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Megatrema Anglicum
''Adna'' is a genus of acorn barnacles that grows in association with or semi-parasitically on corals and octocorals. Its only species is ''Adna anglica''. It is found in the intertidal zone on the coasts of northwestern Europe and in the Mediterranean Sea. Description ''Adna anglicum'' has a pink conical shell on a cup-shaped base and can grow to a diameter of up to . There are longitudinal striations on the shell and the operculum, the lid to the opening through which the barnacle's feeding parts protrude, is depressed, so that the structure is vase-shaped. Another barnacle, '' Verruca stroemia'', is sometimes found at the foot of the coral's calcified cup, but ''M. anglicum'' seems to be the only barnacle species adapted to live in close proximity to the coral's tentacles. Ecology In British waters, where it is at the northern limit of its range, ''Adna anglicum'' is found in association with the solitary cup coral ''Caryophyllia smithii'', and in the Mediterranean it is of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), 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 taxonomy (biology), 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caryophyllia Smithii Stokes & Broderip, 1828
''Caryophyllia'' is a genus of solitary corals in the family Caryophylliidae. Members of this genus are azooxanthellate (do not contain symbiotic algae) and are found in the North Atlantic Ocean and the Mediterranean Sea at depths down to . Subgenera The genus has two subgenera and the following species according to the World Register of Marine Species:- * Subgenus ''Acanthocyathus'' Milne Edwards & Haime, 1848 ** '' Caryophyllia decamera'' Cairns, 1998 ** '' Caryophyllia dentata'' (Moseley, 1881) ** '' Caryophyllia grayi'' (Milne Edwards & Haime, 1848) ** '' Caryophyllia karubarica'' Cairns & Zibrowius, 1997 ** '' Caryophyllia quangdongensis'' Zou, 1984 ** '' Caryophyllia spinicarens'' (Moseley, 1881) ** '' Caryophyllia spinigera'' ( Saville-Kent, 1871) ** '' Caryophyllia unicristata'' Cairns & Zibrowius, 1997 ** '' Caryophyllia zanzibarensis'' Zou, 1984 * Subgenus ''Caryophyllia'' Lamarck, 1801 ** '' Caryophyllia abrupta'' Cairns, 1999 ** '' Caryophyllia abyssorum'' Duncan, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitism
Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted structurally to this way of life. The entomologist E. O. Wilson has characterised parasites as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as Armillaria mellea, honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the Orobanchaceae, broomrapes. There are six major parasitic Behavioral ecology#Evolutionarily stable strategy, strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), wikt:trophic, trophicallytransmitted parasitism (by being eaten), Disease vector, vector-transmitted paras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epithelium
Epithelium or epithelial tissue is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. It is a thin, continuous, protective layer of compactly packed cells with a little intercellular matrix. Epithelial tissues line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs. An example is the epidermis, the outermost layer of the skin. There are three principal shapes of epithelial cell: squamous (scaly), columnar, and cuboidal. These can be arranged in a singular layer of cells as simple epithelium, either squamous, columnar, or cuboidal, or in layers of two or more cells deep as stratified (layered), or ''compound'', either squamous, columnar or cuboidal. In some tissues, a layer of columnar cells may appear to be stratified due to the placement of the nuclei. This sort of tissue is called pseudostratified. All glands are made up of epithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cnidocyte
A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one large secretory organelle called a cnidocyst (also known as a cnida () or nematocyst) that can deliver a sting to other organisms. The presence of this cell defines the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). Cnidae are used to capture prey and as a defense against predators. A cnidocyte fires a structure that contains a toxin within the cnidocyst; this is responsible for the stings delivered by a cnidarian. Structure and function Each cnidocyte contains an organelle called a cnida, cnidocyst, nematocyst, ptychocyst or spirocyst. This organelle consists of a bulb-shaped capsule containing a coiled hollow tubule structure attached to it. An immature cnidocyte is referred to as a cnidoblast or nematoblast. The externally oriented side of the cell has a hair-like trigger called a cnidocil, which is a mechano- and chemo-receptor. When the trigger is activated, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnacle
A barnacle is a type of arthropod constituting the subclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive settings. They are sessile (nonmobile) and most are suspension feeders, but those in infraclass Rhizocephala are highly specialized parasites on crustaceans. They have four nektonic (active swimming) larval stages. Around 1,000 barnacle species are currently known. The name is Latin, meaning "curl-footed". The study of barnacles is called cirripedology. Description Barnacles are encrusters, attaching themselves temporarily to a hard substrate or a symbiont such as a whale ( whale barnacles), a sea snake ('' Platylepas ophiophila''), or another crustacean, like a crab or a lobster (Rhizocephala). The most common among them, "acorn barnacles" ( Sessilia), are sessile where they grow their shells directly onto the substrate. Peduncul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), 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 taxonomy (biology), 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptopsammia Pruvoti
''Leptopsammia pruvoti'', the sunset cup coral, is a solitary stony coral in the family Dendrophylliidae. It is an azooxanthellate species, meaning its tissues do not contain the symbiotic unicellular algae (zooxanthellae) of the genus ''Symbiodinium'', as do most corals. It is native to the Mediterranean Sea. The species was described by Henri de Lacaze-Duthiers in 1897 and named to honor the French marine biologist Georges Pruvot. Description ''Leptopsammia pruvoti'' is a solitary stony coral and superficially resembles a sea anemone. The polyp sits in a calcareous cup, wider at the base than the top, which varies in shape from cylindrical and short to conical and long. It grows to a height of about and a diameter of . The polyp is yellow or orange with about ninety-six long, translucent yellow tentacles. It can retract back into the skeletal cup, so that the tentacles become barely visible. This species can be confused with another yellow or orange cup coral, ''Balanophylli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caryophyllia Smithii
''Caryophyllia smithii'', the Devonshire cup coral, is a species of solitary coral in the family Caryophylliidae. It is native to the northeastern Atlantic Ocean, the North Sea and the Mediterranean Sea. There are shallow and deep-water forms which are structurally different. It forms part of a biodiverse community of rock encrusting organisms and is often parasitised by a barnacle. Description ''Caryophyllia smithii'' is a solitary species of coral with a cup-shaped corallum (stony skeleton) with an elliptical base and a diameter of up to . It is usually broader than it is high. The septa (vertical radial calcareous plates) are arranged in four to five cycles and have smooth edges. The column of the polyp can project by up to from the cup and there are about eighty tentacles each with a terminal knob. The polyp is translucent and the colour is variable and may be white, pink, orange, red, brown or bright green. Sometimes there are contrasting regions of colour, especially form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Marine Life Information Network
The Marine Life Information Network (MarLIN) is an information system for marine biodiversity for Great Britain and Ireland. MarLIN was established in 1998 by the Marine Biological Association together with the environmental protection agencies and academic institutions in Britain and Ireland. The MarLIN data access programme has now become the DASSH Marine Data Archive Cantre. DASSH is built on the existing extensive data and dissemination skills of the Marine Life Information Network (MarLIN), the library and information services of the National Marine Biological Library National may refer to: Common uses * Nation or country ** Nationality – a ''national'' is a person who is subject to a nation, regardless of whether the person has full rights as a citizen Places in the United States * National, Maryland, ce ... (NMBL) and the MBA's historical role in marine science. References {{ocean-stub Biology organisations based in the United Kingdom Information systems Info ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sessilia
Sessilia is an unranked clade of barnacles, comprising the barnacles without stalks, or acorn barnacles. They form a monophyletic group and are probably derived from stalked or goose barnacles. Sessilia is divided into two orders. The Verrucomorpha contain two families, Verrucidae and Neoverrucidae Neoverrucidae is a family of crustaceans belonging to the order Scalpellomorpha Scalpellomorpha is an order of acorn barnacles in the class Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 des ..., and the remaining 14 families are in the order Balanomorpha. References External links * Barnacles Crustacean orders {{maxillopoda-stub da:Rur de:Seepocken pl:Pąkle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verruca Stroemia
''Verruca stroemia'', the wart barnacle, is a species of asymmetrical sessile barnacle in the family Verrucidae Verrucidae is a family of asymmetrical sessile barnacles in the order Verrucomorpha. There are about 14 genera and more than 90 described species in Verrucidae. Genera These genera belong to the family Verrucidae: * '' Altiverruca'' Pilsbry, 19 .... References External links * Sessilia {{crustacean-stub Crustaceans described in 1776 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
