Definition of Plesiomorphy. Meaning of Plesiomorphy. Synonyms of Plesiomorphy

- In phylogenetics, a plesiomorphy ("near form") and symplesiomorphy are synonyms for an ancestral character shared by all members of a clade, which does...
- character or character state that has evolved from its ancestral form (or plesiomorphy). A synapomorphy is an apomorphy shared by two or more taxa and is therefore...
- but it has since been recognized that this was solely on the basis of plesiomorphies; they are now considered to belong to older branches of Metatheria that...
- however. Researchers must decide which character states are "ancestral" (plesiomorphies) and which are derived (synapomorphies), because only synapomorphic...
- in different groups (homoplasies) or those left over from ancestors (plesiomorphies) – and derived characters, which have been p****ed down from innovations...
- used to identify shared or distinct character states among groups: A plesiomorphy ("close form") or ancestral state is a character state that a taxon has...
- in non-vascular ("lower") and vascular ("higher") plants). The terms "plesiomorphy" and "apomorphy" are typically used in the technical literature: for...
- through a measure of overall similarity, making no distinction between plesiomorphies (shared ancestral traits) and apomorphies (derived traits). From the...
- for the ginkgo and the cycads, making it a shared conserved trait—a plesiomorphy—and implying these two groups themselves form a clade, sharing a common...
- all of the classes mentioned in accompanying text. Pentaradiality as a plesiomorphy Supporters of pentaradiality as an initial condition of the phylum note...