Gomphidia undetermined

Zenodo (CERN European Organization for Nuclear Research)

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.

Authors 7

1. Rory A. Dow Aachen Institute of Biodiversity and Environmental Conservation

   Naturalis Biodiversity Center · Universiti Malaysia Sarawak

   Affiliation as printed

   Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia. & Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, The Netherlands

2. Novia Gesriantuti

   Universitas Muhammadiyah Riau

   Affiliation as printed

   Program Studi Biologi Fakultas MIPA Dan Kesehatan, Universitas Muhammadiyah Riau, Indonesia

3. Muhammad Iqbal

   Riau University

   Affiliation as printed

   Restorasi Ekosistem Riau, Pangkalan Kerinci

4. Pungki Lupiyan-Ingdyah

   Brigham Young University · National Research and Innovation Agency

   Affiliation as printed

   Research Center for Biosystematics and Evolution, National Research and Innovation Agency (BRIN), Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia. & Department of Biology, Brigham Young University, Provo, UT 84602, USA

5. JOHN F. PERIERA
   Affiliation as printed

   Restorasi Ekosistem Riau, Pangkalan Kerinci, Riau

6. Shinta O. Zulya

   Universitas Muhammadiyah Riau

   Affiliation as printed

   Program Studi Biologi Fakultas MIPA Dan Kesehatan, Universitas Muhammadiyah Riau, Indonesia

7. Bradford M. Sanders
   Affiliation as printed

   Restorasi Ekosistem Riau, Pangkalan Kerinci, Riau