Lebertia (Lebertia) gimina, Wang & Jin & Guo, 2024

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 : 232-235

Lebertia (Lebertia) gimina sp. nov. ( Fig. 2 )

Material examined. Holotype: one female (slide number LN-LE-20190701) from Daheishan , Liaoning, P. R. China (120.505978 E, 42.019345 N), 524 m a.s.l., leg. Zhuhui Ding, 17-VII-2019 . Paratype: one female (slide number LN-LE-20190703), same data as holotype .

Diagnosis. P-3 with paired dorsal and two dorsodistal setae (two dorsodistal close to each other). P-4 maximum H in the distal part, distal part not narrowed, ventral sectors 3: 2: 3. Medial suture Cx-I relatively short (Cx-I/II mL 0.87 (0.92)). Legs without swimming setae.

Description. Holotype (paratype in parentheses). Female. Integument smooth ( Fig. 2B ). Cx-I medially slightly shorter than Cx-II, Cx-I/II mL 0.87 (0.92) ( Fig. 2A ). Cx-II caudal W 36 (26). V2 and V4 almost at the same level, these and V1 not fused to Cx-IV, but V3 often very close to Cx-IV margin. Cx-IV slender, posteromedial angles distinctly pronounced, with convex posterior margin. Excretory pore unsclerotized. Chelicerae close to the palp total length ( Fig. 2C ). Gnathosoma slender ( Fig. 2D ). P-2 stouter (L/H 1.39 (1.62)), ventral seta long and near the ventrodistal margin, three dorsal setae in row, dorsodistal seta long, medial seta long and near the dorsodistal margin. The proximal and distal margin of P-3 is almost equal ( Fig. 2E ), one long dorsal seta and one rather long dorsal seta close to each other at the medial region, two dorsodistal setae rather long and close to each other, ventrodistal seta rather long and close to distal edge of segment. P-4 maximum H in the distal part, proximal part narrowed but distal part not narrowed, peg-like seta at the terminal, ventral sectors 3: 2: 3. See Table 1 for the total number of leg setae. See Table 2 for measurements.

Male. Unknown.

Etymology. “gimina ” represents paired dorsal setae on P-3.

Habitat. Pond.

Distribution. China (Liaoning).

Remarks. This new species is similar to Lebertia (Lebertia) sparsicapillata Thor, 1905 in P-3 with paired dorsal setae, two dorsodistal setae on P-3 close to each other, P-3 stouter (L/H <2.5), P-3 shorter than P-4 (ratio P-3/4 L <1.0), P-4 maximum H at the distal part, P-4 not narrowed distally, but it differs in the following characteristics (data from Gerecke 2009): 1) P-4 ventral sectors 3: 2: 3 (2: 1: 1, occasionally 1: 1: 1 in L. sparsicapillata ); 2) legs without swimming setae (III-L-5 1–2, IV-L-5 2 in L. sparsicapillata ).

Figures

FIGURE 2. Lebertia (Lebertia) gimina sp. nov. A. Female ventral view; B. Female dorsal view; C. Chelicera; D. Gnathosoma; E. Palp; F. III-L-1–6; G. IV-L-1–6. Scale bar: A–G =100 µm.