains buried in sediment up to the level of the oral disc. The oral disc grows to a maximum diameter of 200 mm, is brown or purplish, possibly with a white, radial pattern. It may sometimes be bright green, but this is rare. This species is similar in appearance to '' Radianthus doreensis'', '' Heteractis aurora'', and '' Radianthus crispa''. These species are also found burrowed into the sediment, and share the same red or yellow blotches. ''R. malu'' is primarily distinguished by its short sparse tentacles. Dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Cort Haddon
Alfred Cort Haddon, Sc.D., FRS, FRGS FRAI (24 May 1855 – 20 April 1940) was an influential British anthropologist and ethnologist. Initially a biologist, who achieved his most notable fieldwork, with W. H. R. Rivers, Charles Gabriel Seligman and Sidney Ray on the Torres Strait Islands. He returned to Christ's College, Cambridge, where he had been an undergraduate, and effectively founded the School of Anthropology. Haddon was a major influence on the work of the American ethnologist Caroline Furness Jayne. In 2011, Haddon's 1898 ''The Recordings of the Cambridge Anthropological Expedition to Torres Straits'' were added to the National Film and Sound Archive of Australia's Sounds of Australia registry. The original recordings are housed at the British Library and many have been made available online. Early life Alfred Cort Haddon was born on 24 May 1855, near London, the elder son of John Haddon, the head of John Haddon & Co, a firm of printers and typefounders establish ... [...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 Anemone
Sea anemones ( ) are a group of predation, predatory marine invertebrates constituting the order (biology), order Actiniaria. Because of their colourful appearance, they are named after the ''Anemone'', a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and ''hydra (genus), Hydra''. Unlike jellyfish, sea anemones do not have a Jellyfish#Life history and behavior, medusa stage in their life cycle. A typical sea anemone is a single polyp (zoology), polyp attached to a hard surface by its base, but some species live in soft sediment, and a few float near the surface of the water. The polyp has a columnar trunk topped by an oral disc with a ring of tentacles and a central mouth. The tentacles can be retracted inside the body cavity or expanded to catch passing prey. They are armed with cnidocytes (stinging cells). In many specie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) 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". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stichodactylidae
Stichodactylidae is a family of sea anemones that contains the genera '' Stichodactyla'' (carpet anemones) and '' Radianthus''. These species reside exclusively within the shallow waters of the tropical Indo-Pacific area and are in the main family of sea anemones that hosts several varieties of clownfishes. Most species of sea anemones are harmless to humans, but at least some species of the genus ''Stichodactyla'' are highly venomous and their sting may cause anaphylactic shock and organ failure (notably acute liver failure). In contrast, the venom of ''Radianthus'' spp. has shown potential in the treatment of lung cancer. Discovery C. Collingwood first reported species of the genus ''Stichodactylidae'' in 1868 after taking note of the existence of gigantic sea-anemones in the China Sea, containing quasi-parasitic fish. Genera and species The following species are recognized within the family Stichodactylidae: *Genus '' Radianthus'' Kwietniewski, 1896 **'' Radianthus crispa'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radianthus Doreensis
''Radianthus doreensis'', also known as long tentacle anemone and corkscrew tentacle sea anemone, is a species of sea anemone in the family (biology), family Stichodactylidae. Description ''Radianthus doreensis'' has relatively few tentacles. They are all similar to one another in size and colour, being purplish-gray to brown. Each grows to about 1.75 inches, are sinuous, and each taper evenly toward the tip. In some cases they have a corkscrew shape. The oral disc is normally purplish-gray to brown, and sometimes has a green cast. It has a flared shape, and grows to a maximum of 5 cm wide, but is often far smaller. It has white lines that are oriented radially, sometimes extending onto the tentacles. This species remains at the surface of the sediment, with the column buried. The lower portion of the column is a dull orange to bright red colour, with the upper portion being brownish, containing a round to ovoid verrucae in rows oriented longitudinally. Distribution ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
