Samples dated, with the grave number, bone type and sample weight.

<p>Samples dated, with the grave number, bone type and sample weight.</p

The individual found in a primary position in Grave 12 was possibly bound up when buried (Photograph in Aparicio 2008 [28]: 135).

<p>The individual found in a primary position in Grave 12 was possibly bound up when buried (Photograph in Aparicio 2008 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0115505#pone.0115505.ref028" target="_blank">28</a>]: 135).</p

Photographs of Graves 4, 5, 6 and 13 in El Collado cemetery.

<p>Photographs of Graves 4, 5, 6 and 13 in El Collado cemetery.</p

Plan with the position of the graves at El Collado and the corrected BP dates (except Individuals 9 and 13, for which no isotope data is available. See Table 4).

<p>Plan with the position of the graves at El Collado and the corrected BP dates (except Individuals 9 and 13, for which no isotope data is available. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0115505#pone.0115505.t004" target="_blank">Table 4</a>).</p

AMS radiocarbon dates on bone collagen of the human burials from El Collado.

<p>AMS radiocarbon dates on bone collagen of the human burials from El Collado.</p

Sex and age at death of the individuals.

<p>Sex and age at death of the individuals.</p

Synthetic description of the stratigraphic sequence at El Collado, based on the interpretation of the published lithic assemblages [28] and recent unpublished studies of Squares FIII, FIV, FV and GIII.

<p>Synthetic description of the stratigraphic sequence at El Collado, based on the interpretation of the published lithic assemblages [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0115505#pone.0115505.ref028" target="_blank">28</a>] and recent unpublished studies of Squares FIII, FIV, FV and GIII.</p

Stratigraphy at El Collado (Section B-C).

<p>Photograph published in Aparicio 2008 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0115505#pone.0115505.ref028" target="_blank">28</a>], page 112.</p

Location of the most important Mesolithic cemeteries with two or more individuals in a primary position.

<p>1. El Collado, 2. Casa Corona, 3. Mas Nou, 4. Los Canes, 5. La Braña, 6–9. Muge Area (Cabeço da Amoreiras, Moita de Sebastião, Cabeço da Arruda, Cova de Onça), 10–12. Sado Area (Amoreiras, Arapouco, Cabeço do Pez), 13. Samouqueira.</p

Oxcal three phase overlapping model with the 95.4% distribution chronological ranges of the boundary start and end in the Iberian Mediterranean, Cantabrian and Portugal regional units.

<p>Oxcal three phase overlapping model with the 95.4% distribution chronological ranges of the boundary start and end in the Iberian Mediterranean, Cantabrian and Portugal regional units.</p