WebNeontology is a part of biology that, in contrast to paleontology, deals with living (or, more generally, recent) organisms.It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct.For example: The moose (Alces alces) is an extant species, and the dodo …

WebExtinction is the termination of a kind of organism or of a group of kinds (), usually a species.The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this …

WebExtant is the opposite of the word extinct.It may refer to: Extant hereditary titles; Extant literature, surviving literature, such as Beowulf, the oldest extant manuscript written in English; Extant taxon, a taxon which is not extinct, such as an extant species; Extant Theatre Company, a disability arts organisation; Extant, an American television series ...

WebIn biology, a monotypic taxon is a taxonomic group that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the …

WebLinnaean taxonomy can mean either of two related concepts: . The particular form of biological classification (taxonomy) set up by Carl Linnaeus, as set forth in his Systema Naturae (1735) and subsequent works. In the taxonomy of Linnaeus there are three kingdoms, divided into classes, and they, in turn, into lower ranks in a hierarchical order.; …

WebA pteridophyte is a vascular plant (with xylem and phloem) that disperses spores.Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails (often treated as ferns), and lycophytes (clubmosses, spikemosses, and quillworts) are all …

WebIn biology, taxonomy (from Ancient Greek τάξις () 'arrangement', and -νομία () 'method') is the scientific study of naming, defining (circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxa (singular: taxon) and these groups are given a taxonomic rank; groups of a given rank can be …

WebThe Mustelidae (/ m ʌ ˈ s t ɛ l ɪ d iː /; from Latin mustela, weasel) are a family of carnivorous mammals, including weasels, badgers, otters, ferrets, martens, minks and wolverines, among others. Mustelids (/ ˈ m ʌ s t ɪ l ɪ d z /) are a diverse group and form the largest family in the suborder Caniformia of the order Carnivora.They comprise about 66 to 70 species …

WebThe trumpeter swan (Cygnus buccinator) is a species of swan found in North America.The heaviest living bird native to North America, it is also the largest extant species of waterfowl, with a wingspan of 185 to 250 cm (6 ft 2 in to 8 ft 2 in). It is the American counterpart and a close relative of the whooper swan (Cygnus cygnus) of Eurasia, and even has been …

WebTaxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC.