Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Sharing a character state with an ancestral clade; primitive.

from The Century Dictionary and Cyclopedia

  • Same as plesiomorphous.

Etymologies

plesiomorph +‎ -ic (Wiktionary)

Examples

  • You will get larger subsets of traits that contain all plesiomorphic traits plus synapomorphic traits that form grouping of larger subsets of taxa in the clade.

    A Disclaimer for Behe?

  • So cladistics is a reductive method, stripping a defined set of taxa, that have for sure one trait in common, of all distinguishing, autapomorphic traits to arrive at sets of plesiomorphic traits that are common to all taxa in the monophylitic clade.

    A Disclaimer for Behe?

  • Nimbacinus dicksoni, a plesiomorphic thylacine (Marsupialia: Thylacinidae) from Tertiary deposits of Queensland and the Norhtern Territory.

    Australian Fossil Mammal Sites, Australia

  • Interbreeding is plesiomorphic; not interbreeding is apomorphic.

    (UPDATED) Another half-brained science headline - The Panda's Thumb

  • And the pineal eye "third eye" is plesiomorphic for amniotes.

    Life's Time Capsule: The Synapsid Gallery

  • The authors suggest that what they observed may be the ancestral plesiomorphic state of a character that evolved further in the Pacific endodontids.

    Archive 2008-02-01

  • Incipient parental care in Discus - A plesiomorphic state of a truly endodontid character?

    Archive 2008-02-01

  • Something can remain unchanged, in which case it remains underived (plesiomorphic), or it can change, in which case it is derived (apomorphic).

    The words of the world - The Panda's Thumb

  • Our inability to examine the neural characters of a relevant outgroup rhipidistians may result in many sarcopterygian plesiomorphic characters being interpreted as apomorphic characters, due to the wide distribution of paedomorphic characters among living sarcopterygians and their possible resemblance to plesiomorphic characters present in living outgroups that can be examined.

    Panderichthys rhombolepis - The Panda's Thumb

  • However, all five characters may be plesiomorphic for bony fishes.

    Panderichthys rhombolepis - The Panda's Thumb

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