FIGURE 2 in Morphological insights into the lobster genus Uncina Quenstedt, 1851 based on new material from the Ya Ha Tinda Konservat-Lagerstätte, Canada (Early Jurassic)

FIGURE 2. Stratigraphic column of the East Tributary of Bighorn Creek section, Ya Ha Tinda Ranch, Alberta, Canada. Symbols denote the stratigraphic heights at which crustacean material was found as well as the elements and species (if applicable). Sepent. = Serpentinum, Falcif. = Falciferum, Eu = Europe, NA = North America. Lithostratigraphy and carbon isotope curve from Them et al. (2017) and fossil heights from Martindale et al. (2017). Some specimens are not reported from a particular horizon; instead, the collector Russell Hall (an ammonite biostratigrapher) noted the ammonite zone and so the age is assumed to be correct (dashed range). Specimens found in float from East Tributary can be assigned a minimum age; the river cuts up-section and so specimens not found in situ are interpreted to have originated from strata that are stratigraphically below the horizon in which they were found (dashed arrow).