- plesiomorphy
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A character state that is present in both outgroups and in the ancestors
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plesiomorphy
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plesiomorphy — Ancestral or underived character or character state; note that a plesiomorphy at a given hierarchical level may be an apomorphy at a more inclusive level. See also autoapomorphy, homology, symplesiomorphy, synapomorphy … Expanded glossary of Cycad terms
plesiomorphy — an ancestral character state; the state from which an apomorphy is derived; usually and correctly applied to a specific character and not to a taxon. Note that derived states need not be more complex than plesiomorphic states and so the… … Dictionary of ichthyology
plesiomorphy — n. [Gr. plesios, near; morphos, form] A term referring to original or primitive characters being retained; normally used in cladistic taxonomy; see apomorphy, symplesiomorph … Dictionary of invertebrate zoology
Cladistics — For the scientific journal, see Cladistics (journal). Part of a series on Evolutionary Biology … 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
Tinamou — Temporal range: Miocene Recent 12–0 Ma … Wikipedia
Erik Jarvik — Anders Erik Vilhelm Jarvik (30 November 1907 ndash; January 11, 1998) was a Swedish palaeozoologist who worked extensively on the sarcopterygian (or lobe finned) fish Eusthenopteron . In a career that spanned some 60 years, Jarvik produced some… … Wikipedia
Gallotia — Taxobox name = Gallotia image width = 250px image caption = Tenerife Lizard ( Gallotia galloti galloti ) male (top) and female regnum = Animalia phylum = Chordata classis = Reptilia ordo = Squamata familia = Lacertidae subfamilia = Gallotiinae… … Wikipedia
Morphology (biology) — In biology, morphology is a branch of bioscience dealing with the study of the form and structure of organisms and their specific structural features.[1][2][3][4][5][6] … Wikipedia
Psittacosaurus — Taxobox name = Psittacosaurus fossil range = Early Cretaceous image width = 200px image caption = Mounted cast of a Psittacosaurus mongoliensis skull at the Australian Museum, Sydney. regnum = Animalia phylum = Chordata classis = Sauropsida… … Wikipedia
