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Borojevia Tetrapodifera
''Borojevia tetrapodifera'' is a species of 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 hav ... from New Zealand. The species is named after the presence of tetrapods, the only Clathrinid sponge known to possess such spicules. Description The cormus is formed of thin, regular and tightly anastomosed tubes. It is attached to the substrate by a few tubes, which are not true stalks. There are no water-collecting tubes, but vents on the surface. Cells with granules could not be found because of the state of preservation of the type specimen. The skeleton comprises equiangular and equiradiate triactines and tetractines on the tubes’ interior, and tripods and tetrapods on the exterior delimiting the cormus. The actines of the triactines and tetractines are conical, with ... [...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] |
Borojevia
''Borojevia'' is a genus of calcareous sponge in the family Clathrinidae Clathrinidae is a family of calcareous sponges in the order Clathrinida. It contains the following genera: ''Arturia'' '' Borojevia'' '' Brattegardia'' ''Clathrina'' ''Ernstia ''Ernstia'' is a genus of calcareous sponges in the family Clathr .... The genus is named after sponge researcher Radovan Borojevic. Description Calcinea in which the cormus comprises tightly anastomosed tubes. The skeleton contains regular (equiangular and equiradiate) triactines, tetractines and tripods. The apical actine of the tetractines has spines. Aquiferous system asconoid. Species * '' Borojevia aspina'' (Klautau, Solé-Cava & Borojevic, 1994) * '' Borojevia brasiliensis'' (Solé-Cava, Klautau, Boury-Esnault, Borojevic & Thorpe, 1991) * '' Borojevia cerebrum'' (Haeckel, 1872) * '' Borojevia croatica'' Klautau, Imesek, Azevedo, Plese, Nikolic & Cetkovic, 2016 * '' Borojevia crystallina'' Fontana, Cóndor-Luján, Azevedo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animals Described In 2003
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 described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have 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 bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinoderms and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
