Species checklist of Orthoptera in the Forest Area with Special Purpose (KHDTK) Aek Nauli, North Sumatra

We present the species checklist of Orthoptera in the Forest Area with Special Purpose/KHDTK Aek Nauli, Simalungun Regency, North Sumatra, Indonesia. The checklist is provided as a basic information on the grasshopper diversity and species assemblage in the forest region. KHDTK Aek Nauli is classified into a tropical montane forest with an elevation of 1,100–1,750 m a.s.l dominated by the pine species and intended as an ex situ conservation for Sumatran Elephant (Elephas maximus sumatranus). Sampling of grasshoppers was conducted for four consecutive days using two methods namely pit fall trap and sweeping net with a total of 12 sampling points. Approximately of 21 orthopteran species from 97 individuals belonging to suborder Ensifera (12 species) and suborder Caelifera (9 species) were documented. The highest Importance Value Index (IVI) orthopteran species was obtained from Paratettix curtipennis (102.92), followed by Teleogryllus emma (79.04), Oxya intricata (69.67), and etc. All grasshoppers were commonly identified for Asiatic region to worldwide distribution.