ITANAGAR, Apr 3: In a significant scientific breakthrough, researchers from Rajiv Gandhi University, in collaboration with the University of Tübingen, have discovered three new species of rove beetles from Arunachal Pradesh.
The newly identified species—Megalopinus arunachalensis, Megalopinus mithun, and Megalopinus micros—were documented during an extensive expedition conducted between December 2024 and March 2025. The research team included Tobias Mainda, Hiren Gogoi, Tagam Dobiam, Sonu Singh, and Oliver Betz.
The expedition was led by Prof Dr Oliver Betz and hosted by Dr Hiren Gogoi. In addition to the new discoveries, the team also reported new regional records of Megalopinus helferi and Megalopinus nepalensis.
The findings have been published in the scientific journal Soil Organisms, highlighting the rich yet underexplored insect biodiversity of Northeast India.
Belonging to the genus Megalopinus, these beetles are typically found in moist forest habitats such as decaying wood and fungal leaf litter. Notably, Megalopinus micros is among the smallest in the genus, measuring just about 1.9 mm in length.
The species names reflect local and regional significance—‘arunachalensis’ honours Arunachal Pradesh, ‘mithun’ refers to the semi-domesticated bovine Bos frontalis (Mithun), and ‘micros’ denotes its exceptionally small size.
Specimens were collected from biodiversity-rich locations including Eaglenest Wildlife Sanctuary, Pakke Tiger Reserve, Menchukha valley, and Aalo Forest Division using methods such as sifting moist leaf litter and examining decaying logs.
The study underscores the ecological importance of conserving forest microhabitats like decaying wood and leaf litter, which support a wide array of lesser-known organisms.
The research was supported by the German Research Foundation and carried out under a formal collaboration between the participating institutions. Necessary approvals were obtained from the National Biodiversity Authority and the Arunachal Pradesh Department of Environment, Forest & Climate Change, along with permissions from the State Home Department.
The researchers also acknowledged the crucial support of local communities and indigenous tribes of Arunachal Pradesh, whose cooperation and traditional knowledge greatly contributed to the success of the study.