Fig. 1. A in An Early Triassic gladius associated with soft tissue remains from Idaho, USA-a squid-like coleoid cephalopod at the onset of Mesozoic Era

Fig. 1. A. Palaeogeographic map of the western USA basin during the Early Triassic. B. Present-day location of the studied exposure. C. Synthetic stratigraphical and lithological succession of the Bear Lake area (after Romano et al. 2013) with position of the studied specimen. Ammonoid zonation after Jenks et al. (2013) and Jattiot et al. (2016). Stratigraphy follows the main units defined by Kummel (1954). Radiometric ages after Galfetti et al. (2007) and Burgess et al. (2014). Abbreviations: LL, Lower Limestone; LS,Lower Shale; ML, Middle Limestone; MS, Middle Shale; UCS, Upper Calcareous Siltstone.