Lebertiidae Thor, 1900b

Wang, J., Jin, D. & Guo, J., 2016, A new species and new record of the water mite genus Lebertia Neuman, 1880 (Acari: Hydrachnidia, Lebertiidae) from China, Acarologia 56 (1), pp. 121-128 : 121-124

Family Lebertiidae Thor, 1900b Genus Lebertia Neuman, 1880

Wang J. et al.

Lebertia (Pilolebertia) inaequalis ( Koch 1837) New record for China ( Figs. 1-2 )

For synonyms see Gerecke (2009).

Material examined — Three males. Slide numbers BJ-IV-20020503, BJ-IV-20020504, and BJ-IV- 20020507, from Beijing, P. R., China (40°07.76’N, 116°19.80’E) , 43 m asl, collected in the Shahe River near Wenquan Park, Beijing, leg. Jianjun Guo, 15 May 2002. One female. Slide number BJ-IV- 20020501. Same data as given for males. These samples are deposited in the Institute of Entomology, Guizhou University, Guizhou Province, P. R. China .

Remarks — Lebertia inaequalis was originally described from Germany by Koch in 1837. The main characteristics of the Chinese specimens match the description of Gerecke (2009), based on the smooth integument; short Cx-II (Cx-I/II ML ratio 1.32–1.44 in Chinese specimens, 1.1–1.7, generally> 1.3 in German specimens); slight but distinct indentation in gnathosoma; P-4 ventral margin divided by ventral seta insertions into 2: 1: 1; P-2 relatively long (28% total L of the palp in Chinese specimens, 25 – 28% in the German specimens); one minute peglike seta on P-4 and the swimming numbers of legs. However, the Chinese specimens still have one slightly difference compared with the description from Germany in the size of some of the palp segments. The Chinese specimens measure P-4 113 – 138 µm long, while the type specimens from Germany are 133 – 180 µm long. Nevertheless, as most of the main characteristics and measurements of the Chinese specimens fit well in the description of Gerecke (2009), we conclude that the Chinese specimens are of the same species as those from Germany.

Habitat — Pools of higher order streams, macrophyte belts in standing waters, especially in the wave-zone ( Lundblad 1968; Gerecke 2009), clean rivers.

Distribution — Extended parts of the Palaearc-

Wang J. et al.

tic ( Lundblad 1956; Lundblad 1968; Valdecasas and Camacho 1986; Gerecke 2009; Di Sabatino et al. 2010).

Figures

FIGURE 1: Lebertia (Lebertia) inaequalis (Male): A – Ventral view; B – Palp; C – Palp and gnathosoma; D – Genital field. Scale bars: A–D = 100 µm.

FIGURE 2: Lebertia (Lebertia) inaequalis (Male): E – III-L-1-6; F – IV-L-1-6. Scale bars: E–F = 100µm.