Nuptial pads of rock frogs (Thoropa, Cycloramphidae, Anura): how papillary epidermal projections are related to sexual maturity and taxonomy - Sabbag, Ariadne Fares; Grant, Taran; Dodonov, Pavel; Brasileiro, Cinthia Aguirre; Haddad, Célio Fernando Baptista (Zoologischer Anzeiger, 2022)