The difference between Rhinoceros lasiotis (with ear fingers) and Rhinoceros sumatrensis figured by Sclater in 1876.
Date 1876
Source ROOKMAAKER, L. C. (1984). The taxonomic history of the recent forms of sumatran rhinoceros (Dicerorhinus sumatrensis). Journal of the malayan Branch of the Royal Asiatic Society 57 (1): 12-25.
Author Philip Lutley Sclater
Source: https://commons.wikimedia.org/wiki/File:Dicerorhinus_Sclater_1876.jpg

The Sumatran rhinoceros, hairy rhinoceros or Asian two-horned rhinoceros (Dicerorhinus sumatrensis), is a rare member of the family Rhinocerotidae. Dicerorhinus sumatrensis is only found in Sumatra and Borneo.