Asked if he wrote under the pseudonym Brock Landers, Quayle told ABCNews.com emphatically: "I am not Brock Landers."
He added that he knew the site's founder, Nik Richie, but his only involvement has been to refer him to an intellectual property attorney when he launched DirtyScottsdale.com.
Richie, whose legal name is Hooman Karamian, did not immediately respond for comment, but suggested several times in posts on thedirty.com that Quayle is Brock Landers.
"I have kept it a secret until right now ... the mystery man is Ben Quayle aka Brock Landers, the son of Vice President Dan Quayle," Richie wrote on Monday. "If you are a DIRTY ARMY Republican, vote for Ben Quayle because he was one of the original creators of DirtyScottsdale.com which evolved into TheDirty.com."
On Wednesday, Richie denied that he had been pressured by another candidate to reveal Quayle's involvement, writing, "Just to make this clear to all media: I have zero ties with any of Ben Quayle's opponents."
Thedirty.com reposted one of Landers' columns from the defunct original site. On May 30, 2007, Landers wrote of one Scottsdale woman: "Truth be told, I'm more of a brunette guy, so blonds have to be all the more stunning to gain my attention and admiration. That being said, this lady definitely passed the rigorous requirements that this site sets forth, and she is definitely foxy."
Quayle recently came under pressure for another ad emphasizing family values that depicted him playing with two little girls. His opponents and the media were quick to point out that Quayle had no children and accused him of renting a family. Things looked bad when a campaign spokesman told a reporter they were "just terribly cute kids," but two days later Quayle pushed back with a reasonable answer: The children were his nieces.
"To call my nieces a rent-a-family is pretty obnoxious," he told a local news station. "They are my family. They're my extended family."
The first piece of legislation Quayle said he would propose if elected to Congress would be a budget-slashing initiative he calls the 20/15 solution.
For every year the budget is not cut by 20 percent, Quayle proposes, executive and legislative branch politicians and bureaucrats will take a 15 percent pay cut.
"Everyone across America is tightening their belts," he said. "The only place it hasn't happened is D.C."