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Table 1 Location, position in the transect and sample size for 17 Bufo populations included in the study. Toads studied are adults except for populations 1–3 and 5 where tadpoles were sampled

From: Concordant morphological and molecular clines in a contact zone of the Common and Spined toad (Bufo bufo and B. spinosus) in the northwest of France

Locality Coordinates Altitude (m.a.s.l.) from Google Earth Straight line distance from Beaulieu (km) Sample size
Population Name Northern latitude Eastern longitude Morphology (males, females) Micro-satellites SNPs
1 Le Poitrineau, Saumur 47.281 −0.132 65 −168.68 0 12 12
2 Étang du Perré 47.526 −0.020 92 −140.34 0 8 8
3 Les Tesnières, Durtal 47.672 −0.265 61 −134.96 0 8 8
4 Carrefour du Poteau, Jublains 48.240 −0.552 138 −107.74 27 (13, 14) 14 29
5 Les Fontaines, Pré-en-Pail 48.447 −0.201 285 −74.53 0 8 8
6 Foret de Multonne, Mont des Avaloirs 48.443 −0.132 329 −69.90 20 (18, 2) 20 20
7 Montmean, Bazoches-sur-Hoëne 48.543 0.508 210 −23.19 18 (15, 3) 31 32
8 La Couvendière, Mortagne au Perche 48.572 0.595 223 −16.34 22 (20, 2) 22 22
9 La Rosière, Foret du Perche et de la Trappe 48.600 0.639 277 −11.85 20 (18, 2) 19 20
10 Beaulieu 48.679 0.746 203 0 52 (26, 26) 40 52
11 Chateau des Bois Francs 48.719 0.832 201 7.73 2 (1, 1) 10 10
12 le Cottin 48.724 0.827 204 7.72 18 (17,1) 18 18
13 Les Quatre Vouges 48.800 1.016 175 23.95 15 (12, 3) 23 23
14 Mouettes 48.896 1.363 131 51.34 2 (2, 0) 10 10
15 Mare du Bois, La Houssaye 48.886 1.381 130 52.01 23 (22, 1) 23 23
16 Les Puits du Sarrasin, Erloy 49.915 3.847 122 264.06 25 (15, 10) 20 27
17 Les Ajoncs, Audresselles 50.821 1.602 8 246.10 22 (11, 11) 14 22
Total       266 (190, 76) 300 344
Missing data (%)      0.0 1.8 1.2