First record of angiosperm fossil leaf from the Coris Formation (middle Miocene) of the Central Valley, Costa Rica - Marco A. Rubalcava-Knoth; Mario A. Blanco; Rafael Acuña-Castillo; Guillermo E. Alvarado; Luis A. Gamboa; Sergio R.S. Cevallos-Ferriz (Journal of South American Earth Sciences, 2026)