Parathyas palustris (Koenike, 1912)

Esen, Yunus, 2022, Contribution to the water mite (Acari, Hydrachnidia) fauna of Turkey, Acarological Studies 4 (1), pp. 28-35 : 29-31

Parathyas palustris (Koenike, 1912)

Syn. Thyas palustris Koenike, 1912

Thyas rivalis Koenike, 1912

Material examined: Moist moss, Ahmetli , Erzincan, 39°57'25"N, 39°21'11"E, 2088 m a.s.l., 23.04.2014 (1/1/1).

Description: Male Idiosoma L/W 1005/743, integument papillate, frontale diameter 40, dorsal plates larger, preand postfrontale fused. Gnathosoma without short rostrum ( Fig. 1E ), vL 158. Palp segments dL and setation (in parenthesis) P-1 50 (1), P-2 84 (6), P-3 51 (2), P-4 140 (3- 4) P-5 39 (2). Chelicera total L 226. Genital field L/W 220/141, genital flap L/W 173/70, posterior margins of genital flap bearing 8-9 setae, pregenital sclerite round and separate ( Fig. 1F ). Ac-3 located posterior Ac-2, their basal sclerites forming less elongated stalks. Excretory pore with anterior and posterior sclerites, anterior sclerite crescent shaped ( Fig. 1G ).

Female Idisoma L/W 1230/940, frontal eye plate large (diameter 55), pre- and postfrontale fused ( Fig. 1A ). Palp segments setation same as male ( Fig. 1B ), palp segments dL and setation (in parenthesis) P-1 53 (1), P-2 105 (6), P-3 62 (2), P-4 170 (3-4), P-5 40 (2). Chelicera total L 320. Genital field L/W 298/200, genital flap L/W 272/96, posterior margins of genital flap bearing 8-9 setae, pregenital sclerite fused with anterior genital sclerite ( Fig. 1C ). Excretory pore with similar anterior and posterior sclerite ( Fig. 1D ).

Records from Turkey: Erzurum (as Thyas rivalis ) (Özkan and Erman, 1999).

Distribution: Holarctic (in Europe not recorded from the Iberian Peninsula); North America, Turkey ( Di Sabatino et al., 2010a; Erman et al., 2010).

Figures

Figure 1. Parathyas palustris, female: A. Idiosoma, dorsal view, B. Palp, medial view, C. Genital field D. Excretory pore; Male: E. Gnathosoma, F. Genital field, G. Excretory pore (Scale bars = 100 µm).