Douvilleiceras mammillatum-zone, Early Albian, Early Cretaceous [details]
Old Hachita Member, U-Bar Formation [details]
NMMNH locality L-3413 (UTM Zone 13, NAD27, 745525E, 3493350N), L-3414 (UTM 745871E, 3492987N), western flank of ... [details]
HT: NMMNH P-26515 (from loc. L-34-14); PT: NMMNH P-26501, P-26508 (from loc. L-3413), 26517 (from loc. L-3414) [details]