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Chondrocladia
''Chondrocladia'' is a genus of carnivorous demosponges of the family Cladorhizidae. '' Neocladia'' was long considered a junior synonym, but has recently become accepted as a distinct genus. 33 named species are placed in this genus at present, but at least two additional undescribed ones are known to exist, while some of the described ones are known only from a few specimens or (e.g. the enigmatic '' Chondrocladia occulta'') just a single one, and their validity and/or placement in ''Chondrocladia'' is doubtful. ''Chondrocladia'' sponges are stipitate, with a stalk frequently anchored in the substrate by rhizoids and an egg-shaped body, sometimes with branches that end in inflatable spheres. Fossils assignable to this genus are known since the Pleistocene, less than 2 million years ago. But given its deep sea habitat, ''Chondrocladia'' may well have been around for much longer – perhaps since the Mesozoic, as characteristic spicules (termed "microcricorhabds" or "trochi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocladia Lampadiglobus
''Chondrocladia'' is a genus of carnivorous demosponges of the family Cladorhizidae. '' Neocladia'' was long considered a junior synonym, but has recently become accepted as a distinct genus. 33 named species are placed in this genus at present, but at least two additional undescribed ones are known to exist, while some of the described ones are known only from a few specimens or (e.g. the enigmatic '' Chondrocladia occulta'') just a single one, and their validity and/or placement in ''Chondrocladia'' is doubtful. ''Chondrocladia'' sponges are stipitate, with a stalk frequently anchored in the substrate by rhizoids and an egg-shaped body, sometimes with branches that end in inflatable spheres. Fossils assignable to this genus are known since the Pleistocene, less than 2 million years ago. But given its deep sea habitat, ''Chondrocladia'' may well have been around for much longer – perhaps since the Mesozoic, as characteristic spicules (termed "microcricorhabds" or "trochi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocladia Occulta
''Chondrocladia'' is a genus of carnivorous demosponges of the family Cladorhizidae. '' Neocladia'' was long considered a junior synonym, but has recently become accepted as a distinct genus. 33 named species are placed in this genus at present, but at least two additional undescribed ones are known to exist, while some of the described ones are known only from a few specimens or (e.g. the enigmatic '' Chondrocladia occulta'') just a single one, and their validity and/or placement in ''Chondrocladia'' is doubtful. ''Chondrocladia'' sponges are stipitate, with a stalk frequently anchored in the substrate by rhizoids and an egg-shaped body, sometimes with branches that end in inflatable spheres. Fossils assignable to this genus are known since the Pleistocene, less than 2 million years ago. But given its deep sea habitat, ''Chondrocladia'' may well have been around for much longer – perhaps since the Mesozoic, as characteristic spicules (termed "microcricorhabds" or "trochi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocladia Albatrossi
''Chondrocladia'' is a genus of carnivorous demosponges of the family Cladorhizidae. '' Neocladia'' was long considered a junior synonym, but has recently become accepted as a distinct genus. 33 named species are placed in this genus at present, but at least two additional undescribed ones are known to exist, while some of the described ones are known only from a few specimens or (e.g. the enigmatic ''Chondrocladia occulta'') just a single one, and their validity and/or placement in ''Chondrocladia'' is doubtful. ''Chondrocladia'' sponges are stipitate, with a stalk frequently anchored in the substrate by rhizoids and an egg-shaped body, sometimes with branches that end in inflatable spheres. Fossils assignable to this genus are known since the Pleistocene, less than 2 million years ago. But given its deep sea habitat, ''Chondrocladia'' may well have been around for much longer – perhaps since the Mesozoic, as characteristic spicules (termed "microcricorhabds" or "trochir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demospongiae
Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include 76.2% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). They are sponges with a soft body that covers a hard, often massive skeleton made of calcium carbonate, either aragonite or calcite. They are predominantly leuconoid in structure. Their "skeletons" are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. Where spicules of silica are present, they have a different shape from those in the otherwise similar glass sponges. Some species, in particular from the Antarctic, obtain the silica for spicule building from the ingestion of siliceous diatoms. The many diverse orders in this class include all of the large sponges. Most are marine dwellers, but one order (Spongillida) live in freshwater environments. Some species are brightly colored, with great variety in body shape; the largest species are over ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladorhizidae
Cladorhizidae is a family of demosponges which are carnivorous and prey on crustaceans and other small animals. They are deep sea sponges typically found on oceanic ridges and seamount systems. As of 2017, nine new species have been discovered in the Southwest Indian Ocean Ridge (SWIOR) including: ''Abyssocladia boletiphora'', ''Ab. corniculiphora'', ''Ab. hemiradiata'', ''Asbestopluma (Asbestopluma) unguiferata'', ''As. (A.) jamescooki'', ''As. (A.) laminachela'', ''As. (A.) pseudoisochela'', ''As. (A.) ramuscula'' and ''Chondrocladia (Meliiderma) rogersi.'' These discoveries have proven to show that this family of unique sponges is much more diverse than originally known. Genera The World Register of Marine Species includes the following genera: *''Abyssocladia'' Lévi, 1964 *'' Abyssosdiskos'' Ekins, Erpenbeck, Goudie & Hooper, 2020 *''Asbestopluma'' Topsent, 1901 *''Axoniderma'' Ridley & Dendy, 1886 *'' Bathytentacular'' Ekins, Erpenbeck, Goudie & Hooper, 2020 [...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] |
Early Jurassic
The Early Jurassic Epoch (geology), Epoch (in chronostratigraphy corresponding to the Lower Jurassic series (stratigraphy), Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic-Jurassic extinction event, 201.3 Ma (million years ago), and ends at the start of the Middle Jurassic 174.1 Ma. Certain rocks of marine origin of this age in Europe are called "Lias Group, Lias" and that name was used for the period, as well, in 19th-century geology. In southern Germany rocks of this age are called Black Jurassic. Origin of the name Lias There are two possible origins for the name Lias: the first reason is it was taken by a geologist from an England, English quarryman's dialect pronunciation of the word "layers"; secondly, sloops from north Cornwall, Cornish ports such as Bude would sail across the Bristol Channel to the Vale of Glamorgan to load up with rock from coastal limestone quarries (lias limestone from S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choanocyte
Choanocytes (also known as "collar cells") are cells that line the interior of asconoid, syconoid and leuconoid body types of sponges that contain a central flagellum, or ''cilium,'' surrounded by a collar of microvilli which are connected by a thin membrane. They make up the choanoderm, a type of cell layer found in sponges. The cell has the closest resemblance to the choanoflagellates which are the closest related single celled protists to the animal kingdom (metazoans). The flagellae beat regularly, creating a water flow across the microvilli which can then filter nutrients from the water taken from the collar of the sponge. Food particles are then phagocytosed by the cell. Anderson, D. (2001) ''Invertebrate Zoology'' Oxford University Press Location Choanocytes are found dotting the surface of the spongocoel in asconoid sponges and the radial canals in syconoid sponges, but they comprise entirely the chambers in leuconoid sponges. Function By cooperatively moving their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicole Boury-Esnault
Nicole Boury-Esnault is a retired French researcher of sponges, formerly at Centre d'Océanologie de Marseille, Aix-Marseille University. Research In 1995, Nicole Boury-Esnault and Jean Vacelet discovered a species of carnivorous sponges of the genus ''Asbestopluma'', during an exploration of a shallow cave in the Mediterranean. Caves can recapitulate the environment of the deep sea-bed due to the darkness and lack of nutrient, permitting the study of deep-sea-like regions in shallow areas of water. Carnivorous sponges, lacking the normal filter feeding apparatus, had been previously discovered during deep-sea trawls and presumed to be damaged since they did not have a known feeding mechanism. The discovery of members of the family in shallow water meant that they could be experimentally tested, which is when Boury-Esnault and Vacelet observed feeding on small crustaceans. Later they also reported on a member of the genus which used both carnivory and methanotrophy to survive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Vacelet
Jean Vacelet is a French marine biologist who specialises in the underwater fauna of the Mediterranean. After earning his licence at the Faculté des Sciences de Marseille and learning to dive in 1954, he specialised in the study of sponges at the Marine station of Endoume, and there he has stayed faithful to both sponges and place for more than half a century. His research has included all aspects of sponges: taxonomy, habitat, biology, anatomy, their bacterial associations, and their place in the evolution of multi-celled animals. He has studied them not only in the Mediterranean but in the Indian Ocean and the Pacific. Exploration of underwater grottoes, together with Jacques Laborel and Jo Hamelin, revealed the existence of sponges dating from very ancient geological periods and the unexpected existence of carnivorous sponges, and surprisingly, the grottoes in some ways mimicked life at much greater depths. He earned one doctorate in 1958 and his doctorat ès-sciences, unde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pacific and Indian Oceans. Its Metropolitan France, metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea; overseas territories include French Guiana in South America, Saint Pierre and Miquelon in the North Atlantic, the French West Indies, and many islands in Oceania and the Indian Ocean. Due to its several coastal territories, France has the largest exclusive economic zone in the world. France borders Belgium, Luxembourg, Germany, Switzerland, Monaco, Italy, Andorra, and Spain in continental Europe, as well as the Kingdom of the Netherlands, Netherlands, Suriname, and Brazil in the Americas via its overseas territories in French Guiana and Saint Martin (island), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Ciotat
La Ciotat (; oc, label= Provençal Occitan, La Ciutat ; in Mistralian spelling ''La Ciéutat''; 'the City') is a commune in the Bouches-du-Rhône department in the Provence-Alpes-Côte d'Azur region in Southern France. It is the southeasternmost commune of the Aix-Marseille-Provence Metropolis. La Ciotat is located at about 25 km (15.5 mi) to the east of Marseille, at an equal distance from Toulon. In 2018, it had a population of 35,281. History The name ''La Ciutat'', meaning 'the City' in Occitan ( Provençal) and Catalan, became prominent in the 15th century. La Ciotat was the setting of one of the first projected motion pictures, ''L'Arrivée d'un train en gare de La Ciotat'' filmed by the Lumière brothers in 1895. According to the Institut Lumière, before its Paris premiere, the film was shown to invited audiences in several French cities, including La Ciotat. Another three of the earliest Lumière films, ''Partie de cartes'', ''L'Arroseur arrosé'' (the fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
