THE SUBTERRANEAN SPECIES Niphargus zagrebenis S. KAR. 1950 (FAM. NIPHARGIDAE) ON BALKAN (CONTRIBUTION TO THE KNOWLEDGE OF THE AMPHIPODA 312)

The body length of examined specimens was measured by tracing individual's midtrunk lengths (tip of the rostrum to end of the telson) and drawings were made using a camera lucida attachment and manually inked. Some morphological terminology and setae formulae follow G. Karaman's terminology (Karaman, G., 1969; 2012) for palpus article 3 of mandible [Asetae= setae on outer face of article; B-setae= setae on inner face of article; Dsetae= short setae along lateral margin of article; E-setae= long setae at distal part of article], as well as for distal corner of propodus of gnathopods 1 and 2 [Sspine= corner palmar spine on outer face; L-spines= slender serrate spines sitting near S-spine on outer face; M-setae= row of long facial corner submarginal setae on outer face; R-spine= subcorner spine on inner face]. Antenna 2: peduncular article 3 short, at distoventral corner with bunch of setae slightly longer than article itself (fig. 1D); article 4 longer than article 5 (ratio: 69:61), along ventral margin with 3 bunches of setae (the longest setae slightly exceeding diameter of article itself), along dorsal margin with one median spine and 4 bunches of short setae; article 5 along ventral margin with 3 bunches of setae (the longest setae are rather longer than diameter of article itself), along dorsal margin with 4 bunches of short setae. Maxilla 1: inner plate with 3 setae; outer plate with 7 spines (6 spines with one lateral tooth; one spine with finely serrate margin and one tooth) (fig. 2G); palpus 2-articulated, not reaching distal tip of outer plate spines (fig. 2F), provided with 6 distal setae.