apomorphy
a state derived by evolution from a primitive state (plesiomorphy); applied to a character, not a taxon. It relates to the compared character state and the hierarchical level considered, i.e. the character is apomorphic in relation to one state but plesiomorphic to another

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • apomorphy — n. [Gr. apo, away; morphe, form] A term pertaining to derived characters, normally used in cladistic taxonomy …   Dictionary of invertebrate zoology

  • apomorphy — noun A derived characteristic of a clade. Any feature novel to a species and its descendants. Ant: plesiomorphy …   Wiktionary

  • apomorphy —   Derived character or character state.   See also autoapomorphy, homology, plesiomorphy, symplesiomorphy, synapomorphy …   Expanded glossary of Cycad terms

  • apomorphy — …   Useful english dictionary

  • Cladistics — For the scientific journal, see Cladistics (journal). Part of a series on Evolutionary Biology …   Wikipedia

  • Clade — For other uses, see Clade (disambiguation). Cladogram (family tree) of a biological group. The red and blue boxes represent clades (i.e., complete branches). The green box is not a clade, but rather represents an evolutionary grade, an incomplete …   Wikipedia

  • Synapomorphy — In evolutionary biology, a synapomorphy is a derived character state shared by two or more terminal groups (taxa included in a cladistic analysis as further indivisible units) and inherited from their most recent common ancestor. Derived in this… …   Wikipedia

  • Paraphyly — A cladogram showing a hypothetical descent from an ancestor species of the clade vertebrata.[1] Note that cladograms do not necessarily correspond to taxonomic classifications. In this one, Sauropsida are a paraphyletic group. It can be made… …   Wikipedia

  • PhyloCode — The International Code of Phylogenetic Nomenclature , known for short as the PhyloCode , is a developing draft for a formal set of rules governing phylogenetic nomenclature. Its current version is specifically designed to regulate the naming of… …   Wikipedia

  • Ornithurae — Ornithurans Temporal range: Early Cretaceous–Recent, 136–0 Ma …   Wikipedia

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