“…Nowadays, this rail is known from just six closely spaced localities in the northern Ciénaga de Zapata (Matanzas province) in south mainland Cuba, based on 14 specimens collected between 1927 and 1934 (all but one in four US museums; Table S1), and a relatively small number of sight records since 1979, most recently in November 2014 (Kirkconnell et al 2020). However, fossil material of Cyanolimnas cerverai dating from the Holocene has been identified from Cueva de Pío Domingo, Sumidero, and Cueva El Abrón, Sierra de La Güira (Pinar del Río province), Cueva de Paredones and Cueva de Sandoval (Artemisa province), Calabazar (La Habana province), Cueva de Insunsa, Cuevas de Las Charcas and Cueva del Indio (all in Mayabeque province), near Jagüey Grande (Matanzas province), Cueva de Humboldt and Cueva del Salón (Sancti Spíritus province), and the Sierra de Caballos in the northern Isle of Pines (Olson 1974;Arredondo 1984;Jiménez and Valdés 1995;Rojas-Consuegra et al 2012;Jiménez and Orihuela 2021;Suárez 2022), i.e., over a much larger area than the known modern range.…”