Parathyas colligera (K. Viets, 1923)

Esen, Yunus, 2022, Contribution to the water mite (Acari, Hydrachnidia) fauna of Turkey, Acarological Studies 4 (1), pp. 28-35 : 31

Parathyas colligera (K. Viets, 1923)

Syn. Thyas distinctus Tuzovskij, 2007

Material examined: Wet moss, Ahmetli , Erzincan, 39°52'54"N, 39°20'31"E, 2048 m a.s.l., 08.05.2014 (1/2/0).

Description: Male Idiosoma L/W 1106/910, integument papillate, frontale diameter 50, dorsal plates smaller, preand postfrontale fused ( Figs. 2A , 4A ). Gnathosoma vL 220. Palp segments dL and setation (in parenthesis) P-1 50 (3), P-2 106 (6), P-3 60 (3), P-4 152 (3), P-5 32 (2). Chelicera total L 295. Genital field L/W 238/161, genital flap L/W 170/78, posterior margins of genital flap bearing 9-10 setae, pregenital sclerite round and separate ( Fig. 2B ). Ac-3 located posterior Ac-2, their basal sclerites forming more elongated stalks. Excretory pore with anterior and posterior sclerites, anterior sclerite crescent shaped, posterior sclerite small and roundish ( Fig. 2C ).

Female Idisoma L/W 1442/1160, frontal eye plate large (diameter 50), prefrontale and postfrontale not fused ( Figs. 3A , 4 B-C). Palp segments setation same as male ( Figs 3B, C ), palp segments dL and setation (in parenthesis) P-1 60 (3), P-2 112 (6), P-3 65 (2), P-4 163 (3-4), P-5 33 (2-3). Gnathosoma with short rostrum, vL 250, chelicera total L 351. Genital field L/W 297/208, genital flap L/W 240/100, posterior margins of genital flap bearing 8- 9 setae, pregenital sclerite separate with anterior genital sclerite ( Fig. 3E ). Excretory pore with large anterior and small posterior sclerite ( Fig. 3F ).

New record for Turkey

Distribution: Germany, The Netherlands, Russia ( Di Sabatino et al., 2010a).

Figures

Figure 2. Parathyas colligera, male: A. Idiosoma, dorsal view, B. Genital field, C. Excretory pore (Scale bars = 100 µm).

Figure 3. Parathyas colligera, female: A. Idiosoma dorsal view, B. Palp, lateral view, C. Palp, dordal view, D. Capitulum, lateral view, E. Genital field, F. Excretory pore (Scale bars = 100 µm).

Figure 4. Parathyas colligera, A. Frontal area of male, B-C. Frontal area of female (arrows indicate prefrontale variability in females).