(or, more generally, recent) organisms. It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members...

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...

In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does...

illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of...

surviving members of the group to indicate otherwise. A living fossil is an extant taxon that appears to have changed so little compared with fossil remains,...

phylogenetic definitions for taxon names as explained below. This contrasts with the traditional method, by which taxon names are defined by a type, which...

bony signature on the skeleton but is not present in either extant sister group to the taxon in question. For example, saying that ceratopsian dinosaurs...

Taxon identifiers Pici Wikidata: Q16542266 Fauna Europaea: 10838 Fauna Europaea (new): ab60f6a5-2974-420e-9763-a9e7ff268889 iNaturalist: 17550 ITIS: 178147...

A living fossil is an extant taxon that phenotypically resembles related species known only from the fossil record. To be considered a living fossil, the...

as shown in the cladogram below: The rank and name used for the taxon holding the extant lycophytes (and their closest extinct relatives) varies widely...