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Issue: Vol. 5636 No. 3: 19 May 2025
Type: Article
Published: 2025-05-19
DOI: 10.11646/zootaxa.5636.3.5
Page range: 499-510
Abstract views: 56
PDF downloaded: 3

On the taxonomy and distribution of Diamesa gregsoni Edwards, (Diptera: Chironomidae: Diamesinae), with morphological redescription and DNA barcoding of species from the Far East

Federal Scientific Center of the East Asia Terrestrial Biodiversity; Far East Branch of the Russian Academy of Sciences; 100 let Vladivostoku 159; 690022 Vladivostok; Russia; Far Eastern Federal University; Institute of the World Ocean; 10 Ajax Bay; Russky Island; 690922 Vladivostok; Russia
Federal Scientific Center of the East Asia Terrestrial Biodiversity; Far East Branch of the Russian Academy of Sciences; 100 let Vladivostoku 159; 690022 Vladivostok; Russia
Diptera Chironomidae Diamesinae Diamesa gregsoni redescription DNA barcoding Far East

Abstract

By analyzing the DNA barcoding data of the Diamesa gregsoni Edwards syntype, we carried out a genetic study of this species from the Far East and made a comparison with DNA barcodes of North American populations. A morphological redescription of the adult male and a description of the pupa and larva are given, and the taxonomy and distribution of the species are clarified in this study. The Bayesian tree revealed two well-supported clades of D. gregsoni from Nearctic and Palaearctic. The average K2P genetic divergence between these clades was 1.67%, which corresponds to intraspecific differences. Overall intraspecific p-distances within 23 DNA barcodes of D. gregsoni were 1.19%. The Automatic Barcode Gap Discovery (ABGD), Assemble Species by Automatic Partitioning (ASAP), and Multi-rate Poisson tree processes (mPTP) approaches for the species delimitation confirmed that Nearctic and Palaearctic DNA barcodes belong to a single molecular taxonomic unit, while general mixed Yule-coalescent (GMYC) delimit the dataset into three different molecular operational taxonomic units (mOTU).

 

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How to Cite

Semenchenko, A.A. & Makarchenko, E.A. (2025) On the taxonomy and distribution of Diamesa gregsoni Edwards, (Diptera: Chironomidae: Diamesinae), with morphological redescription and DNA barcoding of species from the Far East. Zootaxa, 5636 (3), 499–510. https://doi.org/10.11646/zootaxa.5636.3.5