Distribution of Ecnomus McLachlan, 1864 (Trichoptera, Ecnomidae) from the Lower Mekong River with a description of Ecnomusstungtrengensis new species

Pongsak Laudee; Hans Malicky; Kriengkrai Seetapan; Penkhae Thamsaenanupap; Supawit Karnkasem; Chanda Vongsombath; Sai Sein Lin Oo; Chamroeun Kong; Pome Zalyan; John C Morse

doi:10.3897/BDJ.10.e94936

Distribution of Ecnomus McLachlan, 1864 (Trichoptera, Ecnomidae) from the Lower Mekong River with a description of Ecnomusstungtrengensis new species

Biodivers Data J. 2022 Dec 1:10:e94936. doi: 10.3897/BDJ.10.e94936. eCollection 2022.

Authors

Affiliations

¹ Faculty of Innovative Agriculture and Fishery Establishment Project, Prince of Songkla University, Surat Thani Campus, Surat Thani, Thailand Faculty of Innovative Agriculture and Fishery Establishment Project, Prince of Songkla University, Surat Thani Campus Surat Thani Thailand.
² Sonnengasse 13, Lunz am See, Austria Sonnengasse 13 Lunz am See Austria.
³ School of Agriculture and Natural Resources, University of Phayao, Phayao, Thailand School of Agriculture and Natural Resources, University of Phayao Phayao Thailand.
⁴ Faculty of Environment and Resource Studies, Mahasarakham University, Maha Sarakham, Thailand Faculty of Environment and Resource Studies, Mahasarakham University Maha Sarakham Thailand.
⁵ Faculty of Environmental Sciences, National University of Laos, Dong Dok Campus, Vientiane, Laos Faculty of Environmental Sciences, National University of Laos, Dong Dok Campus Vientiane Laos.
⁶ No.208, Southern Quarter, Muse Township, Shan State, Myanmar No.208, Southern Quarter Muse Township, Shan State Myanmar.
⁷ Kampong Speu Institute of Technology, Kampong Speu, Cambodia Kampong Speu Institute of Technology Kampong Speu Cambodia.
⁸ Department of Zoology, University of Kalay, Myanmar, Kalay, Myanmar Department of Zoology, University of Kalay, Myanmar Kalay Myanmar.
⁹ Clemson University, Clemson, United States of America Clemson University Clemson United States of America.

Abstract

Background: Trichoptera were surveyed from four different physiographic regions of the Lower Mekong River, including the Northern Highlands, the Khorat Plateau, the Tonle Sap Basin and the Mekong Delta in Myanmar, Laos, Thailand, Cambodia and Vietnam.

New information: Twenty-three species of the genus Ecnomus, including a new species, were identified and mapped. Ecnomusmammus Malicky & Chantaramongkol, 1993 is a common species which is found from Tonle Sab Basin and Mekong Delta. Ecnomusalkmene Malicky & Chantaramongkol, 1997, E.volovicus Malicky & Chantaramongkol, 1993 and Ecnomusquordaio Malicky, 1993 are the common species in the area of the Northern Highlands and the Khorat Plateau. Ecnomusplotin Malicky & Laudee 2010 is found in the Mekong Delta. Ecnomustriangularis Sun, 1997 is a new species record for Southeast Asia. In addition, E.stungtrengensis sp. n. is described and illustrated. The male genitalia of E.stungtrengensis sp. n. are clearly different from those of other species in the genus Ecnomus by the shape of superior appendages which are slender and bent downwards distally in lateral view.

Keywords: Southeast Asia; aquatic insects; biodiversity; caddisflies; the Mekong River.

Pongsak Laudee, Hans Malicky, Kriengkrai Seetapan, Penkhae Thamsaenanupap, Supawit Karnkasem, Chanda Vongsombath, Sai Sein Lin Oo, Chamroeun Kong, Pome Zalyan, John C. Morse.