Keywords: Triceratops prorsus old skull001.png Triceratops prorsus - skull Triceratops_prorsus_old jpg 2010-10-12 13 31 UTC Triceratops_prorsus_old jpg O C Marsh derivative work <font color blue >M</font><font color black >ath</font><font color green >K</font><font color black >night</font> Triceratops prorsus old skull002 png isolated skull MathKnight Triceratops_prorsus_old jpg PD-old Original upload log This image is a derivative work of the following images File Triceratops_prorsus_old jpg licensed with PD-old 2008-07-06T17 20 07Z FunkMonk 2203x1028 272977 Bytes <nowiki> </nowiki> 2007-10-28T18 06 37Z DiBgd 1500x661 152773 Bytes <nowiki> Triceratops prorsus Zittel 1913 1913 O C Marsh </nowiki> Uploaded with derivativeFX Dinosauria skeletal diagrams Othniel Charles Marsh Triceratops skulls Triceratops on white background |