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plesiomorphy (pl. Plesiomorphies), plesiomorphic character
Glossary of "Cladistics (2nd ed.)" by Kitching et al. (1998)
- (1) An apomorphy of a more inclusive hierarchical level than that being considered. (2) An ancestral or primitive character or character state. Cf. also apomorphy.
Glossary of Plant Systematics (1st ed.) by Simpson (2006)
Glossary of "Plant Systematics (3rd ed.)" by Judd et al. (2008)
- Ancestral character state; also called a plesiomorphic character state.
"Phylogenetics" by Wiley (1981), p. 122
- Of a pair of homologues, the plesiomorphic character is the character that arose earlier in time and gave rise to the later, apomorphic, character.
- Plesiomorphic character is frequently shortened to "plesiomorphy". Synonyms include: plesiotypic character, plesiotypy, plesiomorphous character, primitive character, ancestral character, and generalized character.
- Wiley, E. O. 1981. Phylogenetics: the Theory and Practice of Phylogenetic Systematics. -xv + 439 pp. John Wiley & Sons, Inc., New York.
- Kitching, I. J., Forey, P. L. Humphries, C. J. & Williams, D. M. 1998. Cladistics, 2nd ed.: the Theory and Practice of Parsimony Analysis. -xii + 228 pp. Oxford University Press, New York.
- Simpson, M. G. 2006. Plant Systematics. -xi + 590 pp. Elsevier Academic Press, Oxford.
- Judd, W. S., Campbell, C. S., Kellogg, E. A., Stevens, P. F., Donoghue, M. J. 2008. Plant Systematics: A Phylogenetic Approach, 3rd ed. -xv + 611 pp. Sinauer Associates, Inc., Sunderland.