synapomorphy

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Related to Synapomorphic: Apomorphy

synapomorphy

(si-nap'ō-mōr-fē),
Species-specific unique embryologic features.
[syn- + apo- + morph- + -y]

synapomorphy

(sĭ-năp′ə-môr′fē)
n. pl. synapomor·phies
An evolved character or trait that is shared by two or more taxonomic groups and is considered to have originated in their common ancestor. Hair is synapomorphic for marsupials, primates, and all other taxa that are grouped together in the class Mammalia.

syn·ap′o·mor′phic adj.

synapomorphy

the sharing of derived characters by different species.
References in periodicals archive ?
The value presented by this femur for the ratio transverse/anteroposterior width fits in the range that seems to be synapomorphic of the Titanosauriformes (Wilson, 2002; Upchurch et al.
presence of a posttemporal fenestra), this feature has been regarded as synapomorphic for the genus Ceratophrys by previous authors (PERI, 1993).
tree length, CI and RI) indicated more synapomorphic value and less homoplasy when urogenital duct characters were optimized to a phylogeny with a monophyletic Salamandroidea.
Beside the characters listed as synapomorphic for Gerromorpha (Andersen 1982; Wheeler et al.
Spikelet pairing is generally cited as synapomorphic for Andropogoneae, but developmental studies show that it must be a deeper synapomorphy, because it appears in other Panicoideae such as Ixophorus (Kellogg et al.
This clade is supported by unambiguous synapomorphic characters (CI=1 and RI=1) such as the lateral edges of the clypeus strongly elevated over the eyes (character 2) and a well developed frontal carina (character 3).
stramineum was based on the autoapomorphies present in this species and in the lack of synapomorphic morphological characters joining S.
The White Narrows Xantusia specimens are similar to those described by Norell in that they are all characterized by small size, the plesiomorphic presence of a dental gutter, and the synapomorphic reduction of tricuspid teeth.
For change in capture thread composition and web features to qualify as key innovations, we propose that three criteria must be met: (1) they must be synapomorphic for araneoids; (2) these features must confer a functional advantage over the plesiomorphic condition in deinopoids; and (3) they must be correlated with a change in or expansion in the "adaptive zone" that orb-weaving spiders occupy.
This is the distinguishing synapomorphic feature of eucryptodires as described by Gaffney (1975:427; 1976:536) and Gaffney and Meylan (1988:177).
There were 143 nonsynonymous synapomorphic mutations of interest, of which 114 were unique to genotype L.
More precisely, Barilium and Delapparentia share a synapomorphic preacetabular process (McDonald, 2012a: character 110) and lack the laterally everted rim shared by all other basal iguanodontoids, which becomes pendant in derived forms (McDonald, 2012a: character 112).