Geographic distributions of <i>Parascolymia/Circophyllia</i> (red dots) and tridacnines (blue squares,) in the Eocene, Oligocene to middle Miocene, and late Miocene to Holocene time slices.

<p>Coral occurrences refer to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132243#pone.0132243.t001" target="_blank">Table 1</a> and tridacnine distributions are compiled from [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132243#pone.0132243.ref026" target="_blank">26</a>,<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132243#pone.0132243.ref069" target="_blank">69</a>]. The red shaded areas indicate the recent distribution of <i>Parascolymia vitiensis</i> [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132243#pone.0132243.ref007" target="_blank">7</a>] and the red circles delimit biodiversity hotspots in the respective periods [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132243#pone.0132243.ref010" target="_blank">10</a>].</p>