Ramusella (Insculptoppia) pinarbasiensis, Ayyildiz & Toluk & Taskiran, 2010

Ayyildiz, N., Toluk, A. & Taskiran, M., 2010, TWO NEW SPECIES OF OPPIID MITES (ACARI: ORIBATIDA) FROM TURKEY Nusret A, Ay ¸ se T and Mehmet T, Acarologia 50 (1), pp. 13-20 : 14-17

Ramusella (Insculptoppia) pinarbasiensis n. sp.

( Figures 1-3 )

Diagnosis — Rostrum divided by a median incision. Lamellar line present, not reaching to the insertion of lamellar setae, trans-lamellar line faint. Sensilli 40 µm in length, fusiform, with long stalk and their distal half being dilated; 6-7 setae unilaterally, among them proximal setae longer than distal ones.

Dimensions — Length: 200-208 (holotype: 208) µm, width: 114-116 (holotype: 116) µm (n= 4).

Prodorsum ( Figures 1a and 2 ) — Rostrum divided by a median incision. Rostral setae ciliated, 12 µm in length arising on the dorsal surface of rostrum, curved inwards and situated far to each other. Lamellar setae, with one cilium, 10 µm in length and situated closer to inter-lamellar setae than to rostral setae. Lamellar line present, not reaching to the insertion of lamellar setae, trans-lamellar line faint. Inter-lamellar setae minute, 2 µm in length, situated lateral of medial three pairs of muscle sigillae. Bothridia round, with small opening, sensilli (ss) long (40 µm in length), fusiform, with long stalk and their distal half being dilated; 6-7 setae unilaterally, among them proximal setae longer than distal ones.

Notogaster ( Figures 1a and 2a ) — Oval. Longer than wide, ratio 1.3:1. Nine pairs of smooth notogastral setae present. Setae c2 reduced the alveoli. Setae la, lm, and lp about 14, 20, and 32 µm long, respectively. Setae of h series usually about 16 µm long (range 14-20 µm). Setae of p series smaller than other notogastral setae, about 7 µm long (range 6-8 µm).

Ventral side ( Figure 1b ) — Labiogenal articulation smooth. Epimeral borders distinctly visible and strongly sclerotized. Epimeral setal formula 3- 1-3-3, setae thin and smooth, setae 1c and 3c slightly longer 8 and 12 µm in length, respectively. The remaining coxisternal setae 2 µm long. Coxisternal setae 3c, positioned laterally on coxisternal protuberance ventrally at base of pedotectum II. Genital plates 22 µm in length, 26 µm in width, with five pairs of setae, all of them equal in length and smooth. Anal plates 38 µm in length, 32 µm in width, with two pairs of setae, about 6 µm in length, smooth. Distance between genital and anal plates 51 µm. One pair of aggenital and three pairs of adanal setae. Aggenital setae about 6 µm in length, smooth, three pairs of adanal setae ad1-3 smooth, 12, 10 and 8 µm in length, respectively. The adanal setae ad 1 in postanal, ad 2 in paraanal and ad 3 in preanal positions. Lyrifissures iad 10 µm in length, paraanal, anterior of ad2.

Legs — Formula of leg setation (trochanter to tarsus): I (1-5-2+1-4+2-14+1); II (1-5-1+1-3+1-12+2); III (2-3-1+1-3+1-12); IV (1-2-2-3+1-10). Structure and setation of legs as shown in Figure 3 .

Material examined — Holotype ( ZMEU: 249) and five paratypes ( ZMEU: 250-254), one of them were mounted on aluminium stubs and goldcoated for scanning electron microscopy, collected from soil and litter under oak trees, Pinarbasi (38°19’43.18" N, 36°23’28.14" E), Kayseri, Turkey, 1330 m, 23 Apr. 2008.

Etymology — Specific name " pinarbasiensis " is named after the locality, Pinarbasi, Kayseri, Turkey, where the present new species was found.

Remarks — Among the known species of the subgenus Ramusella (Insculptoppia) , Ramusella (Insculptoppia) berninii (PØrez-˝aeigo, 1975), Ramusella (Insculptoppia) corniculata (PØrez-˝aeigo and Peaea, 1997) from Spain and Ramusella (Insculptoppia) cavernalis (Ohkubo and Cokendolpher, 2002) from southwestern USA resembles the new species with their dentate rostrum. The new species can be distinguished from them by the following features: 1) rostrum with two dentate, divided by deep median incision in the new species (rostrum tridentate in R. (I.) cavernalis ; rostrum with two dentate, divided by wide and shallow incision in R. (I.) berninii and R. (I). corniculata ); 2) lamellar and trans-lamellar line present in the new species (lamellar and translamellar line absent in R. (I). corniculata ; short lamellar line present but trans-lamellar line absent in R. (I.) berninii and R. (I.) cavernalis ); 3) sensilli with 6-7 setae unilaterally, among them proximal setae longer than distal ones in the new species (sensilli with 8 setae unilaterally, different in length in R. (I). corniculata ; 5-6 setae unilaterally, different in length in R. (I.) berninii ; 8-10 setae unilaterally, equal in length in R. (I.) cavernalis .

Figures

FIGURE 1: Ramusella (Insculptoppia) pinarbasiensis n. sp. (a) - Dorsal view; (b) - Ventral view (scale bar for all figures = 100 µm).

FIGURE 2: Ramusella (Insculptoppia) pinarbasiensis n. sp. (a) - Dorsal view; (b) - Prodorsum; (c) - Rostrum and rostral setae.

FIGURE 3: Ramusella (Insculptoppia) pinarbasiensis n. sp. (a) - Leg I; (b) - Leg II; (c) - Leg III; (d) - Leg IV (scale bar for all figures = 40 µm).