Oppiella (Perspicuoppia) turcica sp. nov.

Measurements [n= 4]. Body length: 272–296 (holotype: 296) μm, body width: 124 –142 (holotype: 130) μm. Prodorsum (Figs. 10 A, 11, 12). Rostrum nasute; with a broadly rounded protuberance in the middle. Rostral setae (ro) barbed, 25 μm in length. Lamellar setae (le) barbed, 20 μm in length. Costulae present, reaching to near origin of lamellar setae. Interlamellar setae (in) barbed, 18 μm in length, situated next to a pair of crest in the interbothridial region. Distance between the setae le and in two times longer than that between the setae ro and le. Exobothridial setae (ex) smooth. Bothridia round. Sensilli (ss) fusiform, with well developed heads, bearing medium long cilia unilaterally.

Notogaster (Figs. 10 A and C, 12A and B). Elongate oval, its anterior margin with two pairs of round humeral processes. Ten pairs of notogastral setae smooth, setae c2 well developed, on lateral sides of cristae, with two cilia.

Ventral side (Fig. 10 B): Posterior margin of coxisternal region with a row of rounded teeth. Pedotectum I (pdI) sharpened. Prodorsum widest at pdI level. Epimeral borders distinctly visible and strongly sclerotized. Epimeral setal formula 3-1-3-3, setae thin and smooth, mostly 4–5 µm, setae 3c slightly longer (ca. 11 µm). Genital plates 28 μm in length, 32 μm in width, with five pairs of setae, all of them smooth. Anal plates 50 μm in length, 44 μm in width, with two pairs of setae. Distance between genital and anal plates 60 μm. One pair of aggenital and three pairs of adanal setae. Adanal setae ad 1 in postanal, ad 2 in paraanal and ad 3 in preanal positions.

Legs. Formula of setae and solenidia on leg segments (trochanter to tarsus): I (1-5-2+1-4+2-21+2); II (1- 5-2+1-4+1-13+2); III (2-3-1+1-3+1-12); IV (1-2-2-3+1-10). Structure and setation of legs as shown in figures 13 and 14.

Material examined: Holotype and 2 paratypes collected from litter and soil under Juniperus oxycedrus, Ardanuç, Artvin, Turkey, 1200 m, 18 Oct. 1992; 3 paratypes collected from the decaying bark and moss, Ardanuç, Artvin, Turkey, 1200 m, 18 Oct. 1992.

Etymology. The name of new species refers to the type locality, Turkey.

Remarks. Until now, only three species of the subgenus Oppiella (Perspicuoppia) have been described, namely Oppiella (Perspicuoppia) perspicua (Mihelčič, 1956) from Spain, Caucasus and Crimea, Oppiella (Perspicuoppia) minidentata (Subías, 1977) from Spain, Caucasus, Crimea and Finland, and Oppiella (Perspicuoppia) rara Ivan & Vasiliu, 1997 from Romania (Mihelčič 1956; Woas 1986; Subías & Balogh 1989; Ivan & Vasiliu 1997; Niemi et al. 1997; Subías & Arillo 2001; Subías 2004, 2007). The new species is easily distinguishable from all known species of the subgenus by the nasute rostrum, rounded humeral processes of notogaster, the shape of the costulae and the barbed prodorsal setae except the setae ex.