19th-century ichnology
... that highlights from 19th-century ichnology include the discovery of protomammal tracks in England, dinosaur footprints in Massachusetts, and the mysterious hand-shaped Chirotherium tracks ?
... that highlights from <b id="mwCE8"><a href="./19th_century_in_ichnology" id="mwCFA" rel="mw:WikiLink" title="19th century in ichnology">19th-century ichnology</a></b> include the discovery of <a href="./Chelichnus" id="mwCFE" rel="mw:WikiLink" title="Chelichnus">protomammal tracks</a> in England, <a class="mw-redirect" href="./Dinosaur_footprints" id="mwCFI" rel="mw:WikiLink" title="Dinosaur footprints">dinosaur footprints</a> <a href="./Connecticut_River_Valley_trackways" id="mwCFM" rel="mw:WikiLink" title="Connecticut River Valley trackways">in Massachusetts</a>, and the mysterious hand-shaped <i id="mwCFQ"><a href="./Chirotherium" id="mwCFU" rel="mw:WikiLink" title="Chirotherium">Chirotherium</a></i> tracks <i id="mwCFY">(pictured)</i>?