Dissorhina uludagensis, 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 : 18-20

Dissorhina uludagensis n. sp.

( Figures 4-6 )

Diagnosis — Rostral apex triangular, conspicuously protruding from the rostral part of prodorsum. Incisure wide, lateral teeth much shorter than the median teeth and sharped. Two pairs of weak transversal costulae present. Sensilli fusiform, as long as 70% of the length of prodorsum (42 µm in length), its head some minute aciculae.

Dimensions — Length: 204-228 (holotype: 212) µm, width: 104-120 (holotype: 104) µm (n=9).

Prodorsum — ( Figures 4a and 5 ) — Rostral apex triangular, conspicuously protruding from the rostral part of prodorsum. Incisures wide, lateral teeth much shorter than the median teeth and sharped. Rostral setae 10 µm in length, arising on this triangular apex. Two pairs of weak transversal costulae present. Lamellar and inter-lamellar setae smooth. Bothridia round, with small opening. Sensilli fusiform, as long as 70% of the length of prodorsum (42 µm in length), its head some minute aciculae.

Notogaster ( Figures 4a and 5a ) — Longer than wide, ratio 1.5:1. Anterior part well narrowed anteriorly, a short median part straight. Ten pairs of comparatively smooth notogastral setae present. The setae c2 and p series short, thin, 12 and 6 µm in length respectively, the remaining notogastral setae smooth, long 20 µm in length.

Ventral Side ( Figure 4b ) — Labiogenal articulation arched. Epimeral borders distinctly visible and strongly sclerotized. Epimeral setal formula 3-1-3-3, setae thin, short and smooth. Genital plates 24 µm in length, 24 µm in width, with five pairs of smooth setae, setae g1 longest, the remaining setae equal in length. Anal plates 34 µm in length, 32 µm in width, with two pairs of smooth, short setae. Distance between genital and anal plates 36 µm. One pair of aggenital and three pairs of adanal setae. Lyrifissures iad 4 µm in length, paraanal, anterior of ad2. The adanal setae ad 1 in postanal, ad 2 in paraanal and ad 3 in preanal positions.

Legs — Formula of leg setation (trochanter to tarsus): I (1-5-2+1-4+2-17+2); II (1-5-1+1-3+1-14+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 6 .

Material examined — Holotype ( ZMEU: 255) and ten paratypes ( ZMEU: 256-265), one of them were mounted on aluminum stubs and gold-coated for scanning electron microscopy, collected from soil and litter under fir trees, Uludaǧ Mountain (40°08’.13" N, 29°06’.21" E), Bursa, Turkey, 1634 m, 07 July 2008.

Etymology — Specific name " uludagensis " is named after the locality, Uludaǧ Mountain, Bursa, Turkey, where the new species was found.

Remarks — This new species stands very near to Dissorhina longispina Mahunka, 2006 by the shape and length of sensilli ( Mahunka 2006). However, it is distinguished from it by the following features: 1) two pairs of short transversal costulae present, not starting from the bothridia in the new species (one pair of short costulae present, starting from the bothridia in D. longispina ; 2) lamellar setae arising from anterior of transversal costulae (lamellar setae far beyond of costulae in D. longispina ); 3) sensillus fusiform, its head some minute aciculae in the new species (sensillus lanceolate, its head smooth in D. muranyii ) 4) body measurement in the new species: 204-228 / 104-120 µm (body measurement in D. muranyii : 290-301 / 140-147 µm).

Figures

FIGURE 4: Dissorhina uludagensis n. sp. (a) - Dorsal view; (b) - Ventral view (scale bar for all figures = 100 µm).

FIGURE 5: Dissorhina uludagensis n. sp. (a) - Dorsal view; (b) - Prodorsum; (c) - Rostrum and rostral setae; (d) - Sensillus.

FIGURE 6: Dissorhina uludagensis n. sp. (a) - Leg I; (b) - Leg II; (c) - Leg III; (d) - Leg IV (scale bar for all figures = 40 µm).