Sungaya dumagat is a stick insect species from the family of Heteropterygidae native to the Philippine island of Luzon.

The beak-shaped secondary ovipositor at the end of the abdomen, which is typical for species of the Obriminae, is formed ventrally from the eighth sternum, also called the subgenital plate.

Another specimen from the collection of Thies H. Büscher was found in April 2013 by local collectors in the eastern neighboring province of Quirino in the Sierra Madre mountains.

The specimen, originally from Hennemann's collection, was deposited as holotype in the Museum of Natural Sciences in Brussels.

It was collected by Ismael O. Lumawig in July 1996 in Balite in the municipality of Aritao at an altitude of about 1,100 metres (3,600 ft).