The European Hydromantes salamanders

A photographic database including 1,052 individuals of European Hydromantes. Specifically, the dataset is composed as follows: H. strinatii (Strinati’s cave salamander): 82 individuals (40 females, 33 males, 9 juveniles); H. ambrosii (Ambrosi’s cave salamander): 137 individuals (60 females, 47 males, 30 juveniles); H. italicus (Italian cave salamander): 141 individuals (54 females, 53 males, 34 juveniles); H. flavus (Monte Albo cave salamander): 171 individuals (64 females, 73 males, 34 juveniles); H. supramontis (Supramonte cave salamander): 112 individuals (46 females, 25 males, 41 juveniles); H. imperialis (Imperial cave salamander): 116 individuals (26 females, 63 males, 27 juveniles); H. genei (Gene’s cave salamander): 122 individuals (43 females, 51 males, 28 juveniles); H. sarrabusensis (Sette fratelli cave salamander): 69 individuals (30 females, 27 males, 12 juveniles); Hydromantes hybrids: 55 individuals (32 females, 14 males, 9 juveniles); Hydromantes allochthonous population: 47 individuals.