Skull Ossification in the Andean Toad Rhinella spinulosa (Bufonidae) and the Genetic Model Organism Xenopus tropicalis (Pipidae) Reveals Heterochrony Phenomena and Frontoparietal Suture Modifications. - Mundaca M; Rojas J; Cumilaf L; Jara F; Muñoz D; Pastenes L; Méndez M; Tovar LM; Torrejón M; Montoya-Sanhueza G; Marcellini S (Journal of experimental zoology. Part B, Molecular and developmental evolution, 2026)