Lebertia (Lebertia) disparilis, Gerecke & Smit, 2022

Gerecke, Reinhard & Smit, Harry, 2022, Water mites of the genusLebertia Neuman, 1880 from the eastern Himalayas (Acari: Hydrachnidia: Lebertiidae), Acarologia 62 (2), pp. 302-316 : 307

Lebertia (Lebertia) disparilis n. sp.

Zoobank: DFB7EDBE-F312-4393-92A6-DFA3AE09BBEF

( Figures 3 A-D, 6C)

Type series — Holotype ♂, Nepal 05, Garden stream, Nunthala ( Figure 6C ), 27°35.343′

N, 86°38.529′ E, 1955 m a.s.l., 13 Apr. 2016 leg P.W. Veel ( RMNH). Paratype: ♂, Nepal 07,

Bhujekhung, Stream, 28°31.714′ N, 83°01.648′ E, 3110 m a.s.l., 10 Oct. 2016 leg P.W. Veel,

slide mounted ( RMNH).

Diagnosis — (male, female unknown) Integument with a very fine reticulation; legs without swimming setae; palp with a stout, dorsally strongly curved P-2 (L/H 1.4), P-3 with

5 long setae, centrodistal seta closer to ventrodistal seta (A/B 0.2-0.6); P-4 long and slender

(L/H 4.0-4.3, L ratio P-2/-4, 0.60-0.66), maximum H in proximal part, insertions of setae dividing ventral margin in three unequal sectors (the central the longest, the distal the shortest:

30-33/47-49/19-23 %).

Description — Male: Integument meshes rather fine (diameter ca. 3 µm), locally slightly elongated (dorsally arranged longitudinally, posteroventrally transverse. Cx-I and -II subequal in medial length (ratio 0.9-1.1), posterior margin W 25-30. Coxal shield extending to lateral idiosoma, subcircular in outline, also at posterior margin Cx-IV ( Figure 3A ); posteromedial edge of Cx-IV subrectangular (in the juvenile holotype ♂) or slightly projecting to embrace genital field (paratype), V3 and V1 not fused to coxal shield. Proportions and setation of distal segments of I- and IV-L as in Figure 3 C-D; IV-L-6 slightly bowed, with 2-3 fine and short ventral setae ( Figure 3D ); IV-L claw L 47. Genital field compact with lateral margins of genital flaps nearly straight and diverging in anterior half, rounded in centre and posterior part, medial setae (about 20) in a single row, in addition, rather numerous (about 10) equidistant lateral setae. Excretory pore smooth. Gnathosoma ventral margin in proximal half and proximally to mouth opening nearly straight, in the distal 2/3 strongly bowed. P-2 relatively robust (L/H

1.41-1.43), dorsal margin strongly bowed, ventral seta inserted about 10 from distoventral edge, shorter than L of segment ( Figure 3B ); P-3 slender, slightly curved, dorsal and ventral diverging distally, 2 of the 5 long setae away from each other dorsomedially in proximal part,

centrodistal seta closer to ventrodistal one, distoventral seta near segment edge; P-4 slender with maximum H in proximal part from here to tip dorsal and ventral margin equally converging,

one dorsal hair-like seta near proximal segment edge, all others in a group near distal edge,

mediodistal peg-like seta very fine, tip obtuse; proximoventral seta at about from ⅓ ventral margin, distoventral seta away, less than ¼ ventral margin from distal segment edge; P-5 short.

Etymology — Named for being morphologically very different from all other species of the genus.

Figures

Figure 3 Lebertia(Lebertia) disparilisn. sp.., type series, ♂; A – coxal and genital field (partial view); B – right palp lateral; C – I-L-4-6; D – IV-L-4-6. Scale bars: 100 µm.

Figure 6 Collection sites. A – Haa River (Bhutan 03); B – Sertu Khola, Nunthala (Nepal 06); C – Garden stream, Nunthala (Nepal 05); D – Surke Khola (Nepal 04); E – stream S of Gokyo (Nepal 01); F – stream Dudh Kosi Nadi (Nepal 02). Authors: W. Klein (A), P.V. Veel (B-F).