derived character

derived character

a characteristic that is considerably altered from the ancestral condition.
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Two taxa are inferred to share a common ancestor to the exclusion of a third taxon if they exhibit derived character states that are not also exhibited by the third taxon.
The position of the transbasal area of the embolus (TBE) provides a derived character state for the genus Notasteron (character 10/2).
Derived characters of single species (autapomorphies, e.
Several papers argue that species are lineages and that derived character states are necessary to identify units of biodiversity.
3; apomorphic refers to a derived character state and plesiomorphic to its ancestral counterpart), Coddington (1988) proposed that one could test the hypothesis of adaptive origin for a trait of interest simply by mapping the character states of sister taxa onto an independently derived cladogram.
Since female care represents the evolution of a derived character state in conjunction with current environmental conditions, cost/benefit analyses in this case would address the question of character origin.
Two unique derived characters included in the analysis are shared by both species of Aleixus, one non-homoplastic and one homoplastic (Fig.
Our results suggest the genus Aleixus should be included in a monophyletic group that shares three non-ambiguous derived characters (Fig.
Students begin with a materials-based problem set that introduces them to concepts of phylogenetic analysis, including homology, convergence, parsimony, and ancestral versus derived characters.
He said: 'The new hominid displays a unique combination of primitive and derived characters, suggesting a close relationship to the last common ancestor between humans and chimpanzees, suggesting him as a likely ancestor of all later hominids.
This chiton retains a mixture of primitive and derived characters that together produce a novel mechanism of fertilization, which is represented on the cover.
Archibald 1994), it is generally accepted that an ancestral taxon must lack uniquely derived characters.