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. 2017 Sep 5;12(9):e0181980. doi: 10.1371/journal.pone.0181980

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© 2017 Park et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 5 — (a, b) Internal whole valve having the central fultoportula (cfp, white arrow), one ring of marginal fultoportula (mfp, white arrow), and radially sessile rimoportula (rp, black arrow). (c) Rimoportula (rp, black arrow) between the central (cfp) and marginal fultoportula (mfp). Each fultoportula consist of strutted tube (st, white arrowhead), satellite pore cover (slpc, blue arrowheads), and satellite pore (slp, black arrowheads). (d) Central strutted tube (st, white arrows) with two satellite pore covers (slpc, blue arrowheads) and elliptical donut-shaped rimoportula (rp, black arrow). (e, f) Marginal fultoportula consist of strutted tube (st, white arrowhead), satellite pore covers (slpc, blue arrowheads), and satellite pores (slp, black aorrwheads). Scale bars are 1 μm.