|
Arturia Alcatraziensis
''Arturia alcatraziensis'' is a species of calcareous sponge from Brazil. It is named after the Alcatrazes Islands Alcatrazes is a Brazilian archipelago, located some 35 km south of São Sebastião, in the northern coast of the State of São Paulo, one hour away by boat, approximately. It is protected by the largest marine integral conservation unit of ... where it was discovered. References alcatraziensis Animals described in 2007 Fauna of Brazil {{calcarea-stub ... [...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] |
Calcareous Sponge
The calcareous sponges of class Calcarea are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made of calcium carbonate in the form of calcite or aragonite. While the spicules in most species have three points, in some species they have either two or four points. Biology All sponges in this class are strictly marine, and, while they are distributed worldwide, most are found in shallow tropical waters. Like nearly all other sponges, they are sedentary filter feeders. All three sponge body plans are represented within class Calcarea : asconoid, syconoid, and leuconoid. Typically, calcareous sponges are small, measuring less than in height, and drab in colour. However, a few brightly coloured species are also known. Calcareous sponges vary from radially symmetrical vase-shaped body types to colonies made up of a meshwork of thin tubes, or irregular massive forms. The skeleton has either a mesh or honeycomb structure. Classifica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcatrazes Islands
Alcatrazes is a Brazilian archipelago, located some 35 km south of São Sebastião, in the northern coast of the State of São Paulo, one hour away by boat, approximately. It is protected by the largest marine integral conservation unit of Brazil after the Abrolhos Marine National Park. Etymology The name of the archipelago comes from a bird which forms its second largest bird population, with some three thousand specimens: the brown bobby, which is also known as "alcatraz", a word that in Arabic means "the diver", due to its ability to dive into the sea to capture fishes or squids. Geography Geology The islands are believed to present their very current format since at least 2.5 million years ago. However, during the last glacial period (in between 85 thousand and 15 thousand years ago), the sea water was receded in such a way that the archipelago was actually a mountain still connected to the continent. Alcatrazes is formed by five main islands. The biggest one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arturia (sponge)
''Arturia'' is a genus of calcareous sponge in the family Clathrinidae which contains 14 species. It is named after Arthur Dendy, a prominent researcher of calcareous sponges. It was renamed ''Arturia'' in 2017 because the name ''Arthuria'' was already assigned to a genus of molluscs. Description and biology Calcinea in which the cormus comprised a typical clathroid body. A stalk may be present. The skeleton contains regular (equiangular and equiradiate) triactines and tetractines. However, tetractines are more rare. Diactines may be added. Asconoid aquiferous system. ''Arturia canariensis'', for example, is a filter feeder, sieving plankton and other organic material out of the current of water as it passes through the ostia. Both asexual reproduction by budding and sexual reproduction take place in ''Arturia canariensis''. As in other species, each sponge is a hermaphrodite. Sperm is liberated into the sea and some is drawn into other sponges with the water current that passes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animals Described In 2007
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilateral symmetry, bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
