Philadelphia Media Network, parent company of The Inquirer, the Philadelphia Daily News, and, plans to lay off 46 members of Newspaper Guild Local 10 in December, 10.5 percent of the membership, the union said Monday.

PMN confirmed that it had sent a memo to the Guild saying that "approximately 46 members would be impacted" as part of a planned consolidation of the three newsrooms announced Friday by publisher and CEO Terrance C.Z. Egger.

Additional cutbacks are expected among management and in areas outside the newsrooms, Egger said Monday.

Egger has told employees that PMN needs to reorganize the newsrooms to gain efficiencies and save from $5 million to $6 million companywide to be self-sustaining, with revenues exceeding expenses.

Details on which newsroom departments would be affected were not immediately available. Guild leaders said they expected to learn more Wednesday.

Keith Black, PMN's vice president of human resources, said in an email that the company planned to meet with Guild officials at 1 p.m. Wednesday. He said the layoffs would occur on or after Dec. 4.

"No final decisions as to exactly which employees will be impacted can be made until after that meeting and after we have resolved any issues that may be raised by the Guild," Black said.

The union's contract with PMN requires that layoffs go by seniority. There is a provision in the contract that allows managers to protect 25 percent of the newest employees whom they deem essential to the company's mission.

The Guild, which has 436 members, represents newsroom employees as well as workers in advertising, circulation, and finance.

On Monday, Egger sent a three-page email to employees laying out his economic and strategic plan.

"This is obviously a challenging time for our organization and the industry as a whole," he said in the email.

In response to a reporter's question, Egger said in a separate email that "management reductions will occur, but are not part of the 46."

He added, "All plans are being finalized, but per our contract we wanted to formally notify the Guild as soon as possible."