Hagfish embryology with reference to the evolution of the neural crest

Kinya G. Ota, Shigehiro Kuraku and Shigeru Kuratani ()
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Kinya G. Ota: Laboratory for Evolutionary Morphology, Center for Developmental Biology, RIKEN, Kobe 650-0047, Japan
Shigehiro Kuraku: Laboratory for Evolutionary Morphology, Center for Developmental Biology, RIKEN, Kobe 650-0047, Japan
Shigeru Kuratani: Laboratory for Evolutionary Morphology, Center for Developmental Biology, RIKEN, Kobe 650-0047, Japan

Nature, 2007, vol. 446, issue 7136, 672-675

Abstract: Vertebrate origins Hagfish, jawless vertebrates related to lampreys, are the most primitive surviving vertebrates. So primitive that they do not have vertebrae. Studies on the development of this creature would reveal a great deal about vertebrate origins, but such studies have been foiled by the extreme difficulty in obtaining viable embryos. Bashford Dean published the first hagfish embryology study in 1899 and few attempts have since been made. Now a team at the RIKEN Centre for Developmental Biology at Kobe present, at last, a landmark study of hagfish embryology. They obtained six embryos of the hagfish Eptatretus burgeri in the lab aquarium and excised the embryos from the egg shell before fixation, thus avoiding the tissue distortion that Dean encountered a century earlier. The resulting histology reveals genetic markers linked to the development of neural crest — a key vertebrate character — similar to the course of events in lampreys.

Date: 2007
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DOI: 10.1038/nature05633

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