APPENDIX 1.
Supplementary figures to manuscript.
FIGURE S1. MicroCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. The external surface of the crab is translucent to show the position of the preserved internal structures that the scan detected. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles; purple-pink: possible anterior gastric muscles. A, dorsal view. B, frontal view. C, right lateral view. D, closeup of dorsal view. E, closeup of frontal view. F, closeup of right lateral view. G, closeup of left lateral view.
FIGURE S2. Rotating illustration (spin around the lateral sides) of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles.
FIGURE S3. Rotating illustration of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles; purple-pink: possible anterior gastric muscles.
FIGURE S4. Rotating illustration of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles; purple-pink: possible anterior gastric muscles; maroon: unidentified structures near interior most portion of the gill region.
