Lebertia (Lebertia) ignatowi Sokolow, 1930

Wang, Yu, Jin, Daochao & Guo, Jianjun, 2024, Water mites of the genus Lebertia Neuman (Acari: Hydrachnidia: Lebertiidae) from China, with description of three new species, Zootaxa 5399 (3), pp. 231-240 : 232

Lebertia (Lebertia) ignatowi Sokolow, 1930 ( Fig. 1 )

Material examined. Two females (slide numbers XJ-LE-19970801/04) from Kelan River , Altay Prefecture, Xinjiang Uygur Autonomous region, P. R. China (87.135103 E, 48.824092 N), 940 m a.s.l., leg. Daochao Jin, 16- VIII-1997 .

Diagnosis. Medial suture Cx-II relatively long. P-2/4 L ratio 0.90–0.94. P-4 robust, ventral setae dividing the segment into equal sectors. III-L-5 and IV-L-5 each bearing 3 swimming setae.

Description. Both sexes (data of the European specimens integrated in parentheses). Integument smooth ( Fig. 1B ). Medial suture Cx-II relatively long (Cx-I/II mL ratio 0.70–0.94) ( Fig. 1A ). Cx-II caudal margin rather wide (W 33–48). P-2 stouter (P-2/4 L ratio 0.90–0.94) ( Fig. 1C ). P-4 robust and cylindrical, the ventral seta insertions divide the ventral margin into 1: 1: 1. IV-L-6 with 2–3 ventral thin setae. III-L-5 and IV-L-5 each bearing 3 swimming setae ( Fig. 1F–G ).

Habitat. Both running and standing waters.

Distribution. Eastern Europe ( Gerecke 2009); China (Xinjiang)—New country record.

1) P-2 shorter than P- 4 in length (P-2/4 L ratio 0.90–0.94 in the Chinese specimen, 0.90 in the European specimen); 2) Cx-I shorter than Cx-II in medial length (Cx-I/II mL ratio 0.87–0.94 in the Chinese specimen, 0.70– 0.90 in the European specimen); 3) Cx-II caudal margin rather wide (W 33–44 in the Chinese specimen, 36–48 in the European specimen).

Figures

FIGURE 1. Lebertia (Lebertia) ignatowi Sokolow, 1930.A. Female ventral view; B. Female dorsal view; C. Palp; D. Chelicera; E. Gnathosoma; F. III-L-1–6; G. IV-L-1–6. Scale bar: A–G = 100 µm.