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Conica (Hydrozoa)
Conica are a cnidarian suborder of the Leptomedusae (thecate hydroids). They make up the bulk of their order; their internal relationships are not well resolved, and most of the roughly 30 families are not yet assigned to a superfamily. They are named for the distinctive shape of their hypostome, the "tip" of the polyps' body where the mouth is located. As opposed to the smaller thecate suborder Proboscidoidea with their elongated hypostome, the Conica have a simple hypostome without a pregastric cavity and a shape that is generally round or conical. Well-known members of the Conica are the "air fern" (''Sertilaria argentea'') of the Sertulariidae which is sold dried as novelty "plants" and aquarium ornaments, and the Crystal Jelly (''Aequorea victoria'') of the Aequoreidae, a bioluminescent hydrozoan. Systematics Apart from the families assigned to the three named superfamilies, there are many Conica that are presently unassigned as to superfamily, either because thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aequorea Coerulescens
''Aequorea'' is a genus of pelagic hydrozoans in the family Aequoreidae. Species The genus contains the following species: *'' Aequorea africana'' Millard, 1966 *'' Aequorea albida'' L. Agassiz, 1862 *'' Aequorea atrikeelis'' Lin, Xu, Huang & Wang, 2009 *'' Aequorea australis'' Uchida, 1947 *'' Aequorea coerulescens'' (Brandt, 1838) *'' Aequorea conica'' Browne, 1905 *'' Aequorea cyanea'' de Blainville, 1834 *'' Aequorea floridana'' Agassiz, 1862 *'' Aequorea forskalea'' Péron & Lesueur, 1810 *''Aequorea globosa'' Eschscholtz, 1829 *'' Aequorea krampi'' Bouillon, 1984 *'' Aequorea kurangai'' Gershwin, Zeidler & Davie, 2010 *'' Aequorea macrodactyla'' Brandt, 1835 *'' Aequorea minima'' Bouillon, 1985 *''Aequorea nanhainensis'' Xu, Huang & Du, 2009 *'' Aequorea papillata'' Huang & Xu, 1994 *'' Aequorea parva'' Browne, 1905 *'' Aequorea pensilis'' Haeckel, 1879 *'' Aequorea phillipensis'' Watson, 1998 *'' Aequorea taiwanensis'' Zheng, Lin, Li, Cao, Xu & Huang, 2009 *'' Aequorea ten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cone (geometry)
A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex. A cone is formed by a set of line segments, half-lines, or lines connecting a common point, the apex, to all of the points on a base that is in a plane that does not contain the apex. Depending on the author, the base may be restricted to be a circle, any one-dimensional quadratic form in the plane, any closed one-dimensional figure, or any of the above plus all the enclosed points. If the enclosed points are included in the base, the cone is a solid object; otherwise it is a two-dimensional object in three-dimensional space. In the case of a solid object, the boundary formed by these lines or partial lines is called the ''lateral surface''; if the lateral surface is unbounded, it is a conical surface. In the case of line segments, the cone does not extend beyond the base, while in the case of hal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clathrozoellidae
Clathrozoellidae is a family of cnidarians belonging to the order Leptomedusae. The family consists of only one genus: ''Clathrozoella'' Stechow, 1921 . References Leptothecata Monogeneric cnidarian families {{Leptothecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barcinidae
Barcinidae is a family of cnidarians belonging to the order Leptomedusae. The family consists of only one genus: ''Barcino'' Gili, Bouillon, Pages, Palanques & Puig, 1999. References Leptothecata Cnidarian families {{Leptothecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incertae Sedis
' () or ''problematica'' is a term used for a taxonomic group where its broader relationships are unknown or undefined. Alternatively, such groups are frequently referred to as "enigmatic taxa". In the system of open nomenclature, uncertainty at specific taxonomic levels is indicated by ' (of uncertain family), ' (of uncertain suborder), ' (of uncertain order) and similar terms. Examples *The fossil plant '' Paradinandra suecica'' could not be assigned to any family, but was placed ''incertae sedis'' within the order Ericales when described in 2001. * The fossil '' Gluteus minimus'', described in 1975, could not be assigned to any known animal phylum. The genus is therefore ''incertae sedis'' within the kingdom Animalia. * While it was unclear to which order the New World vultures (family Cathartidae) should be assigned, they were placed in Aves ''incertae sedis''. It was later agreed to place them in a separate order, Cathartiformes. * Bocage's longbill, ''Motacilla boc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basal (evolution)
In phylogenetics, basal is the direction of the ''base'' (or root) of a rooted phylogenetic tree or cladogram. The term may be more strictly applied only to nodes adjacent to the root, or more loosely applied to nodes regarded as being close to the root. Note that extant taxa that lie on branches connecting directly to the root are not more closely related to the root than any other extant taxa. While there must always be two or more equally "basal" clades sprouting from the root of every cladogram, those clades may differ widely in taxonomic rank, species diversity, or both. If ''C'' is a basal clade within ''D'' that has the lowest rank of all basal clades within ''D'', ''C'' may be described as ''the'' basal taxon of that rank within ''D''. The concept of a ' key innovation' implies some degree of correlation between evolutionary innovation and diversification. However, such a correlation does not make a given case predicable, so ancestral characters should not be imputed to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamp Of Azerbaijan 317
Stamp or Stamps or Stamping may refer to: Official documents and related impressions * Postage stamp, used to indicate prepayment of fees for public mail * Ration stamp, indicating the right to rationed goods * Revenue stamp, used on documents to indicate payment of tax * Rubber stamp, device used to apply inked markings to objects ** Passport stamp, a rubber stamp inked impression received in one's passport upon entering or exiting a country ** National Park Passport Stamps * Food stamps, tickets used in the United States that indicate the right to benefits in the Supplemental Nutrition Assistance Program Collectibles * Trading stamp, a small paper stamp given to customers by merchants in loyalty programs that predate the modern loyalty card * Eki stamp, a free collectible rubber ink stamp found at many train stations in Japan Places * Stamp Creek, a stream in Georgia * Stamps, Arkansas People * Stamp or Apiwat Ueathavornsuk (born 1982), Thai singer-songwriter * Stamp (surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tima Formosa1
Tima may refer to: Places * Tima, Bhutan, Bhutanian town * Tima, Egypt, Egyptian city * Bayt Tima, former Palestinian village Other * Tima (name) * Tima people * Tima language * ''Tima'' (hydrozoan), a genus of hydrozoans * ''Tima'' (moth) a synonym of the moth genus ''Acontia'' See also {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basal (evolution)
In phylogenetics, basal is the direction of the ''base'' (or root) of a rooted phylogenetic tree or cladogram. The term may be more strictly applied only to nodes adjacent to the root, or more loosely applied to nodes regarded as being close to the root. Note that extant taxa that lie on branches connecting directly to the root are not more closely related to the root than any other extant taxa. While there must always be two or more equally "basal" clades sprouting from the root of every cladogram, those clades may differ widely in taxonomic rank, species diversity, or both. If ''C'' is a basal clade within ''D'' that has the lowest rank of all basal clades within ''D'', ''C'' may be described as ''the'' basal taxon of that rank within ''D''. The concept of a ' key innovation' implies some degree of correlation between evolutionary innovation and diversification. However, such a correlation does not make a given case predicable, so ancestral characters should not be imputed to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superfamily (zoology)
In biological classification, taxonomic rank is the relative level of a group of organisms (a taxon) in an ancestral or hereditary hierarchy. A common system consists of species, genus, family, order, class, phylum, kingdom, domain. While older approaches to taxonomic classification were phenomenological, forming groups on the basis of similarities in appearance, organic structure and behaviour, methods based on genetic analysis have opened the road to cladistics. A given rank subsumes under it less general categories, that is, more specific descriptions of life forms. Above it, each rank is classified within more general categories of organisms and groups of organisms related to each other through inheritance of traits or features from common ancestors. The rank of any ''species'' and the description of its ''genus'' is ''basic''; which means that to identify a particular organism, it is usually not necessary to specify ranks other than these first two. Consider a particul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Families (biology)
Family ( la, familia, plural ') 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". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opinio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioluminescent
Bioluminescence is the production and emission of light by living organisms. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria, and terrestrial arthropods such as fireflies. In some animals, the light is bacteriogenic, produced by symbiotic bacteria such as those from the genus ''Vibrio''; in others, it is autogenic, produced by the animals themselves. In a general sense, the principal chemical reaction in bioluminescence involves a light-emitting molecule and an enzyme, generally called luciferin and luciferase, respectively. Because these are generic names, luciferins and luciferases are often distinguished by the species or group, e.g. firefly luciferin. In all characterized cases, the enzyme catalyzes the oxidation of the luciferin. In some species, the luciferase requires other cofactors, such as calcium or magnesium ions, and some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
