Annotated list of Pachyrhynchini (Coleoptera, Curculionidae, Entiminae) in Davao City, Mindanao, Philippines

Abstract

Pachyrhynchini is a group of flightless plant-feeding weevils known for their complex and iridescent body ornamentation. It has its center of diversity in the Philippines and this paper presents the first comprehensive record of Pachyrhynchini fauna in Davao City. Data gathering was done through a combination of belt transect, photo documentation, and opportunistic sampling techniques. Materials were collected from trees and shrubs in twelve selected green spaces in Davao City using handpicking and bush beating techniques between 2016 and 2019. A total of 1103 individuals consisting of 32 species and two genera-Pachyrhynchus Germar and Metapocyrtus Heller, were documented. Thirty (30) species (93.75%) are endemic to Mindanao, while fifteen (15) species (46.88%) are considered vulnerable based on Department of Environment and Natural Resources Administrative Order No. 2019-09. The high endemism and the presence of rare species associated with the remaining forest patches call for immediate conservation actions.

Keywords

• Beetles
• conservation
• diversity
• endemic
• jewel w