Lebertia (Lebertia) pseudomaglioi Wang & Guo, 2016

Wang, Jialin, Jin, Daochao, Yi, Tianci & Guo, Jianjun, 2016, Water mites of subgenus Lebertia (Lebertia) Neuman from China (Hydrachnidia: Lebertiidae), Zoological Systematics 41 (1), pp. 54-63 : 59-62

3.3 Lebertia (Lebertia) pseudomaglioi Wang & Guo , sp. nov. ( Figs 16–23 )

Diagnosis. P-4 with maximum height in basal part, distal part narrow. Cx-IV with obtuse angled posteromedial edges, medial suture lines Cx-I and Cx-II nearly equal in length. IV-L-5 with only 2 ventral setae, IV-L-6 without ventral seta, legs without swimming seta.

Description. Male. Idiosoma ( Figs 16–17 ). Color yellow to brown. Idiosoma elliptical in outline, integument with sculptured surface ( Fig. 20 ), 670–870 long, 512–750 wide. Gf 200–202 in length, 129–150 in width.Acetabula 3 pairs, first pair 62–65 in L, second 53–55 and third 39–43. Coxal plates single group, 666–690 in length and 483–550 in width, Medial suture Cx-I and Cx-II nearly equal in length, Cx-I ML 174–180, Cx-II ML 173–179, Cx-I/II ML ratio 1.00–1.01; posterior margin of Cx-II rather broad about 34–35 in width; suture line between Cx-III and Cx-IV not reaching to inner extremity but 2/3 of plate; posterior margins of Cx-IV slightly extended and surround 4/5 of genital field. Ib-Gf 346–360; Ib-Ap 650–680. Ib U-shaped, depth 145–160, width 89–90. Excretory pore smooth. Gnathosoma 194–220 in length. Chelicera 244–250 in length ( Fig. 19 ).

Palp ( Fig. 18 ). P-2 with 6 setae, of which 3 short dorsal setae, 2 long dorsodistal setae almost reaching to 1/2 of P-3, and ventral seta on 2/3 of P-2 and almost as long as ventral length of P-2. P-3 with 5 setae, dorsal setae inserted close to each other (distance about 6.8–8), mediodistal seta inserted close to dorsodistal seta (distance about 3.42–5), 1 ventrodistal seta inserted away from ventrodistal segment edge. P-4 with 8 setae, of which 1 dorsal seta inserted at centre of segment, 5 dorsodistal setae thin and short, peg-like seta strong reaching to 1/2 of P-5, ventral setae insertions divide ventral margin into 1:1:2. Length/height of palp segments: P-1, 30–37/42–43 (ratio 0.70–0.88); P-2, 91–100/63–66 (ratio 1.38–1.59); P-3, 90–95/45–48 (ratio 1.98–2.00); P-4, 116–125/39–40 (ratio 2.97–3.13); P-5, 33–36/13–14 (ratio 2.54–2.57). Total length of palp, 378–384.

Legs ( Figs 22–23 ). I-L-1 with 3 setae, of which 2 inserted at dorsodistal of segment, third at dorsal part. I-L-2 with 4 dorsal and 1 ventrodistal setae. I-L-3 with 4 dorsal and 2 ventral setae. I-L-4 with 3 dorsal setae. I-L-5 with 2 dorsal setae and 1 ventral seta inserted close to terminal part of segment. I-L-6 with 5 hair-liked setae close to distal edge of segment. IV-L-4 with 3 dorsal and 3 ventral setae. IV-L-5 with 2 dorsal and 3 strong ventral setae. IV-L-6 with 4 setae, of which 1 at dorsal centre part of segment, 3 fine dorsal setae at distal edges of segment. Length/height of legs: I-L-1, 63–75/50–60 (ratio 1.25–1.26); I-L-2, 115–122/59–60 (ratio 1.92–2.07); I-L-3, 98–100/49–50 (ratio 1.96–2.04); I-L-4, 145–153/52–53 (ratio 2.79–2.89); I-L-5, 155–161/48–51 (ratio 3.16–3.23); I-L-6, 125–134/43–47 (ratio 2.85–2.90); IV-L-4, 215–242/ 53–54 (ratio 4.06–4.48); IV-L-5, 255–262/44–48 (ratio 5.46–5.80), IV-L-6, 220–243/50–55 (ratio 4.40–4.42). Numbers of peg-like setae on IV-L-4–6: IV-L-4, 5; IV-L-5, 4. No swimming seta on legs.

Female. Unknown.

Material examined. Holotype, male, Hanasi Lake, Xinjiang, China (47°14.64'N, 87°12.41'E; elev. 1 374 m), 14 August 1997, coll. Daochao Jin, slide number XJ-IV-1997081401. Paratypes: 3 males, slide numbers XJ-IV-1997081402, XJ-IV- 1997081403 and XJ-IV-1997081404, same data as holotype .

Etymology. “ pseudo- ” means “not real” or “imitated”. The new species is named after the species Lebertia (Lebertia) maglioi Thor, 1907 (Thor, 1907) which is similar to the new species.

Habitat. Stream.

Distribution. Palaearctic Region ( China (Xinjiang )).

Remarks. This new species is similar to Lebertia (Lebertia) alia Semenchenko & Tuzovskij, 2010 from Russia, and L. (L.) maglioi Thor, 1907 from Germany, respectively. The new species is similar with L. alia by the ventral seta insertions divided the ventral margins of P-4 into 1:1:2 and the similar length of suture lines (Cx-I/II ML ratio 0.96–1.17 in L. alia). But they can be distinguished by the following: 1) Integument of L. alia with fine striation and porosity while the new species with sculptured surface; 2) Cx-IV of L. alia with nearly right angled posteromedial edges while the new species with obtuse angled posteromedial edges ( Fig. 16 ); 3) Ventrodistal seta longer than ventral margin of P- 2 in L. alia while the new species not ( Fig. 18 ); 4) III-L-5 and IV-L-5 each with 1 short swimming seta in L. alia but the swimming seta of the new species reduced completely ( Figs 22–23 ); 5) Each genital flap in males with 18–24 medial and 6–7 lateral setae in L. alia while the new species bearing 4 medial setae and without lateral setae on each genital flap ( Fig. 21 ). The data of L. alia from Semenchenko & Tuzovskij (2010).

The new species is also very similar to L. maglioi in these points: 1) P-4 with maximum height in basal part, distal part narrow; 2) The suture lines similar in length (Cx-I/II ML ratio 0.9–1.1 in L. maglioi); 3) Distance between dorsal setae of P-3 <20. But they can be distinguished by the following: 1) Integument of L. maglioi smooth, while the new species with sculptured surface; 2) Cx-IV of L. maglioi with nearly right angled posteromedial edges while the new species with obtuse angled posteromedial edges ( Fig. 16 ); 3) III-L-5 with 1 and IV-L-5 with 2 swimming setae in L. maglioi while no swimming seta in the new species ( Figs 22–23 ); 4) IV-L-6 of L. maglioi with 2 small ventral setae, but IV-L-6 of the new species without ventral seta ( Fig. 23 ); 5) IV-L-5 of L. maglioi with 3-4 ventral setae and 2 ventrodistal setae, but in L. pseudomaglioi with 2 ventral setae and 1 ventrodistal seta ( Fig. 23 ). The data of L. maglioi from Gerecke (2009).

Figures

Figures 16–17. Lebertia (Lebertia) pseudomaglioi Wang & Guo, sp. nov., male. 16. Ventral view. 17. Dorsal view. Scale bars = 100 µm.

Figures 18–23. Lebertia (Lebertia) pseudomaglioi Wang & Guo, sp. nov., male. 18. Palp. 19. Gnathosoma. 20. Dorsal integument structure. 21. Genital field. 22. I-L-1–6. 23. IV-L-4–6. Scale bars: 18–20, 22=50 µm, 21, 23=100 µm.