1. Ecology
  2. Evolutionary Biology
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Cardiac Development: Getting to the heart of a good fossil

  1. John A Long  Is a corresponding author
  1. Flinders University, Australia
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Cite this article as: eLife 2016;5:e16207 doi: 10.7554/eLife.16207
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The fossil heart data from Rhacolepis shows an intermediate condition between the many-valved types seen in basal ray-finned fishes (actinopterygians) like Polypteriformes (the order that includes the African reedfish) and the single-valved hearts in modern teleosts.

Images of the hearts showing valves (red) are oriented with the top of the image pointing towards the head of the fish (taken from Maldanis et al., 2016).

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