Limnesides crassipes Smit & Pešić, 2022

K, Harry Smit, Pešić, Vladimir, K & K, Simon Clavier, 2022, Water mites from French Guiana, with the description of 14 new species (Acari: Hydrachnidia), Acarologia 62 (4), pp. 1119-1153 : 1125-1127

Limnesides crassipes Smit & Pešić sp. nov.

Zoobank: EB03A1B7-F619-46E5-8E2B-305522648F9D

( Figures 4 A-D)

Material examined — Holotype female, Régina, Crique Kapiri, 4.10382°N, 52.086531°W,

28 m a.s.l., 24 Oct. 2017, leg. S. Clavier ( RMNH).

Diagnosis (Male unknown) — Dorsum with a relatively small platelet (L 105), Cx-IV relatively short, not extending beyond posterior margin of genital field, the latter tapering anteriorly.

Description — Female – Idiosoma dorsally 632 long and 429 wide, ventrally 680 long.

However, integument very soft and measurements, therefore, give only an indication. Dorsum posteriorly with a small platelet, 105 long. Gnathosoma elongated, 200 long, but unfortunately not in a good position in the slide for illustrating it. Cx-I fused medially, suture line Cx-I/II incomplete, anterior coxae with short apodemes. Cxgl-4 between Cx-II and Cx-III. Cx-IV not 100 µm, B-D = 50 µm.

extending posteriorly beyond posterior margin of genital field. Genital field tapering anteriorly, 154 long, acetabula elongated and slightly contracted in the middle ( Figure 4A). Pregenital sclerite 26 wide. Some secondary sclerotization present anterior to genital field, pointed anteriorly. Length of P1-5: 26, 44, 48, 84, 26. P2 with an anteroventral seta, inserted directly on the segment ( Figure 4B). I-leg-4-6: 80, 76, 66. Length of IV-leg-4-6: 84, 82, 68. Fourth leg with thick, enlarged segments with many stout setae ( Figure 4C), IV-leg-1 elongated, IV-leg-6 with a minute claw and a stout pinnate seta ( Figure 4D), 32 long. Swimming setae absent.

Male – Unknown.

Etymology — Named for the thick fourth leg.

Remarks — The new species differs from L. epimerosus Lundblad, 1936 in the tapering genital field (not tapering in epimerosus ), the small dorsal platelet (large in epimerosus , covering

¾ of dorsum) and the smaller Cx-IV not extending to posterior margin of genital field (Cx-IV large, extending far extending to posterior margin of genital field epimerosus in).