Under the genus Cnemidophorus, Stebbins (2003) retained xanthonota as a subspecies of A. burti. We also retain xanthonota within burti, pending clarification of its status. It is unclear whether or not the populations of this species around Guaymas (A. burti burti) are conspecific with A. burti stictogrammus (D. Frost pers. comm.). The populations in the south of the range are A. burti griseocaphalus.
âAvengers: Age of Ultronâ star Robert Downey Jr. claims the film will be a big turning point for his character Tony Stark. In an interview with Marvel.com, Downey Jr. explained how removing the ARC Reactor from his chest in the end of the third âIron Manâ film has changed Starkâs perspective on the world.
For the 2015 superhero film, see Avengers: Age of Ultron.  Age of Ultron  (abbreviated AU) is a 2013 comic book fictional crossover storyline published by Marvel Comics that involved the conquest of the Earth by the sentient robot tyrant Ultron.n July 20, 2013, Joss Whedon and Marvel Studios announced at the San Diego Comic-Con International that the sequel to the 2012 film The Avengers will be titled Avengers: Age of Ultron and feature Ultron as the villain. Whedon also stated that the story will be original and not an adaptation of this storyline.