Taxonomic review of freshwater Gammarus (Crustacea: Amphipoda) from Iran Author Zamanpoore, Mehrdad Author Grabowski, Michal Author Poeckl, Manfred Author Schiemer, Friedrich text Zootaxa 2011 3140 1 14 journal article 45727 10.5281/zenodo.205631 d203873a-602b-4c12-9c8f-17c51609cf74 1175-5326 205631 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.