Gomphidia undetermined
Year: 2025
Type: other
Abstract: Gomphidia sp. Remarks. A single male Gomphidia was seen perched at the side of a closed canopy PSF stream (Simpang Sianyir, M 1m) during suboptimal weather conditions on 1 x 2023, but flew away before the boat could be brought into a position from which capture was possible. The individual was very darkly coloured, more so than is typical for any species of Gomphidia known from Sundaland. Two species of Gomphidia have been recorded from Sumatra— G. abbotti Williamson, 1907 and G. machlachlani Selys, 1873 (but see below)—both of these species have been recorded in low pH waters elsewhere (e.g. Dow et al. (2012) for G. abbotti and Dow & Reels (2024) for G. machlachlani) but G. abbotti can be ruled out by the coloration of the Simpang Sianyir male. Gomphidia machlachlani is darker than G. abbotti and although still not typically as dark as the Simpang Sianyir male, the first author has collected one male almost as dark as that individual in Sarawak. Moreover, G. machlachlani has been found in numbers in very similar conditions at Maludam National Park in Sarawak (Dow & Reels 2024). Although the Simpang Sianyir male might be G. machlachlani, Lieftinck (1954) questioned the identity of Sumatran material supposedly of that species. Specimens will need to be collected before identification to species can be made. Whichever species of Gomphidia is present in the Kampar Peninsula, the genus has not been recorded in Riau Province until now.
Subfield: Ecology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7125390657
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