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1A characteristic present in an ancestral species and shared exclusively (in more or less modified form) by its evolutionary descendants.
- ‘This observation hints at one putative morphological synapomorphy of a Petopentia / Periploca clade.’
- ‘Those specimens include conclusive evidence of the strongest possible bird-theropod synapomorphy - completely modern feathers and the oldest, most birdlike dromaeosaurs.’
- ‘The only known synapomorphy of this group is the presence of a sesamoid bone in the heel region.’
- ‘These four genera form a monophyletic group defined by one synapomorphy (loss of one anterior left marginal).’
- ‘But this is not very convincing, as it reveals only one valid synapomorphy.’
- 1.1 Possession by two or more organisms of a characteristic inherited exclusively from their common ancestor.
- ‘Based on cell lineages, the blastomere-by-blastomere derivation of most major larval organs, there is good reason to infer synapomorphy across the larvae of most lophotrochozoan phyla, if not the lophophorates.’
- ‘It is through cladistic analysis that we are able to tell homoplasy from synapomorphy.’
- ‘Thus, when a SINE sequence is found at an orthologous locus in two or more lineages, it can be regarded as evidence for synapomorphy.’
- ‘This conflict can be resolved as either parallelism, reversal, or synapomorphy.’
- ‘The diagnosis of Glades through synapomorphy becomes the starting point for the investigation of functional, temporal, adaptive and biogeographic questions.’
1960s: from syn- ‘together’+ apo- ‘away from’ + Greek morphē ‘form’.
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