"Desmatosuchus" chamaensis was named in 2003 and found from the Petrified Forest Member of the Chinle Formation in New Mexico.

[1][2] It was suggested to be more closely related to Paratypothorax, and so Parker gave it the name Heliocanthus.

chamaensis from Desmatosuchus, but the name Heliocanthus remained a nomen nudum until 2007, where it was thoroughly rediscribed in a paper published by the Journal of Systematic Palaeontology.

[5] An article published later in 2007 in the science blog Tetrapod Zoology brought these events to the attention of a wider range of readers, and the controversy was dubbed "Aetogate".

[6] This sparked continued debate regarding these issues among vertebrate paleontologists, which eventually led to an investigation by the Society of Vertebrate Paleontology into these issues and a response given in mid 2008 regarding the unethical conduct of the authors who described Rioarribasuchus.