INVESTIGATIONS ON TWO SUBTERRANEAN SPECIES OF THE FAMILY NIPHARGIDAE (GAMMARIDEA) FROM SERBIA, NIPHARGUS REMYI S. KAR. 1934 AND N. EUSERBICUS, SP. N. (CONTRIBUTION TO THE KNOWLEDGE OF THE AMPHIPODA 266)

Two members of the subterranean family Niphargidae (Amphipoda, Gammaridea) from Serbia are studied: Niphargus remyi Karaman, S., 1934, and Niphargus euserbicus, new species. The species N. remyi was described relatively briefly by Stanko Karaman (1934) based on the specimens collected by Dr. Paul. Remy from Nancy, France, in the springs Čedovo near Sjenica (Serbia). Although the original material was dried, we redescribed more in detail this species based on holotype and paratypes existing in the KARAMAN`s Collection in Podgorica, Crna Gora (Montenegro). The subterranean species Niphargus euserbicus, new species, is described here from the cave Jovanjska pečina near Valjevo (Serbia), based on specimens collected by Dr. Ivo Karaman from Novi Sad, Serbia. The both species belong to the Niphargus remyi-ravanicanus complex of taxa, and its taxonomic position within this group of species is discussed. As the males and females of all species within this Complex are partially unknown, the presented taxonomic relations among all known taxa of this complex are probably not definitive.