A new Gammarus species from Xinjiang Uygur Autonomous Region (China) with a key to Xinjiang freshwater gammarids (Crustacea, Amphipoda, Gammaridae)

Kui Zhang; Jun Wang; Yihao Ge; Jishun Ma; Qiong Zhou

doi:10.3897/zookeys.1090.78834

A new Gammarus species from Xinjiang Uygur Autonomous Region (China) with a key to Xinjiang freshwater gammarids (Crustacea, Amphipoda, Gammaridae)

Zookeys. 2022 Mar 25:1090:129-147. doi: 10.3897/zookeys.1090.78834. eCollection 2022.

Authors

Kui Zhang^{1

2}, Jun Wang¹, Yihao Ge¹, Jishun Ma¹, Qiong Zhou¹

Affiliations

¹ Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/ Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China Huazhong Agricultural University Wuhan China.
² Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, China Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences Wuhan China.

Abstract

A new species of the genus Gammarus Fabricius, 1775 is described and illustrated from Xinjiang Uygur Autonomous Region, China. Gammaruszhouqiongi sp. nov. is characterized by pereopods III-IV with long straight setae on posterior margins; inner ramus of uropod III more than twice as long as peduncle, reaching 0.7 times the length of outer ramus; inner ramus with plumose setae, and outer ramus with both plumose setae and long simple setae. Detailed morphological comparisons with related species are discussed. The K2P distances for each marker (CO1, 16S, 28S, and EF1α) of the new species differ from those of other Gammarus species in Xinjiang. Both phylogenetic trees based on separate (CO1, 16S, 28S, and EF1α) and combined (CO1+16S+28S+EF1α) markers show that the new species is an independent branch. A key to identify Gammarus species in Xinjiang is provided.

Keywords: Amphipoda diversity; Xinjiang; mitochondrial DNA; morphology; new species; nuclear DNA; taxonomy.

Kui Zhang, Jun Wang, Yihao Ge, Jishun Ma, Qiong Zhou.