Developmental Biology of Hagfishes, with a Report on Newly Obtained Embryos of the Japanese Inshore Hagfish, Eptatretus burgeri

@inproceedings{Ota2008DevelopmentalBO,
  title={Developmental Biology of Hagfishes, with a Report on Newly Obtained Embryos of the Japanese Inshore Hagfish, Eptatretus burgeri},
  author={Kinya G Ota and Shigeru Kuratani},
  booktitle={Zoological science},
  year={2008}
}
Abstract The apparently primitive features of hagfishes are recognized as a crucial problem in the study of vertebrate evolution, although the monophyletic relationship between these animals and lampreys has been confirmed by large amounts of molecular data, including genome and EST sequences. To solve this problem requires knowledge of the developmental biology of hagfishes. We attempted to obtain embryos from the Japanese inshore hagfish (Eptatretus burgeri) and succeeded in preparing several… Expand
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TLDR
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TLDR
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References

SHOWING 1-10 OF 116 REFERENCES
Hagfish embryology with reference to the evolution of the neural crest
TLDR
It is proposed that the neural crest emerged as a population of de-epithelialized migratory cells in a common vertebrate ancestor, and it is suggested that the possibility of classical and molecular embryology in hagfish opens up new approaches to clarifying the evolutionary history of vertebrates. Expand
Ontogeny of the head of the Pacific hagfish (Eptatretus stouti, Myxinoidea): development of the lateral line system.
  • H. Wicht, R. Northcutt
  • Biology, Medicine
  • Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 1995
TLDR
It is found that an embryonic lateral line system is present in hagfishes, and that the grooves of adult hagFishes in all probability derive from lateral line placodes, which is a primitive character of craniates. Expand
Embryology of the lamprey and evolution of the vertebrate jaw: insights from molecular and developmental perspectives.
TLDR
The gnathostome jaw may have arisen through a process of ontogenetic repatterning, in which a heterotopic shift of mesenchyme-epithelial relationships would have been involved. Expand
Lamprey as an evo‐devo model: Lessons from comparative embryology and molecular phylogenetics
TLDR
In this review, recent molecular developmental and evolutionary molecular research on the living lampreys are summarized and discussed, taking vertebrate comparative morphology and embryology into consideration. Expand
The History of Scientific Endeavors Towards Understanding Hagfish Embryology
TLDR
This review summarizes the importance of hagfish embryology from a phylogenetic perspective, and the history of attempts to obtain hag fish eggs and embryos, and discusses the future prospects for obtaining embryological material, both from the wild and in the laboratory. Expand
Hagfish embryos again: the end of a long drought.
  • N. Holland
  • Biology, Medicine
  • BioEssays : news and reviews in molecular, cellular and developmental biology
  • 2007
TLDR
Because hagfish embryos should now be available on a regular basis, the way is open for additional morphological and developmental genetic investigations to help evaluate existing evolutionary scenarios and perhaps suggest new ones. Expand
28S and 18S rDNA sequences support the monophyly of lampreys and hagfishes.
TLDR
Moderate to very strong support is provided for the monophyly of the cyclostomes in lampreys plus hagfishes and the currently accepted hypothesis of a lamprey-gnathostome clade is moderately rejected by the Kishino-Hasegawa test and resoundingly rejected by parametric bootstrap tests. Expand
Complete mitochondrial DNA of the hagfish, Eptatretus burgeri: the comparative analysis of mitochondrial DNA sequences strongly supports the cyclostome monophyly.
TLDR
Molecular data, i.e., results and those obtained using nuclear genes, conclude that hagfishes and lampreys form a clade, and unequivocally supported the monophyly of cyclostomes. Expand
Head and backbone of the Early Cambrian vertebrate Haikouichthys
TLDR
Phylogenetic analysis indicates that Haikouichthys somewhat resembles the ammocoete larva of modern lampreys, this is because of shared general craniate characters; adult lampreys and hagfishes (the cyclostomes if monophyletic) are probably derived in many respects. Expand
Monophyly of Lampreys and Hagfishes Supported by Nuclear DNA–Coded Genes
TLDR
Cl cloning and sequencing of the four nuclear DNA–coded single-copy genes encoding the triose phosphate isomerase, calreticulin, and the largest subunit of RNA polymerase II and III were conducted, and it was shown that all the five proteins prefer the monophyletic tree of cyclostomes, which significantly supports the cyclostome monophyly at the level of ±1 SE. Expand
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