Gammarus baloutchi Khalaji-Pirbalouty & Sari, 2006

Gammarus baloutchi Khalaji-Pirbalouty & Sari, 2006: 91 –99, Figs. 1 –4.

Locus typicus. Atashgahe Lordegan fall, Chaharmahal Va Bakhteyari Province (31º14'N, 51º00'E).

Material examined. Holotype, 8 August 2001 (ZUTC Amph. 2070); paratypes, (ZMA Crust. Amph. 204658).

Distribution. Endemic species with the only known record from a waterfall in central Zagros (Fig. 1).

Ecologic notes. The species lives in high mountains of ca. 2100 m asl. It was found under aquatic vegetation and in a gravel bed (Khalaji-Pirbalouty & Sari, 2006).

Taxonomic remarks. Among Iranian Gammarus species, the short endopodite of uropod 3 can only be observed in G. baloutchi, G. l o b i f e r, and G. sepidannus . The first species can be distinguished from G. lobifer by the lack of the sub-angular setae on basis of pereopod 7 (Khalaji-Pirbalouty and Sari, 2006, Fig. 3), shorter antennal gland cone, and longer setation of peduncle segments of antenna 2 (ibid. Fig. 1). From G. sepidannus it differs by having a long eye, less setose flagellum of antenna 2, and shorter antennal gland cone (ibid. Fig. 1).