Abstract
Schilleria utahensis Evans and Chure, 1999 was erected for an associated partial skeleton of an enigmatic fossil lizard recovered from the Late Jurassic Brushy Basin Member of the Morrison Formation at Dinosaur National Monument in northeastern Utah (Evans and Chure 1999). However, the genus name Schilleria is a junior homonym of the arachnid subgenus Schilleria Dahl, 1907. Under Article 23.1 of the International Code of Zoological Nomenclature (ICZN 1999) Dahl’s 1907 name has priority. Another junior homonym is Schilleria Girault, 1932 (a genus of Australian chalcidoidean hymentopteran), which was replaced by Ghesquiere (1946) with Schilleriella because of the preoccupation by Dahl (1907).