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Urbilaterian vs Bilaterian - What's the difference?

urbilaterian | bilaterian | Derived terms |

Urbilaterian is a derived term of bilaterian.


In biology|lang=en terms the difference between urbilaterian and bilaterian

is that urbilaterian is (biology) the hypothetical last common ancestor to all bilaterians while bilaterian is (biology) any animal that has bilateral symmetry, collectively grouped in the clade bilateria.

As nouns the difference between urbilaterian and bilaterian

is that urbilaterian is (biology) the hypothetical last common ancestor to all bilaterians while bilaterian is (biology) any animal that has bilateral symmetry, collectively grouped in the clade bilateria.

urbilaterian

English

(wikipedia urbilaterian)

Noun

(en noun)
  • (biology) The hypothetical last common ancestor to all bilaterians.
  • * 2007 , Aaron G. Filler, The Upright Ape: A New Origin of the Species , page 153,
    • There is no fossil record to show that the urbilaterian existed. However, the echoes of the existence of this creature are recorded in stunning clarity in the genes of every living descendant, from fruit fly to spider to human.
  • * 2008 , Philosophical Transactions: Biological Sciences , Volume 363, Issues 1493-1496, page 1523,
    • This way, different aspects of the molecular architecture of the urbilaterian nervous system are reconstructed and yield insight into the degree of centralization that was in place in the bilaterian ancestors.
  • * 2011 , Wallace Arthur, Evolution: A Developmental Approach , unnumbered page,
    • The competing hypotheses of simple and complex urbilaterians are still being debated at the time of writing.

    bilaterian

    English

    (Bilateria)

    Noun

    (en noun)
  • (biology) Any animal that has bilateral symmetry, collectively grouped in the clade Bilateria.
  • * 2005 , N. S. Sharma, Continuity And Evolution Of Animals , page 91,
    • Whatever the phylogenetic relationship among bilaterians' and the diploblastic phyla, there was clearly a significant expansion in genomic information within the internode that connects the ' bilaterian clade to other branches.
  • * 2007', J. W. Valentine, ''Seeing ghosts: Neoproterozoic '''bilaterian body plans'', Patricia Vickers-Rich, Patricia Komarower (editors), ''The Rise and Fall of the Ediacaran Biota , [page 372],
    • Lacking body cavities and both circulatory and excretory organs, with subepidermal nerve plexuses and 'brains' represented, if at all, by thickened anterior commissures, and with simple reproductive set-ups, acoels come close to representing a model stem ancestor for bilaterians .
  • * 2010 , José Xavier-Neto, Marcos Sawada Simoes-Costa, Rodrigo Abe Castro, Hozana Andrade Castillo, Allysson Coelho Sampaio, Ana Paula Azambuja, Chapter 1.1: Evolutionary Origins of Hearts'', Nadia Rosenthal, Richard P. Harvey (editors), ''Heart Development and Regeneration , Volume 1, page 12,
    • In most bilaterians , the gut musculature and most vascular muscles derive from the mesoderm.

    Derived terms

    * urbilaterian