Abstract
Two new species of the genus Gammarus are described and illustrated from Northwest China. A new species name Gammarus tianshan nom. nov. is proposed to replace G. montanus Hou et al., 2004. Gammarus simplex sp. nov. from Altay, Xinjiang, is characterized by uropod III with simple setae on both rami and urosomite I only with setae on dorsal margin. Gammarus glaber sp. nov. from Qinghai, is characterized by uropod III with few simple and plumose setae. Detailed morphological description and differences from related species are discussed. A distribution map of the new species and related species is provided.
References
Fabricius, J.C. (1775) Systema Entomologiae, Sistens Insectorum Classes, Ordines, Genera Species Adiectis Synonymis, Locis, Descritionibus, Observationibus. In Officina Libraria Kortii, Flensbergi et Lipsiae, 832 pp.
Holsinger, J.R. (1967) Systematics, speciation, and distribution of the subterranean amphipod genus Stygonectes (Gammaridae). Bulletin of United States National Museum, 259, 1–176.
https://doi.org/10.5479/si.03629236.259.1Hou, Z., Li, S. & Platvoet, D. (2004) Three new species of the genus Gammarus from tributaries of the Ili River, China (Crustacea, Amphipoda, Gammeridae). Revue Suisse de Zoologie, 111, 257–284.
https://doi.org/10.5962/bhl.part.80238Hou, Z., Li, J. & Li, S. (2013) Ten new Gammarus species (Crustacea: Amphipoda: Gammaridae) from Yunnan-Guizhou Plateau, China. Zootaxa, 3687 (1), 1–95.
https://doi.org/10.11646/zootaxa.3687.1.1Hou, Z., Sket, B., Fiser, C. & Li, S. (2011) Eocene habitat shift from saline to freshwater promoted Tethyan amphipod diversification. Proceedings of the National Academy of Sciences of the United States of America, 108, 14533–14538.
https://doi.org/10.1073/pnas.1104636108
Hou, Z., Sket, B. & Li, S. (2014) Phylogenetic analyses of Gammaridae crustacean reveal different diversification patterns among sister lineages in the Tethyan region. Cladistics, 30, 352–365.
https://doi.org/10.1111/cla.12055
Karaman, G.S. (1977) Contribution to the knowledege of the Amphipoda 90. Revision of Gammarus balcanicus Schäf. 1922 in Yugoslavia (fam. Gammaridae). Poljoprivreda i Sumarstvo, 4, 37–60.
Karaman, G.S. & Pinkster, S. (1987) Freshwater Gammarus species from Europe, North Africa and adjacent regions of Asia (Crustacea-Amphipoda). Part III. Gammarus balcanicus-group and related species. Bijdragen tot de Dierkunde, 57, 207–260.
Leach, W.E. (1814) Crustaceology. The Edinburgh Encyclopaedia, 7, 402–403.
Linnaeus, C. (1758) Systema Naturae. Editio Decima, Tomus I. Laurentii Salvii, Holmiae [Stockholm], 824pp.
Mamos, T., Wattier, R., Burzynski, A. & Grabowski, M. (2016) The legacy of a vanished sea: a high level of diversification within a European freshwater amphipod species complex driven by 15 My of Paratethys regression. Molecular Ecology, 25, 795–810.
https://doi.org/10.1111/mec.13499
Meng, K., Hou, Z. & Li, S. (2003) A new species from Xinjiang, China (Crustacea, Amphipoda, Gammaridae). Acta Zootaxonomica Sinica, 28 (4), 621–628.
Sars, G.O. (1863) Beretning om en i Sommeren 1862 foretagen zoologisk Reise i Christianias og Trondhjems Stifter. Nyt Magazin for Naturvidenskaberne (Oslo), 12 (3), 193–252.
Schäferna, K. (1922) Amphipoda balcanica, with notes about other freshwater Amphipoda. Vestnik Kralovske Ceske Spolecnosti Nauk, 1921–22 (12), 1–111.
Väinölä, R., Witt, J.D.S., Grabowski, M., Bradbury, J.H., Jazdzewski, K. & Sket, B. (2008) Global diversity of amphipods (Amphipoda; Crustacea) in freshwater. Hydrobiologia, 595, 241–255.
https://doi.org/10.1007/s10750-007-9020-6