Jawless Fishes (Cyclostomata)

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2009
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Ota, Kinya G.
Kuratani, Shigeru
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Published
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S. BLAIR HEDGES, , ed., Sudhir KUMAR, ed.. The timetree of life. Oxford: Oxford University Press, 2009, pp. 317-318
Zusammenfassung

Cyclostomata comprises two families of living jawless fishes: hagfishes (Myxinidae, 44 species) and lampreys (Petromyzonidae, 41 species). Morphological analyses have favored the closer relationship of lampreys to jawed vertebrates (gnathostomes) than to hagfishes. However, most of the recent molecular phylogenetic analyses have supported a hagfish-lamprey relationship. The estimated divergence time for hagfishes and lampreys among several studies averages 482 million years ago (Ma), but varies (520-432 Ma) depending mostly on the assumed timing of the cyclostome-gnathostome divergence. Nonetheless, there is agreement that hagfish and lamprey lineages diverged relatively shortly (within 100 million years) after the divergence of cyclostomes and gnathostomes.

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570 Biowissenschaften, Biologie
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ISO 690KURAKU, Shigehiro, Kinya G. OTA, Shigeru KURATANI, 2009. Jawless Fishes (Cyclostomata). In: S. BLAIR HEDGES, , ed., Sudhir KUMAR, ed.. The timetree of life. Oxford: Oxford University Press, 2009, pp. 317-318
BibTex
@incollection{Kuraku2009Jawle-1045,
  year={2009},
  title={Jawless Fishes (Cyclostomata)},
  publisher={Oxford University Press},
  address={Oxford},
  booktitle={The timetree of life},
  pages={317--318},
  editor={S. Blair Hedges and Kumar, Sudhir},
  author={Kuraku, Shigehiro and Ota, Kinya G. and Kuratani, Shigeru}
}
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