Wikipedia
Henkelodon
Henkelodon was a small mammal of the Upper Jurassic. It was a relatively early member of the extinct order Multituberculata. Henkelodon was a European herbivore that lived during the "age of the dinosaurs". It lies within the suborder " Plagiaulacida" and family Paulchoffatiidae.
The genus Henkelodon ("Henkel's tooth") was named by Hahn G. in 1977 based on a single species.
Fossil remains of the species Henkelodon naias were discovered in the Kimmeridgian (Upper Jurassic)-age strata of Guimarota, Portugal. The remains consisted of one upper jaw. According to Kielan-Jaworowska and Hurum, 2001, (p.413), this genus was named in 1987. However, Hahn and Hahn 2000 (p.105) supports 1977.