Animal Evolution: Stiff or Squishy Notochord Origins?

Animal Evolution: Stiff or Squishy Notochord Origins?

The notochord is considered an evolutionary novelty and one of the defining characters of chordates. A new study of an annelid challenges this view and proposes an earlier evolutionary origin in the most recent common ancestor of chordates and annelids. The notochord is considered an evolutionary no...

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Veröffentlicht in:Current biology 2014-12, Vol.24 (23), p.R1131-R1133
Hauptverfasser: Hejnol, Andreas, Lowe, Christopher J.
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Biological Evolution
Branchiostoma
Chorda
Chordata
Mesoderm - embryology
Myxinidae
Notochord - embryology
Polychaeta - classification
Polychaeta - embryology
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Beschreibung
Zusammenfassung:The notochord is considered an evolutionary novelty and one of the defining characters of chordates. A new study of an annelid challenges this view and proposes an earlier evolutionary origin in the most recent common ancestor of chordates and annelids. The notochord is considered an evolutionary novelty and one of the defining characters of chordates. A new study of an annelid challenges this view and proposes an earlier evolutionary origin in the most recent common ancestor of chordates and annelids.
ISSN:0960-9822
1879-0445
DOI:10.1016/j.cub.2014.10.059