NEW PROTEROTHERIIDS (LITOPTERNA, MAMMALIA) FROM THE MIDDLE MIOCENE OF QUEBRADA HONDA, BOLIVIA, AND TRENDS IN DIVERSITY AND BODY SIZE OF PROTEROTHERIID AND MACRAUCHENIID LITOPTERNS. AMGH. 2020;57(2):159-188. doi:10.5710/AMGH.03.03.2020.3268