Figure 1

(A) The Eastern Cordillera of Colombia in northern South America. (B,C) Detail of the studied areas from the Bocas and Montebel formations. (D) Stratigraphic columns of the Bocas and Montebel formations showing the stratigraphic position of the studied clam shrimps. Maps drawn with QGIS 3.36 (https://www.qgis.org/en/site/index.html). Stratigraphic columns drawn with Inkscape 1.2.2 (https://inkscape.org/).