Haa Dhaalu Atoll – officially referred as Thiladhunmathi Dhekunuburi (Southern Thiladhunmathi Atoll) is an administrative division of the Maldives. It is the southern section of Thiladhunmathi Atoll, a natural atoll of the Maldives. This administrative division includes the island of Makunudhoo or Maamakunudhoo (Malcolm Atoll in the Admiralty Charts) with its large reef, as well as the southern part of the larger Thiladhunmathi or Tiladummati Atoll. Thiladhunmathi was divided into its northern and southern divisions on May 21, 1958.