Spencer G. Lucas and Andrew B. Heckert recognized five biochrons based on the presence of aetosaurs throughout the Chinle Group. The number of biochrons grew to 11 in a 2007 study by Heckert and Lucas along with Adrian P. Hunt and Justin A. Spielmann. These biochrons occurred from the Otischalkian LVF to the Apachean LVF and included genera such as Longosuchus, Tecovasuchus, and Typothorax. "Aetogate" naming controversy In 2007, paleontologists at the New Mexico Museum of Natural History and Science in Albuquerque, New Mexico were accused of plagiarism in some of their published articles dealing with aetosaurs. In December 2006, the genus Rioarribasuchus was erected as a replacement name for "Desmatosuchus" chamaensis in the museum's bulletin. However, four years earlier paleontologist William Parker reassigned "D." chamaensis to the newly named genus Heliocanthus in an unpublished thesis, which was widely disseminated among aetosaur researchers. Because the name was not formally published, it was considered a nomen nudum until January 2007, when Parker's description of Heliocanthus was published in the Journal of Systematic Palaeontology. The authors of the 2006 paper, Spencer G. Lucas, Adrian P. Hunt, and Justin A. Spielmann, were accused of "intellectual theft" by paleontologists Jeff Martz, Mike Taylor, Matt Wedel, and Darren Naish, who claimed that Lucas et al. knew that Parker would eventually redescribe the species and formally erect a new genus. According to Martz, Taylor, Wedel, and Naish, the authors rushed to publish their own name before Parker could publish his. At the time, Lucas, Hunt, and Spielmann were on the editorial board of the NMMNHS bulletin, while Hunt was also the museum director. A coinciding controversy occurred after Spielmann, Hunt, and Lucas published a 2006 paper mentioning that the holotype of Redondasuchus was not a left paramedian, but instead a right one. In 2002, Jeff Martz came to the same conclusion in an unpublished thesis. He, along with Taylor, Wedel, and Naish, claimed that this was another form of plagiarism, as Martz's 2002 thesis was cited by Spielmann et al. (2006), even if his conclusion on Redondasuchus was not mentioned. The allegations were rejected in an internal NMMNHS meeting, reported by Lucas in 2008. They were also brought to the attention of an independent party, the Ethics Education Committee of the Society of Vertebrate Paleontology (SVP) in 2007, and a response was given in 2008. In regard to Redondasuchus, the SVP found no explicit evidence for