Gammarus lacustris G.O. Sars 1863

• Main Authors: Zamanpoore, Mehrdad, Grabowski, Michal, Poeckl, Manfred, Schiemer, Friedrich
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Gammaridae; Gammarus; Gammarus lacustris; glacier
• Online Access: https://doi.org/10.5281/zenodo.6193340; http://treatment.plazi.org/id/03A387DC093B2859FF31A81BFCEBDE27

Gammarus lacustris G. O. Sars, 1863 Gammarus lacustris G. O. Sars, 1863: 207; Stock, Mirzajani, Vonk, Naderi & Kiabi, 1998: 206. Locus typicus. Selsvand, Vage, Norway (based on the assumption made by Karaman & Pinkster, 1977). Material examined. Karaman & Pinkster, 1977: 32–34, Fig. 12A–D, drawn upon new material from Loch Loyal, Scotland. Additional specimens ( new material ), Ne'ur Lake (38º 02', 48º 36'), Ardebil Province, (FAIC #?). Distribution. Distribution of this species in Iran is restricted to the far north west of the country, a very big population in Ne'ur Lake, and several populations in the west Alborz (Stock et al. , 1998; Alizade-Eghtedar & Sari, 2007) (Fig. 1). Ecological notes. Although inhabiting running waters in some occasions, this species is generally found in stagnant waters and lakes ( e.g. mountain and glacier) with temperatures lower than 20ºC (detailed ecological characteristics in Karaman & Pinkster 1977, p. 34). Taxonomic remarks. Among Iranian gammarids, G. lacustris is most similar to G. pseudosyriacus . However, the latter has an elevated dorsal surface of urosome, compared to not elevated urosome in G. lacustris (Karaman & Pinkster 1977, Fig. 12H). G. bakhteyaricus shows similarities to G. lacustris , from which it differs with the urosome elevation, slender basis of pereopod 7 and, most important, having 2–3 tiny spines on ventral-distal corner of the first peduncle segment in antenna 1. G. lacustris is also similar to G. lordeganensis in having non-setose pereopods 5–7 and antenna 2. However, there are characters well enough for allowing to recognise these species. These include, in the latter species, the acuminate postero-inferior of epimeral plates 2 and 3, non-plumose setae on outer margin of exopodite in uropod 3, and shorter antennal gland cone. Published as part of Zamanpoore, Mehrdad, Grabowski, Michal, Poeckl, Manfred & Schiemer, Friedrich, 2011, Taxonomic review of freshwater Gammarus (Crustacea: Amphipoda) from Iran, pp. 1-14 in Zootaxa ...