Comparative osteology of the fossorial frogs of the genus Synapturanus (Anura, Microhylidae) with the description of three new species from the Eastern Guiana Shield - Fouquet, Antoine; Leblanc, Killian; Fabre, Anne-Claire; Rodrigues, Miguel Trefaut; Menin, Marcelo; Courtois, Elodie A; Dewynter, Maël; Hölting, Monique; Ernst, Raffael; Peloso, Pedro; Kok, Philippe J.R (Zoologischer Anzeiger, 2021)