"We thank our United States counterparts and the citizens of Lanao Del Sur for helping us neutralize the last remaining leader of the Maute-ISIS Group in the person of Abu Dar".
Colonel Romeo Brawner, commander of the Army's 103rd Brigade said: "Positive ang DNA result".
Believed to be killed was Owayda Benito Marohombsar, also known as Abu Dar, who was suspected by the military intelligence officials to be the emir of the Islamic State (IS) in Southeast Asia.
A Philippine police profile said Marohombsar was reported to have undergone military and explosives training in Afghanistan in 2005 and returned to the south a few years later and established an armed group called the Khilafa Islamiyyah Mindanao.
"We are hopeful that the death of Abu Dar would finally put an end to the DI Lanao", he added. "Well, for now his group is leaderless", Lorenzana said in a text message, adding that the agency is "monitoring who will replace Dar".
"Confirmed. It's Dar's remains", Lorenzana said.
The military earlier expressed belief that one of the four Dawla Islamiya - Lanao terrorists killed in the Lanao del Sur encounter a month ago was Dar.
It was hard to determine Marohombsar's identity by face because one of the bodies "was deformed", Brawner said.
Scene of the Crime Operatives (SOCO) took a nail sample from the body which was compared to the DNA of his family or relatives.
Philippine President Rodrigo Duterte placed the country's south under martial law to bolster efforts by troops to eradicate militants who survived the Marawi fighting and go after their allied groups in other southern provinces like the brutal Abu Sayyaf group in Sulu province.