mastodon mandible vcu 3d 4142 - model virtual curation lab virtualcurationlab 45b2e61 mammut americanum 3-d scanned go scan50 scanner december 10 2018 academy natural sciences philadelphia repository specimen number ansp 13102 recovered big bone lick kentucky william clark 1807 thomas jefferson originally describes holotype new species jeffersonii courtesy virginia commonwealth university seed grant supported research trip made scanning effort possible