Jones Day has asked a judge to sanction the Sanford Heisler Sharp attorneys who are litigating a $200 million gender discrimination lawsuit against the firm, alleging they failed to research their claims.

In a motion filed Friday, Jones Day said Sanford Heisler never bothered to probe the allegations at the core of the lawsuit: that the firm pays female associates less than it pays male associates for equal work. A four-attorney team featuring Beth Heifetz, who heads Jones Day’s issues and appeals practice, and Europe partner-in-charge Mary Ellen Powers wants all claims based on disparate pay shorn from the lawsuit, as well as an order granting fees and costs associated with litigating the motion.