A fossil with fermented grapes in its stomach of an early genus of these animals was found in theMessel Oil Shales. Darwin was astonished to discover a tooth from this extant animal group alongwith fossils of Toxodon, noting that Pliocene conditions must have been very different to cause theirlocal extinction. George Gaylor
A fossil with fermented grapes in its stomach of an early genus of these animals was found in theMessel Oil Shales. Darwin was astonished to discover a tooth from this extant animal group alongwith fossils of Toxodon, noting that Pliocene conditions must have been very different to cause theirlocal extinction. George Gaylord Simpson drew them in a branching evolutionary tree, in contrast totheir erroneous (*) anagenetic portrayal. Gould argued that passive diffusion could explain their trendtoward increased body size; he also described their inaccurate textbook portrayal in "The Case of theCreeping Fox Terrier Clone," which deals with the genus Eohippus. For 10 points, name theseperissodactyls, whose extant species are all members of the genus Equus.
A fossil with fermented grapes in its stomach of an early genus of these animals was found in theMessel Oil Shales.
 horses [accept equids or equines or word forms; accept hippomorphs or word forms; antiprompt on zebras, donkeys, asses, onagers or other specific equines; prompt on less specific taxonomic answers such as perissodactyls; prompt on ungulates or hoofed mammals]