Dictionary of Human Evolution and Biology

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Apomorph

1. structural feature found in an evolving lineage that is distinct from that of the ancestral line. Adjective: apomorphic, apomorphous, aka derived.

See derived trait and synapomorphy.

2. any new morphological, chromosomal or molecular feature that has appeared in an evolving lineage that may indicate a node of divergence, or branch; see cladogenesis.

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