Pego do Diabo vs. the Portuguese Gravettian and the Protoaurignacian of Grotte du Renne level VII: attributes and metrics of the Dufour bladelet category ^(a).

(a) Measurements are in mm. Dufour bladelets are defined inclusively, as in the type-list [57], i.e., subsuming bladelets with only direct, marginal retouch. Grotte du Renne data for retouch mode, inverse-retouched side, and tool tip, are from [77], while metrics and extent of retouch are from [89]; data for the Portuguese Gravettian are from the sites in Table S6[54]. (b) The original width of the blank prior to retouch could be estimated for 78% of the Grotte du Renne material (N = 221): 8.1±2.0 mm. (c) Width/thickness. (d) For the Grotte du Renne complete pieces (N = 10), the height of the arc defined by the ventral side when lying on a flat surface is 1.6±0.9 mm, and the curvature index (length/height) is 5.2±2.3; for the Pego do Diabo material, blank profile is straight in the six Dufour bladelets with alternate retouch (Fig. 9, nos. 12, 14–18; Fig. 11B–D), but curved in the one piece with bilateral direct, marginal retouch (Fig. 9, no. 13; Fig. 11E). (e) The retouch of the remainder is: inverse (92%) for the Grotte du Renne; bilateral-direct and marginal (14%) for Pego do Diabo; bilateral-inverse (4%), inverse (46%), or direct and marginal (31%), for the Gravettian assemblages. (f) At the Grotte du Renne, the inverse retouch of the other 78% is marginal (60%) or abrupt marginal (18%). (g) For the Portuguese Gravettian, based on the 12 pieces with unilateral inverse retouch (the attribute was not recorded in the alternate-retouched specimens from this period); for the Grotte du Renne and Pego do Diabo, based on all pieces with either unilateral-inverse or alternate retouch. (h) As opposed to obtuse or naturally pointed; percentage values calculated over the number of whole or sufficiently complete specimens (at Pego do Diabo, two entire and one distal, plus two mesial fragments—Fig. 9, nos. 14, 17; Fig. 11C—whose distally converging morphology implies a retouch-pointed tip).