Shared derived character state that unites two or more members of a monophyletic group, e.g. the presence of a glandular collar at the leaflet base is a synapomorphy for a monophyletic group comprising Zamia macrochiera and Z. manicata; a synapomorphy at one level is an autoapomorphy at a more inclusive level.

Expanded glossary of Cycad terms . 2014.

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