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. 2017 Nov 1;284(1866):20171800. doi: 10.1098/rspb.2017.1800

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© 2017 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 1. — Distribution of (a) S. zenkeri and (b) G. suaveolens. White dots represent samples in this study; black dots represent all remaining locations based on herbarium vouchers (BR, BRLU, WAG, LBV, MO, Index Herbariorum, http://seetgum.nybg.org/ih/) and tree inventories. Both species are widespread in the Congo Basin, the low number of occurrences just reflecting limited sampling effort by the scientific community. Forest refugia during the Last Glacial Maximum, modified from Maley (a): CVL, Cameroonian Volcanic Line; NM, Ngovayan Massif; AC, Alen-Cristal; D, Doudou; CH, Chaillu; M, Mayombé; CB, Congo Basin; EC, Eastern Congo. Countries (b): CMR, Cameroon; CAR, Central African Republic; GUI, Equatorial Guinea; GAB, Gabon; CON, Republic of the Congo; CDR, Congo Democratic Republic.