Scientists recently discovered a new species of click beetle, named Lissomus arawak, in the cloud forests of the Dominican Republic, adding to the region’s biodiversity. The beetle, which features a glossy black body and pale-yellow antennal segments, was found during targeted research that began in 2021 to catalog the insects of the country.
Discovery in the Cloud Forests
Researcher Paul J. Johnson from South Dakota State University and Jiri Hodecek from SHIFT (CURML) in Lausanne identified the new species during their expeditions in montane broadleaf habitats located at elevations between 600 and 700 meters, particularly around the Sierra de Bahoruco and the Cordillera Septentrional. This discovery marks the third species in the genus Lissomus recorded on the island and in the Greater Antilles, indicating a potential complex colonization history.
Researchers suggest, based on the beetle’s structural similarities to Central and northern South American species, that it may have originated from multiple colonization events rather than a single one. They caution that this notion remains a hypothesis.
All five specimens collected, which were the only ones identified between 1985 and 2024, were female. The researchers expressed confidence in the unique morphological characteristics of L. arawak, despite the small sample size.
Named in honor of the Arawak, the Indigenous people of the region, the beetle’s designation reflects the intertwining of biological and cultural histories in the Antilles. The researchers noted, “We wanted the name of this distinctive endemic species to connect the biological history of the island with its human history.”
Ongoing Biodiversity Initiatives
The initiative to document insect diversity in the Dominican Republic is vital, as the region is characterized by high habitat modification and land-use changes. So far, the project has led to the discovery of nearly 20 new species across various insect orders, such as dermestids, longhorned beetles, and ichneumonid wasps. Researchers estimate that at least 15 additional click beetle species may still be awaiting discovery in the Dominican Republic.
This ongoing work aims to catalog the rich yet understudied insect diversity of the region before ongoing habitat loss threatens even more species. As the scientists continue their field expeditions, the discoveries not only enhance the understanding of the Dominican Republic’s fauna but also stress the importance of preserving these crucial habitats.
